ppdcl_consolidatedclarifications03_04062015

Consolidated Replies No.3

2x55MW (Gross) PPDCL Coal Fired Power Project Sunder Lahore Punjab Power Development Company Ltd

of 59

REPLIES TO THE QUERIES OF BIDDERS – 2X55 MW COAL FIRED POWER PROJECT AT SUNDER INDUSTRIAL ESTATE LAHORE

Sr. No.

Specification

Volume

Clause No./Section No.

Clause and Reference Deviations /Clarifications PPDCL’s Response

1.GENERAL Layout

1.

Volume IV Drawings in PDF

MMD-345023-C-DR-02-00-0003-Borehole Location Layout.pdf

Borehole Location Layout The coordinates system in drawing Borehole Location Layout is inconsistent with the coordinates system in drawing PLOT PLAN. Please check and provide the correct coordinates of the boreholes.

Borehole locations are shown for providing preliminary information on soil of the project site. Coordinates of bore hole location and grid line of plot plan cannot be correlated.

Volume IV Drawings in PDF

MMD-320682-Z-DR-02-00-0002.pdf

PLOT PLAN

2. Volume IV Drawings in PDF

MMD-320682-Z-DR-02-00-0002.pdf

PLOT PLAN 1. The coordinates of power plant boundary should be some mistake. For example, The coordinate of the power plant northwest corner is N 346346.461, but the coordinate adjacent grid line is N 3463500. Please check and provide the correct coordinates of power plant boundary. 2. Please provide the AutoCAD format of the drawing.

Coordinates of grid line under revision. The soft copy of Drawing in AutoCAD format will be provided.

2 .MECHANICAL

3. Volume II Part A P1 1.4 Climate The major Meteorological data from the nearest meteorological station is as follows:

As bidder understanding, meteorological data in the table 1.1 is not for guarantee condition. Please provide the ambient parameter (e.g. temperature (dry bulb), relative humidity and barometric pressure) for

Ambient air temperature of 27 °C & RH of 60% has been specified for guarantee of Boiler efficiency and auxiliary power condition. Wet bulb

temperature of 28 ℃ shall be considered for design and guarantee of cooling water system



of 59

performance guarantee condition. and turbine cycle heat rate.

4. Volume II Part A P1 Part B P5&6

1.4 Climate The major Meteorological data from the nearest meteorological station is as follows: Monthly Mean Maximum Temperature 41.8 °C Monthly Mean Minimum Temperature 6.9 °C 1.22 Draft fan – FD Fan Design

basis Fan inlet air temp 50°C … 1.24 Primary Air Fan Fan inlet air temp 50°C …

The inlet air temperature of FD fan and PA fan should equal the environment temperature. It is changed with the environment temperature.

Please comply with temperature specified for FD and PA fan design.

5. Volume II Part B Section B1 P1 Part B Section B P1

Steam pressure at SH outlet bar absolute (Tentative) 110 bar Steam generators will be of semi outdoor type, sub critical pressure, natural circulation, non-reheat and dry bottom type Circulating Fluidized Bed Combustion (CFBC)

110bar is high pressure parameter not subcritical, they are contradictory. Bidder recommends high pressure parameter steam generator for this project.

110 bar (tentative) has been specified. This value is aligned with sub-critical parameter. Bidder may quote higher parameter if it proven for this capacity of Boiler and Turbine offered by the Bidder.



of 59

units designed to burn 100% imported coal and 100% local coal.

6. Volume II Part B Section B1 P6

1.26 Steam Coil Air Pre-Heaters (SCAPH)

SCAPH outlet air temperature with maximum air flow corresponding to

oil firing condition 100 ℃

SCAPH outlet air temperature is

determined by manufacture

requirement. Bidder will design

according to the manufacture

requirement.

Please follow the specification requirement. Bidder may follow manufacturer’s requirement if it is more stringent than specification requirement


1.32 Seal Air Fans Number per SG unit 2 x 100%

Seal air fan is not required for

circulating fluidized bed unit, and

the sealing air will be provided from

primary air system.

Bidder’s proposal shall be evaluated during detailed engineering.


Condenser design pressure 0.1 Kg/cm2 (abs) at 33 deg. C cooling water temperature

As bidder understanding, 0.1Kg/cm2 (abs) is applied to physical design of the condenser, but not back pressure for performance guarantee case. Please kindly confirm that.

Condenser pressure of 0.1Kg/cm2 (abs) at at 33 deg. C cooling water temperature shall be guaranteed by the bidders


6 Condenser Design cold water temperature 33 deg C when CT is designed for 32 deg. C outlet temperature

The condenser inlet CW temperature shall be the same as CT outlet CW temperature which is 32 deg. C.

Bidder to comply with specification requirement Margin has been considered in CW temperature at condenser inlet and cooling water temperature at cooling tower outlet to take care of temperature rise in CW pump and degradation in performance with time.


6 Condenser Tube thickness 22 BWG

Tube thickness shall as per OEM optimization.

Bidder may offer higher thickness


6 Condenser Corrosion allowance in water boxes and tube plates minimum 3.2 mm

Corrosion allowance shall as per OEM standardized proven design.

Bidder may offer higher thickness



of 59


6 Condenser Minimum CW temperature rise across condenser at condenser design condition 10 deg.C

This requirement is not reasonable, since Owner has already asked condenser design pressure of 0.1kg/cm2(a) at 33 deg.C, if CW temperature rise is more than 10deg.C, the condenser TTD will be less than 2.4 deg.C which does not comply with HEI requirement. Thus, CW temperature rise will as per Bidder optimization/design.

Bidder to comply with specification requirement. Bidder may bring out the contradiction with HEI requirement in its proposal.


7 Condenser Air Evacuation system Design of air removal section to cool the air and vapour mixture corresponding to 25.4mm Hg (abs) 4.17°C below saturation temperature

Shall as per HEI. Bidder to comply with the specification requirement. Bidder may bring out the HEI requirement in their proposal


9 Heat Exchangers type (HP and LP Heaters) Material of tube stainless steel type 316

Material of tube will be TP304 or equivalent as per Bidder optimization.

Bidder to comply with the specification requirement.


10 Feed Water Heating Plant (HP and LP Heaters) Corrosion allowance on each heater shell and water box 3.2 mm

Corrosion allowance shall as per OEM standardized proven design and HEI.



4.1 Velocity Limits for calculating the inside pipe diameter are as follows:

Fluid velocity shall as per Bidder optimization/design.



10.2 Self-Cleaning Strainers 4 Material Of Construction Strainer screen / section SS 316. Shaft SS 316. Supporting cage SS 316. Differential Measuring System SS 316. Flushing / Backwashing Unit SS 316

Material shall be TP304 or as per Bidder optimization/design.




of 59

Any other internal hardwares / pipes, etc. SS 316


10.3 Induced Draft Cooling Tower Cooling range (

oC) 10

oC

The CT cooling range shall match CW temperature rise which shall as per Bidder optimization/design.



Splash Fill PVC Please confirm is film fill can be used or not.



10.4 DMCW Pumps for both units Operating Range 40% to 120 % 0f rated flow

DMCW pump flow is not regulable. Flow control has not been specified but pump characteristic should meet the specification requirement. Flow may vary depending on number of coolers in service and flow in coolers.


10.5 Plate Type Heat Exchangers Heat Transfer plate SS-AISI-316

Heat transfer plate shall be TP304 or as per Bidder optimization/design.



11.1 Specification Requirement Schedule for Plant Water System 1 Raw Water Intake system Capacity M3/hr 435 or process requirement whichever is higher

Capacity shall as per Bidder design. Bidder to comply with the specification requirement.


11.1 Specification Requirement Schedule for Plant Water System 1 Raw Water Intake system Margin in pump flow over continuous requirement 20%

5% flow margin is to be considered; otherwise high margin will make the pump not operate at high efficiency point during Plant normal operation.

Bidder to comply with the specification requirement. Bidder clarification generally applicable to continuously running pumps without limited storage capacity in the system. But the explanation given by bidder is not applicable for River water intake system in view of storage capacity available in Raw water reservoir.



of 59


11.1 Specification Requirement Schedule for Plant Water System 1 Raw Water Intake system Impeller and shaft SS316 Fastener SS316




4 In plant Raw Water Pumps Rated pump head m As per process requirement with 10% margin.

5% head margin is to be considered; otherwise high margin will make the pump not operate at high efficiency point during Plant normal operation.



Material of clarifier shaft and Paddle, Flash mixer agitator SS316

Material shall as per Bidder optimization/design.



12 Material of Construction of Pumps handling Clarified, Filtered, UF, Potable and Service Water Impeller SS316 Shaft SS316 / SS410



28. Volume II Part B- Section B-Mech Specification

5.6.1.2 Unit Gross Heat Rate Unit Gross Heat rate in KJ/KWhr under rated steam conditions at 0.1 Kg/cm2 (abs) design condenser pressure with zero make up at 100% TMCR, 80% TMCR and 60% TMCR unit load while firing performance coal.

Since there is already guarantee for Unit Net Heat Rate (weighted), Unit Gross Heat Rate for each case shall not be guaranteed otherwise there will be reduplicative guarantee.

Incorrect section of specification has been referred. It seems, clarification refers to Volume-II Part-A. Please refer to clause 5.3 of Volume-II Part-A. Net heat rate is being computed from gross heat rate and hence gross heat rate shall be demonstrated and net heat rate shall be calculated from the demonstrated Gross Heat Rate.

29. Volume II-Part B- Section B-Mech Specification

6.1 system description

The coal shall be transported to the project site through trucks.

Please provide the truck transport distance.

Transport of coal to the project site is responsibility of Owner.

30. Volume II-Part B- Section B-Mech

6.1.1 Truck Unloading Facilities

Capacity of each truck will be 50 Tonnes

Does the truck is Dump truck or not? Please provide the truck shape parameter, including the truck width,

Truck tippler design should take care of various types of truck available in the market up to 50 T capacity



of 59

Specification

length, height during normal mode and unloading mode.


6.1 system description

Coal flow diagram has been depicted in Drawing no MMD-345023-M-DR-02-00-012

Please provide the coal flow diagram which in drawing NO. MMD-345023-M-DR-02-00-012

Already provided to prequalified bidders.


6.1.2 Conveying, Crushing and Bunker Feeding System

The coal from surge hoppers SH-1/2 is fed into the crushers CR-1/ 2 through vibrating feeder 2A/B .Crushed Coal from crushers is fed to screens SCR-1/2 in screen house to screen out (-) 6 mm coal present in the feed. The (+) 6 mm coal from the screens will be recycled and will be fed to the crushers CR-1/ 2 by conveyors BCN-3A/3B for crushing it down to (-) 6 mm size.

We suggest canceling the surge hoppers, to make the crusher house elevation lower, and set the crushers and screens capacity larger than the conveyor belt system capacity. Please confirm. And please provide the type of conveyors BCN-3A/3B.

Bidder proposal shall be evaluated during detailed engineering



The motor operated travelling tripper TR-1/2 provided on conveyors BCN-5A/5B will fill the coal into the bunkers.

Considering the economy and easy operation, Bidder recommended using plough unloaded to replace the tripper conveyors. Up to now, the information about plough unloader we get from the running power plant shows that, the plough unloader is reliable and easily operated / maintained. please confirm

Bidder to comply with the specification requirement. However bidder may bring it as deviation in the proposal with price of withdrawal for this deviation.


6.3.1 Mechanical Equipment / System

Deck plate of minimum 3.15 mm thickness shall be provided for full length of all conveyors.

Head cleaner device and return belt cleaner will be provided to avoid the spillages go into the tail pulley and take-up pulley, so we suggest canceling the full length deck plate, or provide the deck plate under the loading area only. Please confirm.




of 59

35. Volume II-Part B- Section B-Mech Specification Volume 1 Contractual 1

6.1.3 Coal Feed from Stockyard 6.3.1 Mechanical Equipment / System 2 Project Description

The coal in two stockyard shall have adequate storage for at least 30days coal consumption The capacity of coal stockyard shall be adequate for storing coal for 20 days maximum continuous requirement (MCR). Coal storage 45 days.

These three descriptions are different, please indicate which is correct.

Please follow the requirement given in clause 6.1.3 of Volume II-Part B- Section B-Mech Specification


7.1 System Description

The lime of maximum Lump Size (-) 25 mm shall be transported to the project site through trucks.

Does the truck is Dump truck or not? Please provide the truck shape parameter, including the truck width, length, height during normal mode and unloading mode.



Lime flow diagram has been depicted in drawing no MMD-345023-M-DR-02-00-015.

Please provide the limestone flow diagram which in drawing NO. MMD-345023-M-DR-02-00-015.

This drawing has been provided to prequalified bidder

38. Volume

II-Part B-

Section

B-Mech

Specificati

on

9.1.1 Bed Ash

Handling

System

The silo shall be of RCC type

construction

Bidder recommended use steel

structure silo to instead of RCC type

construction.

For the bed ash is only a little, the

steel structure is suitable for bed

ash storage.

Bidder may provide steel silo for

bed ash.



of 59

39. Volume II-

Part A-

General

Technical

Requirem

ent

Sundar

5.6.2.2 Steam

Generator

Efficiency

Efficiency of the steam generator at

100% TMCR, 80% TMCR and 60%

TMCR at 27deg C ambient

temperature and 60% RH while

firing the performance coal at rated

steam parameters, and rated

excess air.

The steam generator efficiency of

60% TMCR cannot guaranteed by

OEM, so bidder can guaranteed for

100% TMCR, 80% TMCR only.

Bidder to comply with specification requirement.

40. Volume

II-Part B-

Section

B-Mech

Specificati

on

1.3.15 Auxiliary

Steam System To meet the continuous and startup

auxiliary steam……

Please confirm whether new

auxiliary boiler is required or not,

Please confirm.

If required please confirm the fuel of

auxiliary boiler.

Auxiliary boiler shall be provided if it

is required for commissioning of

boilers and startup of boiler after

long shutdown. HSD shall be used

as fuel if Auxiliary Boiler is provided

41. Volume

II-Part B-

Section

B-Mech

Specificati

on

1.3.17 Draft

Plant

b) Induced Draft Fans

Two ID fans (2 x 60% BMCR) shall

be provided and they shall be of the

radial backward curved type with

renewable liners and variable

frequency drive.

The ID fan is radial type with guide

vane control and considering the

economy and easy operation,

Bidder not recommended use

variable frequency drive, please

confirm

Bidder to comply with specification

requirement

42. Volume

II-Part B-

Section

B-Mech

Specificati

on

1.3.20.1 Coal

bunkers The effective bunker live storage

capacity for each boiler shall give

16 hours operation of the boiler at

BMCR, taking 15% filling factor

considering Coal as worst fuel firing.

Bidder recommended the effective

storage capacity of bunker is 12

hours operation of the boiler at

BMCR with design coal, please

confirm.


requirement.

43. Volume

II-Part B-

Section

1.1 Type of

Steam

Generator

Steam generators will be of semi

outdoor type, sub critical pressure,

natural circulation, and non-reheat

Please confirm the steam generator

is out door type or semi outdoor

type.

Steam generators will be of semi

outdoor type



of 59

B-Mech

Specificati

on

and dry bottom type Circulating

Fluidized Bed Combustion (CFBC)

units designed to burn 100%

imported coal and 100% local coal.

Provision to fire HSD during start-up

and stabilization will also be made.

The steam generators shall be top

supported, Circulating Fluidized

Bed Combustion (CFBC), balanced

draft, outdoor type with all

auxiliaries, integral piping and

elevators.

44. Volume

II-Part B-

Section

B-Mech

Specificati

on

9.1.1 Bed Ash

Handling

System

The bed ash collected in the

Denseveyor shall be conveyed to

bed ash silo through MS pipes by

pressure conveying.

In our experience, Mechanical

transporting system is better than

pneumatic system for bottom ash

conveying.

We advise using bucket-chain

conveyer and bucket elevator

convey and lift the bottom ash into

the bottom ash silo.


requirement as mechanical

conveying will create dusty

environment. However bidder may

bring this proposal as deviation with

price of withdrawal for this

deviation.

45. Volume

II-Part B-

Section

B-Mech

Specificati

on

9.1.3 HCSD

Disposal

System

There is a large number of calcium

oxide (CaO) in the ash of CFBC

boiler, when meeting water, the

ash will harden quickly, stick in the

pipeline. So the HCSD system is

not suitable for CFBC boiler ash.


requirement. However bidder may

bring this proposal as deviation with

price of withdrawal for this

deviation.

Decision shall be taken after

discussion with all the Bidders



of 59

We advise that Cancel HCSD

system, the ash from fly ash silo

and bottom ash silo will be

transported to ash disposal area by

truck.

during post bid discussion.



Size above 0.25mm after separating from Separators will be fed again to Mills by Screw conveyors SC-1/2 by further crushing to size below 0.25 mm. Lime size below 0.25 mm will be fed to Product hoppers-1/2.

Bidder will set the limestone mill outlet size as the requirement of boiler manufacturer. Please confirm.

Boiler manufacturer’s requirement shall be brought out in the proposal. Decision shall be taken in post bid discussion.



The (+) 6 mm coal from the screens will be recycled and will be fed to the crushers CR-1/ 2 by conveyors BCN-3A/3B for crushing it down to (-) 6 mm size.

Bidder will set the coal crusher and screen outlet size as the requirement of boiler manufacturer. Please confirm.

Boiler manufacturer’s requirement shall be brought out in the proposal. Decision shall be taken in post bid discussion.


Margin over 100% BMCR pressure requirement 44%

According to relevant standard and project experience, the margin with 20% is recommended by bidder.

Bidder to comply with specification requirement.

49. Volume II Part B Section B1 P2 Part B Section B P19

1.8 Combustor … In bed Sulphur Capture (for range of coal) 90% minimum Crushed Lime stone storage bunker of 16 hrs storage capacity at 100% BMCR for the range of coal specified along with feeding arrangement to each boiler considering at least 95% Sulphur capture for the range of coal specified and considering highest sulphur content in coal with redundancy in feeding system.

As bidder understanding, sulphur capture efficiency is not key point. Bidder will meet the environmental requirements of owner.

Sulfur capture efficiency, lime stone utilization, and SO2 emission for each type of coal specified shall be brought out in the Proposal.



of 59

3. WATER SUPPLY & CHEMICAL

50. Volume II Part A- General Technical Requirement Sundar

1.12 Raw Water Source

Plant water requirement shall be met form the Kahna Minor that flows in front and parallel to the plant site at a distance of about 20m. Besides annual maintenance closures of Kahna Minor, the extended/ unforeseen closures of the canal are expected during floods in respective rivers during monsoon season to protect the canal from bank breaches/ overflows/ other possible damages etc. To meet the raw water requirement during canal closure a backup arrangement shall be made for underground water at Kahna Minor canal bank by ins telling deep bore well pumps.

As there is not enough hydrogeololgy information about the canal, design scheme is based on that the water intake and discharge will not influence the water quality and hydrologic condition of canal. After the hydrogeololgy information about the canal received, the design base on it will be updated with cost. Waste water after treatment from the plant will be discharged into the canal during drought period of canal, assuming minimum dilution 1:10 ratio (one cubic meter treated water have 10 cubic meter canal water). Please kindly confirm if there is existing deep well which can be used for the project. And provide the data (capacity, depth, diameter, influence radius, quantity, location, etc..) about the deep well.

No cost update is permitted after submission of Bid. Bidder may visit the canal and satisfy itself regarding the design requirement. All study required for the design is in the scope of Bidder. Waste water shall not be discharged to canal. Please comply with the specification requirement regarding discharge of waste water. Bore well as specified in Clause 11.1.1, Volume II Part B is in the scope of Bidder. All study required for the design is in the scope of Bidder.

51. Volume II Part A- General Technical Requirement Sundar

3.2.1.9 Water System

Raw Water reservoir for 20 days water storage

Water reservoir for 20 days water storage will be really huge, please give the explanation about the storage period design.

Bidder to comply with specification requirement. Adequate storage space has been identified in the Plot Plan to cater this requirement.

52. Volume II Part A- General Technical Requirement

5.6.12 DM water consumption

Make-up water shall be evaluated based on actual DM water make-up required for the station for 15 days while maintaining the boiler steam quality at recommended levels. Percentage of DM water

The quality of DM makeup water cannot be guaranteed for 15 days. DM water storage will be designed to satisfy the requirement of water consumption for one maximum boiler start-up, or the 2h~3h steam

Bidder to comply with specification requirement



of 59

Sundar Volume II Part B- Section B1 - Mech Technical Specification Schedule

11 Plant Water System

consumption shall be computed based on average percentage of throttle steam flow during the test period of 15 days. For the purpose of tests unit load shall be maintained between 60% and 100% of rated values. DM Water Storage Tank No Two (2) Total Storage Capacity 500 m3 or system requirement, whichever is higher.

flow in BMCR.

53. Volume II Part A- General Technical Requirement Sundar Volume II

5.6.1.3 Unit Auxiliary Power Consumption 10.3 Induced Draft Cooling Tower

The auxiliary power consumption for all the equipment and system covered under the scope of this contract that are required for continuous unit operation a t 100% TMCR, 80% TMCR, and 60% TMCR load under rated steam conditions at condenser pressure of 0.1 Kg/cm2 (abs) with 0% make-up and with ambient air temperature of 27 °C & RH of 60% while firing performance coal shall be guaranteed.

Design ambient wet bulb temp.(℃) 28.0 (including recirculation allowance - 0.5 )

With ambient air temperature of 27 °C & RH of 60%, the wet bulb temperature is 21.3°C. Please confirm the design wet bulb temperature of cooing tower is 21.3°C or 28°C.

Wet bulb temperature of 28 ℃ shall be considered for design and guarantee of cooling Tower.



of 59

Part B- Section B1 - Mech Technical Specification Schedule

54. Volume II Part B - Section A Civil

11.6 C.W. Ducts

CW ducts from C.W. pump house up to condensers and from condensers up to cooling towers shall be steel pipe encased in concrete.

Bidder clarify that CW duct should be steel pipe encased in epoxy resin, which is more corrosive resistant and easier to construct.

Bidder to comply with technical specification. However Bidder may bring this proposal as deviation with price of withdrawal for this deviation.

4.ELECTRICAL

55. Volume II- Part A- General Technical Requirement Sundar

3.2.2.2

Generator Main

Connections

One (1) set of isolated

three-phase bus duct from

generator phase

terminals/phase

segregated terminal adaptor

box to the generator circuit

breaker and from generator

Circuit breaker terminals to

generator transformer terminals

with current transformers.

For a 55MW power unit, SEPCOIII recommend SPB or NSPB for generator main connections

For Generator main connections please use isolated Phase duct.


3.2.2.16 132kV Transmission Line

4.7 km long 132kV double circuit line with ‘RAIL’ conductor. The transmission line shall run from the outdoor gantry of the 132kV Switchyard at the Power Plant to the outdoor gantry of the 132kV switchyard at the Sunder Industrial estate. The length is indicative and the actual route length will be determined by the

Please provide the location of the sunder Industrial estate substation.

It is located within the Sundar Industrial estate.



of 59

EPC Contractor through detailed survey.

57. VolumeII-C Electrical Technical Specification

1.4.1 AC Auxiliary Power Distribution System

2 Low Voltage Power 3-Phase,4-wire 50Hz solidly earthed 3 Low Voltage Emergency Power supply 400V(±10%), 3-Phase,3-wire,50Hz, unearthed

SEPCOIII recommend LV emergency power supply 3-ph,4-wires same as LV normal power supply system.

The LV emergency POWER SUPPLY is derived from the emergency DG which is 3 wire source. Hence, all emergency consumers shall be 3 phase, 3 wire


3.3.1 Generator Circuit Breaker (GCB)

The circuit breaker (CB) shall be three single-pole, sulphur hexaflouride (SF6) type.

SEPCOIII recommend vacuum type circuit breaker used for GCB.

Bidder bring this proposal as deviation with price of withdrawal for this deviation. Decision shall be taken during post bid discussion.


6.3.1 Construction features

The switchgear enclosure shall conform to the degree of protection IP-43.The LV compartment shall conform to IP-52.

The MV switchboard will be located in a clean room, degree of protection IP41 is enough.

Please follow the specified Degrees of protection

60. Volume IV Drawings

3. MMD-345023-C-DR-02-00-0003-Borehole Location Layout

In this drawing, the generator transformers and auxiliary transformers are located in the switchyard, SEPCOIII recommend remove these transformers to the front of steam turbine hall.

Please refer Plot Plan MMD-345023-z-DR-02-00-0002 for location of transformer. Bidder’s proposal meets the requirement.


1.4.3 DC supply system

Each set comprises 2x100% batteries, 2 x 100% float-cum-Boost-charger and one DC distribution board.

Further, distribution of DC system

shall be through a number of fuse

boards being distributed in various

areas.

1. Rated 55MW generator is so small, each set comprises 1x100% batteries, 1 x 100% float-cum-Boost-charger and one DC distribution board is safe and reliable enough and this scheme comply with Chinese standards and is successful in many engineering practice. Please confirm. 2. Please confirm that DC breaker boards can be used instead of fuse

1. Please follow the specification requirements. 2. Can be reviewed at detail engineering stage.



of 59

boards as alternative.


1.7 System Control, Metering and Protection

The protection of the major electrical equipment i.e., generator, generator transformer, unit auxiliary transformers, station auxiliary transformers shall be effected through redundant (2 x 100%) numerical/Microprocessor based Digital Protection Relays.

As per Chinese standards, Protection of rated and above 100MW generator with generator transformer, Protection of rated and above 220kV transformers shall be effected through redundant (2x100%) numerical/Microprocessor based Digital Protection Relays. Please allow us supply 1x100% numerical/microprocessor based digital protection relay for this project 55MW generator, generator transformer, unit auxiliary transformers, station auxiliary transformers. This scheme is safe and reliable enough and successful in many engineering practice. Please confirm.

Please follow the specification requirements.


6.3.1.7 Relays Auxiliary transformer buchholz protection and winding temperature initiated trip/alarm shall be interfaced with the numerical protection relays.

Bidder understands this clause requirement is applicable only for oil filled transformers, not for dry transformers. Please confirm.

Dry type Transformers shall not have buchholz relay but are to be provided with Winding temperature detector.


6.3.1.20 AC and DC power supply

The following power supplies shall be made available to each switchgear: a. AC supply : 400V Single Feeder b. DC supply : 220V Double Feeder Isolating switch fuse units shall be provided at each switchgear for the incoming supplies, 4-pole, single throw for AC and 2-pole, double throw for DC Moulded case circuit breaker (MCCB) shall also be

For avoiding circular current produce, it is not permit two DC power parallel in DC end distribution board, so please allow us supply single 220V DC supply feeder and use MCCB as an alternative instead of isolating switch fuse unit.

Double throw is specified to not permit DC powers supply paralleling. Hence no change is needed.



of 59

accepted as an alternative for AC circuit only.


6.3.1.23 Auto bus transfer (ABT) panel

Panel enclosure shall be fabricated from 2 mm thick sheet steel and the same shall be IP 52 protected.

Because ABT panel is placed in a neat room, for make well heat emission, Please allow us use IP32 instead of IP52.

IP42 may be acceptable in Air conditioned room ie Equipment room


7.3.1.10 Measuring instruments

For incomers to PCC/PMCCs and Air Circuit Breaker operated outgoing feeders Digital Multi-function meters with communication facility with DDCMIS system shall be provided. Digital Multifunction meters shall be of accuracy class 0.5 for incomers and 1.0 for outgoing feeders. Transducers shall be provided in MCC/ACDBs to display voltage/current/power values on DDCMIS. Transducers shall be DC operated and shall have dual output signal wired to DDCMIS/remote panel.

Since MCC/ACDBs equipment is not as important as PCC/PMCCs, it is not necessary to provide transducers in MCC/ACDBs to display voltage/current/power values on DDCMIS. Please allow us provided Voltage meter, current meter in MCC/ACDBs for local monitoring as per design requirement.

To be decided during detail engineering.


7.3.1.21 AC and DC auxiliary power supplies

Necessary 400/230V AC and 220V DC power supplies as required for control and service shall be arranged inside the Switchgear. Single supply shall be arranged for AC supply and duplicate feeder shall be arranged for DC supply.

Please allow us supply single 220V DC supply, reason see item 4.5.

Refer our reply as above at 4.10

68. VolumeII-C Electrical Technical

8.3.1 Construction features

The Back-up Control Panel and the Relay Panels shall be totally enclosed, floor mounted, free-standing, dead-front

Because relay panels is placed in a neat room, for make well heat emission, please allow us use IP32 instead of IP52.

Refer our reply at 4.11



of 59

Specification

assemblies conforming to IP-52 degree of protection.


8.3.1.13 Relays The design of the integrated generator protection and transformer protection shall be based on numerical techniques. 2x100% integrated numerical protection along with other standard protections shall be provided. Separate numerical relay shall be provided for overall differential protection (87OA) of generator, generator transformer, unit transformers and station transformer.

Please allow us supply 1x100% numerical/microprocessor based digital protection relay for 55MW generator with generator transformer of this project. Reason please see item 4.2

Please follow the specification requirements.


9.2.2.3 Float-cum-boost charger (SCR Control)

The triggering of the thyristors is controlled by electronic voltage/current regulator unit which senses feedback from both output voltage and current.

Please allow us use high speed switch IGBT type charger instead of thyristors type charger.

Accepted.

71. 00. Drawing List for 2x55 MW Lahore

MMD-345023-E-DR-02-00-0002 SLD Generator, GT, UT, ST, Metering & Protection MMD-345023-E-DR-02-00-0003 SLD Metering and Protection Scheme for 132kV GIS MMD-345023-E-DR-02-00-0004 Functional Block Diagram of 220V DC Power Supply MMD-345023-CI-DR-02-XX-0002 Single Line Diagram for UPS

These drawing is missing, please offer if any.

Already provided to the prequalified bidders.

72. Volume II Part B Section D

7.1 General Requirements

The Bidder shall furnish separate parallel redundant industrial grade UPS System for DDCMIS Package

Since 55MW is a small generator, for reduce project investment, we suggest single UPS system instead

Please follow the specification requirement



of 59

-Technical Specification for C&I

UPS system shall be separate for each unit.

of parallel redundant UPS system. Please confirm.

73. Volume II- Part A- General Technical Requirement Sundar.pdf

Page-27 3.2.2.2 Generator Main Connections One (1) set Generator Circuit Breaker (GCB)

The GCB is not required for this small unit, the startup power will be from the station auxiliary transformer.


74. VolumeII-C Electrical Technical Specification-Lahore_Final-31 Jan 2015.pdf

Page-1 1.2 Environmental Conditions

The equipment shall be installed in hot, humid and tropical atmosphere. Unless otherwise specified all electrical equipment shall be designed for continuous operation. Design ambient for all electrical equipment installed indoors, shall be taken as 50

OC.

The maximum temperature is 41.8

OC. So the electrical equipment

installed indoors shall be taken as 40

OC, and 45

OC for outdoor.



Page-3 1.4.2 Emergency Power supply

System

Diesel Generator (DG) sets shall be

provided to supply emergency

power to the plant.

According to Chinese standards and experience, the DG will only be provided for the unit more than 200MW. There will no DG for this project.

Please follow the specification requirement.


Page-179 17.10.3 Dead-end, Angle, three

post, self-supporting with Tension

Strings

Dead-end tower of 132kV will be made of angle and steel pole? The tower section will be triangle? As bellow

Noted.



of 59


Page-185 17.11.1.1 Shop test on Tower

In addition to material tests and

inspections identified in the

approved QAP, Prototype Towers

shall be full scale load tested (Type

test) at a reputable tower testing

facility. The testing shall be

conducted on the tallest towers of

each type.

This transmission line is only about 4.7 km, and there would be about fifteen towers in total, but there are four tower type. Prototype Towers shall be full scale load tested, so In my opinion there would be four towers which need a full-scale load test according to IEC 60652 Loading Tests on Overhead Line Towers. Please conform.

Noted.

5.C&I

78. Volume II-

Part B

Section D

-

Technical

Specificati

on for

C&I.pdf

4.2.6.2

Redundancy in

Input/output

Modules

(1)Hot standby 100% redundancy

shall be provided for all input/output

cards where inputs/outputs are

used for critical loops like Steam

Drum level control, main steam

temp Control, feed water flow

control, Turbine bypass control,

furnace draft control and

combustion control etc. DO cards

shall be redundant for each HT

(1)The DCS will have redundancy in

following levels – Main processor,

Network interface module,

communication cable and power

supply.

For important signal, the

instruments will be triple or dual

redundancy, and these redundant

signals will be sent to different I/O

modules of DCS. Any one of

Bidder to comply with the tender specification.



of 59

drive and critical LT drives, as

applicable to the plant.

(3)Wherever redundant sensors are

employed each sensor shall be

wired to redundant input modules

so that even if one input module

fails,the signal will be available from

the other input module.

redundant I/O module fails, other

signals resident un-failure I/O

module can also be used.

So the redundancy I/O module will

not be provided.

(2) DO cards will not be redundant.

(3)For redundant sensors, each

sensor will be wired to different I/O

modules(one sensor to one input

module, not one sensor to two or

three input module). Even if one

input module fails, other signals will

be available from the other input

module.

79. Volume II-

Part B

Section D

-

Technical

Specificati

on for

C&I.pdf

4.2.17.1

Electro-Hydrauli

c Governor

Control

Alternative – I

Alternative – II

Steam Turbine Generator Control

System will be provided as per

turbine manufacture standard

design.

Bidder’s response not clear with respect to which type of alternative proposed in the specification is applicable for the bidders provided steam turbine.

80. Volume II-

Part B

Section D

-

Technical

4.2.17.2

Turbine

Protection

System (TPS)

(c) ........ The trip coils shall be

monitored continuously for

healthiness and failure shall be

alarmed.

According to the turbine

manufacturer’s design, for the

solenoid valve, the state of the trip

coils cannot be monitored, and the

state of the solenoid valve will be

Bidder to comply with the tender specification however this shall be evaluated during bid evaluation.



of 59

Specificati

on for

C&I.pdf

monitored. The power supply status

can be monitored continuously.

81. Volume II-

Part B

Section D

-

Technical

Specificati

on for

C&I.pdf

4.2.17.3

Turbine

Supervisory

System (TSS)

ii) Absolute as well as relative

shaft vibration measurement, of

each bearing in both X and Y

direction (both for Turbine and

Generator bearing).

v) Absolute bearing vibration

measurement of each bearing in

both X and Y directions (both for

turbine and generator bearings).

vi) Stator winding vibration

measurement in radial and

tangential directions.

vii) Axial shift of the rotor, (three

sensors).

As per the turbine manufacture's

design,

ii) the shaft absolute vibration will

not be provided, only provided the

X/Y direction for shaft relative

vibration.

v) Absolute bearing vibration

measurement of each bearing in

vertical directions (both for turbine

and generator bearings).

vi) Stator winding vibration

measurement will not be provided.

vii) Axial shift of the rotor, two or

three sensors, different

manufacture has different design for

the number of axial shift sensor.

Bidder to comply with the tender specification

82. Volume II-

Part B

Section D

-

Technical

Specificati

on for

C&I.pdf

4.2.21 PLC

Configuration

The complete MIS system including

hardware, software, cables etc, as

required shall be provided.

There is not detailed function

description for MIS in owner's

tender document, please provide.

So that bidder can consider this

system.

The functional description of MIS is attached in Annexure I



of 59

83. Volume II-

Part B

Section D

-

Technical

Specificati

on for

C&I.pdf

4.5 Vibration

Monitoring for

HT Motors

Vibration monitoring for all HT

motors and its associated pumps,

fans, drives etc. for X, Y and Key

Phasor ......

Vibration monitoring for most HT

motors and its associated pumps,

fans, drives etc, will be provided,

the detailed rotation device list

which will be provided the vibration

measuring will be submitted to

owner for reviewing.

Noted.

84. Volume II-

Part B

Section D

-

Technical

Specificati

on for

C&I.pdf

6.1.3

Termination/Mar

shalling

Cabinets and

Interposing

Relay Panels

Marshalling/Termination cabinets

for the system shall be supplied as

part of DDCMIS/PLC

cabinets/panels for terminating

all cables originating from the

field, MCC/SWGR or any other

source of signal and for

distributing the signals to different

functional panels and cubicles.

I/O cards and terminals will be

integrated in one cabinet, no

dedicated Marshalling/Termination

cabinets to be provided.

Noted.

85. Volume II-

Part B

Section D

-

Technical

Specificati

on for

C&I.pdf

13.5 Ambient Air

Quality

Monitoring

(AAQMS

AAQMS shall include monitoring of

the following pollutant

gases/parameters. However, any

other gases/parameters

recommended by relevant central

and state regulatory agencies shall

also be provided.

Method of measurements and

standards shall be as per pollution

control boards (PCBs) norms.

Please provide the PCB norms for

bidder reference,

As per EIA already supplied to the prequalified bidders as part of feasibility study report.



of 59

There shall not be any cost

implication for the same to Owner

86. Volume II-

Part B

Section D

-

Technical

Specificati

on for

C&I.pdf

8.7.1.2 Control

Cables

Solenoid valve Power supply cables

shall be minimum 2.5sq.mm

Solenoid valve Power supply cables

shall be maximum 1.5sq.mm due to

the lower voltage and current.

Bidder to comply with the tender specification

6.CIVIL

87. Volume

II-partB

Section A Civil 2.2.1 b) All foundations shall be

designed in accordance with

provisions of the relevant parts of

the latest revisions of British

Standards.

2.2.3 Pile Foundations: Type and

size of the Pile foundation shall be

based on the recommendation in

detailed geotechnical investigation

report and subsequent established

by initial pile load test at site and

shall be designed as per relevant

part of American and British

standards.

3.6 Basic Design Concepts for

Design of Structural Steel Work:

According to the tender document,

the bidder will make overall design

according to American standard.

Please clarify.

Refer Clause 1.1 – Last Paragraph



of 59

Structural steel design shall be

carried out as per structural steel

design code AISC 12th Edition,

BS 5950 and other relevant code

unless noted otherwise.

3.8 Codes & Standards: The

engineering & execution of all Civil,

Structural & Architectural works

shall be based on the latest edition

or revision of the applicable portion

of the following Codes and

Specifications. List of some of

applicable codes and standards are

given in Appendix-A for ready

reference. In case any particular

aspect of work is not covered by

those Standards, other standard

specifications, as may be specified

by the Engineer, shall be followed.

d) American Codes and standards

(ASTM, ACI,)

88. Volume II-partB

Section A Civil 3.4.18 Seismic Load

The project site is in Zone – IIA as

per Pakistan seismic code.

According to the Pakistan seismic code, the earthquake acceleration (PGA) of Zone-IIA is range of 0.08g~0.16g. Please provide the accurate earthquake acceleration (PGA) in this project area.

0.16g shall be used.



of 59

89. Please clarify: Can Chinese steel materials be used for steel structures?

Steel materials confirming to British and American code shall be used.

90. Volume

П-Part

B-Section

A Civil

P55-10.3

P59-11.1

Superstructure of Pump house shall

be of RCC with brick cladding./The

superstructure of all pump houses

shall consist of structural steel

frames, side metal sheet cladding

and RCC roof over permanent

shuttering desk sheets.

The documents have a different

description of structure form for the

pump house, whether the

superstructure of pump house can

use steel structure uniformly.

Please follow the stipulation of technical specification

91. Volume П-Part B-Section A Civil

P74-12.3.2.3 The following factors of safety shall be considered for stability of foundation and underground structures. Stability against uplift : 1.25

According to the American or BS code, Ring plate type foundation dose not allow to produce uplift force in the working load combination and allow uplift of ring plate foundation which central angle is less than 30 degrees under the computational load combination. So we think the coefficient of uplift is enough which is 1.2.



P76-14.1.5 These shall be of RCC construction, water tight and above ground.

Please consider using steel water tank.



P78-15.3 The ash dyke height shall be designed and constructed considering design life of power plant as 30 years.

Considering the demand and cost in the prior period, Whether primary dam can design according to the amount of ash storage for 3~5 years? Later can increase the height of dam to meet the future requirement. Please confirm.

Ash dyke height shall be 6 m including 750 mm free board.

94. Volume П-Part B-Section

P79-15.6 No protection is required 1m below FBL for for U/S slope since it will be submerged under water/ash most of

Please consider protection measures of whole U/S slope.

Bidder’s proposal if superior to specification requirement shall be considered.



of 59

A Civil the time.

95. Volume II

- Part -

Section A

Civil

17.5 Work Shop It shall be of RCC structure with

steel truss framing with brick

cladding and roof metal decking

with minimum built up of 2000 m2.

We think the area is large. We

suggest area may be 1000 m2 and

it is enough. Please confirm.


96. Volume II - Part B - Section A Civil

17.6 Permanent Stores

Permanent Stores shall be of RCC

framed structure with brick cladding

with minimum built up of 2000 m2.

We think the area is large. We

suggest area may be 1000 m2 and

it is enough. Please confirm.


97. Volume II - Part A-General Technical Requirement Sundar Volume II - Part B - Section A Civil

1.6 Geology Appendix-B. Details of Boreholes

As per soil investigation report of

Sunder, Lahore project site, soil is

having minimum bearing capacity of

around 15.0 T/sq.m at a depth of

3.0 m.

According to the soil profiles, the

value of SPT is larger than 30 at a

depth of 3.0m.Therefore, it can be

envisaged that the bearing capacity

should be more than 15.0 T/sq.m at

3m depth. Please confirm the same

and provide a final value for design.

Refer Appendix B – 2nd last Paragraph - last line.

7.HVAC


19 of 222 1.4 Climate

The major Meteorological data from

the nearest meteorological station is

as follows:

Table 1.1: Meteorological Data

Parameter Values

The data quoted in the left is not

applicable for HVAC system design,

The following data might be

considered to be taken as outdoor

design conditions of HVAC system

during the tendering phase, please

Bidders understanding regarding

use of ASHRE, Metrological data for

HVAC system design is correct. Any

site specific data that is more

stringent than ASHRE Metrological



of 59

Monthly Mean Maximum

Temperature °C 41.8

Monthly Mean Minimum

Temperature °C 6.9

Average Annual Rainfall mm 288

Recorded in July 2010

Maximum ambient humidity % 100

Average Relative Humidity over 4

years % 70

confirm

(Quoted from ASHRAE ,

Meteorological data of LAHORE city

which latitude is31.52N and

longitude is 74.40E):

1) Dry-bulb temperature

corresponding to 0.4% /1%annual

cumulative frequency of occurrence

（warm conditions） and mean

coincident wet-bulb temperature；

43.2°C/23.2°C, 41.8°C/23.5°C,

2 ） Dry-bulb temperature

corresponding to 99.6% /99% annual cumulative frequency of occurrence and outdoor design

relative humidity（cold conditions）3.9°C /5.0°C

3) Evaporation wet-bulb temperature corresponding to 0.4% /1%annual cumulative frequency of occurrence and mean coincident

dry-bulb temperature ；42.3°C/34.2°C, 28.7°C/33.6°C,

Please provide extreme (maximum and minimum) temperatures used for HVAC system design.

data shall also be considered.

99. Volume II-Part B- Section

176 of 235 15.1.1.2 Water Cooled Packaged

Units

The ESP cum VFD Control Buildings and fly Ash Equipment Building Control room are far away

Water cooled air-conditioning

system has been considered due to



of 59

B-Mech Specification

Water Cooled Packaged Units

(Precision Type) shall be provided

for air conditioning of the ESP cum

VFD Control room in ESP cum VFD

Control Buildings. No separate

cooling tower have been envisaged

for this system. Condenser cooling

water shall be supplied to these

buildings

from the ACW system

Water Cooled Packaged Units

(Precision Type) shall be used for

air conditioning of the Fly Ash

Equipment Building Control room

(One No. common for both the

units). Water for condenser cooling

of such PAC units shall be tapped

from ACW supply system. Hot water

after condenser cooling shall be

returned to the ACW return line for

its cooling in the Main Cooling

Towers of the Power Station.

from central refrigeration station and considering simplifying the system and convenience for operation and maintenance, we consider that air cooled air conditioner shall be provided for these rooms, please confirm.

better efficiency, more stable

cooling in extreme hot condition,

and relatively high heat load in the

ESP cum VFD control room

building.


requirement.


183 of 235 15.4.2 Ventilation System

For all the mechanically ventilated

areas, the supply air fans/louvers,

filters and exhaust air fans/roof

extractors or combination shall be

According to ASHRAE, The dry

ventilation system for each area

shall be sized based on a maximum

room temperature of 6°C

(maximum) above design ambient

Comply with specification

requirement. The requirement is

aligned with high ambient

temperature during summer



of 59

provided as required. The

ventilation system for each area

shall be sized based on a maximum

room temperature of 3°C

(maximum) above design

ambient temperature during

summer considering all heat loads

or 10 (ten) air change rate/hour (for

general areas) and 15 (fifteen) air

change rate /hour (for battery

rooms), whichever is higher.

temperature during summer

considering all heat loads or 10

(ten) air change rate/hour (for

general areas) and 15 (fifteen) air

change rate /hour (for battery

rooms), whichever is higher.

The relative humidity is not controlled

months.

101. Volume II-Part B- Section B1 - Mech Technical Specification Schedule

63 of 98 1 Temperature

Dry Bulb Temperature to be

maintained in manned area (24+

1.0) ºC

Dry Bulb Temperature to be

maintained inside the Control rooms

(22+ 1.0) ºC

2 Relative Humidity

Max Relative Humidity As per site

requirement

Min Relative Humidity As per site

requirement

Relative Humidity to be maintained

inside of building 50% ± 5%

According to ASHRAE, center

control room and Electronic

equipment room will be maintained

constant temperature as follows:

Summer Temperature 24±1°C

Winter Temperature 22±1°C, the

humidity shall be maintained at

30%~65%;

Local control rooms, Offices and

personnel areas shall be

maintained at:21~26℃, relative

humidity is no more than 65%;

The battery room shall be

maintained at25℃, relative humidity

is not controlled.

According to electrical code IEC,

indoor condition of switchgear

Bidder understanding regarding use

of ASHRE code for design of

Air-conditioning system is correct.

Further detail shall be considered

during detail engineering.

app:ds:constant

app:ds:temperature



of 59

rooms shall be maintained at no

more than +35℃, relative humidity

is not controlled.

Please confirm.


182 of 235 15.1.2 Ventilation

Two types of ventilation system

namely evaporative cooling system

(i.e. Air washer system) and dry

mechanical system shall be

employed in various areas of the

plant for the purpose of ventilation.

The areas to be ventilated by

evaporative cooling system are as

follows:

d) Battery Room in main plant

Because the air washer system can't maintain the Battery Room

indoor temperature at 25℃, Battery Room in main plant will be provided with air conditioning system.

Bidder may provide air conditioning

system in Battery Room as per

requirement.

103. Vol 1 Bid Security With reference to "Form of Bid

Security" Item 2 (c) (ii); if bidder

fails to sign 'Contract Agreement"

the bid bond will be forfeited.

Even though we have sincerest

intentions to achieve financial

close within shortest possible time

with the support of the employer; it

will be unjust to make EPC contractor

solely responsible and liable for the

achievement of financial close.

We suggest this time limitation of 120

days for achieving financial

close shall either be removed from

It is a presumption that successful

bidder will sign contract and furnish

performance security within a

prescribed time period after

achievement of financial close which

eventually ensure accomplishment of

commercial operation date of project

during desired time period.

Therefore, clause 19.1 (c) is

imperative to ensure steadfast

adherence with time driven project

milestones including signing of



of 59

Further elaborated in ITB clause

44.1, Signing of Contract will be

subject to the achievement of

Financial Close which shall be

within 120 days from the date of

Notification of Award.

ITB 44.1.

contract and submission of

performance security .

The complete text of clause 44.1

addresses the concerns of SEPCO III

regarding financial close within 120

days and responsibility of PPDCL

for financial close. The clause 44.1 is

re-produced for clarity purposes;

Signing of Contract will be

subject to the achievement of

Financial Close which shall be

within 120 days from the date of

Notification of Award. However,

the Employer and Bidder may

mutually agree to extend the

period to achieve Financial Close.

The Employer shall fulfill all the

requirements deemed necessary

to achieve Financial Close as per

the terms and conditions

prescribed by the Financial

Institution. Upon achievement of

Financial

Close, The Employer will send

the Bidder the form of Agreement



of 59

incorporating all agreements

between the Parties.

So in the light of clause 44.1 the

following explicit conclusions

can be drawn;

1. Period for financial close can

be extended with mutual

agreement between

successful bidders and

PPDCL

2. Employer (PPDCL) takes

full responsibility to fulfill

all the requirements which

are essential to achieve

financial close such as Letter

of Interest, Generation

License, approval of tariff

from NEPRA, Letter of

Support, Power Purchase

Agreement, Implementation

Agreement and Coal Supply

Agreement.

104. ITB 14.7: The Bidder shall provide a

detailed Financial Model

Which should include the

following:

We understand that preparation of

financial model is generally the

responsibility of the Employer. In the

clarification issued on 22 May 2015,

we were referred to NEPRA's upfront

Contract will be awarded on the basis

of robust evaluation of quoted

CAPEX (EPC cost), Operational &

Maintenance services cost and

offered financing.



of 59

a) The underlying Assumptions

and Parameters as per

guidelines issued by

NEPRA.

b) CAPEX

c) Schedule of O&M Costs

d) Debt Amortization

Structure

e) Tariff Model (Levelized)

Projected Financial Statements

tariff

(NEPRA/TRF-ITTC/2013/7195-7197

) for the assumptions. We would like

to highlight here that the minimum

size of plant considered in NEPRA's

UFT is 220MW (gross) and the

assumptions given in UFT are

almost irrelevant to a 2x55MW Plant.

In such conditions it would be almost

impossible to prepare a financial

model without proper inputs and

assumptions. We request you to

kindly share the financial model of the

project with us you have prepared so

we could take further action

accordingly.

The CAPEX, O&M cost and

financing are also integral and

significant components of financial

model. Therefore, PPDCL cannot

share financial model pursuant to

principles of transparency and

relevant regulatory statutes.

However, our financial advisors will

provide guidelines and / or training to

bidders regarding conceptual

modalities of financial model.

Detailed explanation for

SEPCO III ; Financial model is an essential and

imperative document to persuasively

demonstrate the financial viability of

power project before potential

financial institutions / lenders.

Therefore, clause 14.7 on page 9 of

EPC Bidding documents Volume

1-Contractual contains requirement

to submit financial model. The

financial model should contain

following;

a) The underlying Assumptions

and Parameters as per

guidelines issued by

NEPRA.

b) CAPEX

c) Schedule of O&M

d) Debt Amortization Structure

e) A Tariff Model (Levelized)

f) Projected Financial



of 59

Statements

Explanation: The Assumptions

and Parameters as per guidelines

issued by NEPRA.

NEPRA explicitly delineate the key

parameters and assumptions in the

upfront tariff for coal fired power

plants vide its letter No.

NEPRA/TRF-ITTC/2013/7195-7197

dated 26 June 2014. The key

parameters and assumptions include;

Plant size

Site of plant

Plant specifications

Auxiliary consumption

Project cost including EPC

cost, Taxes & Duties,

Financing fee and charges,

Insurance during

construction and Interest

during construction

Construction period

Debt Equity ratio

Duration of loan period

Duration of grace period

Interest rates on loans

Duration of Tariff Period

Quality of Imported / Local



of 59

Coal; Calorific value of coal

Price of Local and Imported

Coal

Thermal efficiency

Operation and maintenance

cost

Cost of Ash Disposal

Cost of limestone

Exchange rate

Financing fee and charges

Sino sure Fee

Interest during construction

Insurance cost

Interest on working capital

Return on Equity

Explanation: CAPEX (Capital

cost)

The capital cost for coal based power

project includes cost of Main Plant

Equipment System, Boiler including

Auxiliaries, STG .& Auxiliaries,

Balance of Plant Equipment System,

Other Mechanical Equipment

System, Electrical Equipment

System and C&I, Coal Handling

Infrastructure, Engineering & Project

Management, Erection &

Commissioning, land, site



of 59

development and civil works,

transportation and evacuation cost up

to inter-connection point.

Explanation: Debt Amortization

Structure

The Debt Amortization Structure

contains information about duration

of repayment period, total amount of

debt, no of loan installments and

Debt Servicing.

Please refer to page 73 of EPC

Bidding document (Volume 1) which

contains prescribed template for debt

amortization structure.

Explanation: Tariff Model

NEPRA designed tariff model for

coal fired power projects vide its

letter No.

NEPRA/TRF-ITTC/2013/7195-7197

dated 26 June 2014. Tariff Model

establishes the selling price of

electricity to power purchaser. Tariff

model comprising of following

components

Energy Purchase Price (Rs/kWh)

Fuel cost component

Cost of Ash disposal



of 59

Cost of limestone

Variable Operation &

Maintenance cost (Local &

Foreign)

Capacity Purchase Price

(Rs/kWh)

Fixed Operation &

Maintenance cost (Local &

Foreign)

Insurance cost

Cost of working capital

Return on equity

Interest cost

Principal element of loan

installment

Explanation: Projected

financial statements

Projected financial statements

shall be prepared based on the

tariff model. The projected

financial statements include;

Statement of Financial

Position (Balance sheet)

Statement of Profit and Loss

Account

Statement of Cash Flows

105. Vol-1 Standard form Form of Bank Security (Bank

Guarantee)

On our banks request we would like to

add following as the second last

paragraph of 'Form of Bank Security',

Some banks proposed to add this

provision in the bank guarantee;

however it does not affect the intent of



of 59

"Any claim under this guarantee shall

reach our counter by the Expiry Date

after which we shall stand discharged

of our liabilities regardless of whether

this guarantee is returned to us in

original or not"

bank security, hence agreed.

106. Vol-1 Standard form Form of Bid Security Item

2 (b); (2) that in the event of;

(a) The Principal withdraws his

Bid during the period of

validity of Bid, or

(b) The Principal does not

accept the correction of his

Bid Price, pursuant to

Sub--‐ Clause 24.2 of

Instructions to Bidders, or

(c) Failure of the successful

Bidder to(i) furnish the

required Performance

Security, in accordance with

Clause 34 of Instructions to

Bidders,or

(ii) sign the proposed Contract

Agreement, in accordance with

Clause 35 of Instructions to Bidders,

ITB 24 refers to Deadline of

Submission of Bid and sub--‐ clause

24.2 don’t match the context given in

the Form of Bid Security. Please

clarify.

The bid security form included in

bidding document is a sample form

and hence it has to be read as

under:

a) Clause 24.2 is replaced by

Clause 19.6

b) Clause 34 is replaced by

Clause 45.1

c) Clause 35 is replaced by

Clause 44.1

107. Vol-1 Standard form Form of Bid Security Item

2 (c); the sub--‐ clause 2 (c) (i)

(2) that in the event of;

(a) The Principal withdraws his

The ITB clause 34 mentioned doesn't

matches the context. We understand

it should be ITB clause 45 instead of

ITB clause 34; Please confirm.

Repeated. Reply as above.



of 59

Bid during the period of

validity of Bid, or

(b) The Principal does not

accept the correction of his

Bid Price, pursuant to



Failure of the successful Bidder to

(i) furnish the required Performance

Security, in accordance with Clause

34 of Instructions to Bidders, or (ii)

sign the proposed Contract



108. Vol-1 Standard form Form of Bid Security Item 2 (c);

The sub--‐ clause 2 (c) (ii)

(2) that in the event of;

(a) the Principal withdraws his

Bid during the period of validity

of Bid, or

(b) the Principal does not accept

the correction of his Bid Price,

pursuant to



(c) failure of the successful

Bidder to

(i) furnish the required

The ITB clause 35 mentioned doesn't

matches the context. We understand

it should be ITB clause 44 instead of

ITB clause 35; Please confirm.

Repeated. Reply as above.



of 59

Performance

Security, in accordance with

Clause 34 of Instructions to

Bidders, or

(ii) sign the proposed Contract



109. Volume I, ITB, Clause 6. ITB, Clause 6. Qualification of the

Bidder;

Bids submitted by a joint venture of

two or more firms as partners shall

comply with the following

requirements:...

Volume I, ITB, Clause 14.6 Requisite

Financial Documents:

Where the bidder is a Consortium

each member of the Consortium, and

where applicable, their Parent

Companies;

Refer to Pre-Bid Clarification

Meeting, PPDCL to confirm

Consortium with joint and several

arrangement shall also be acceptable.

All the conditions of joint ventures

are applicable to the consortium.

Wherever word consortium appears

in the document, it should be

construed as joint venture.

110. Volume I, ITB, Clause 19. Bid Security;

All bids must be accompanied by a

Bid Security in the amount of USD 5

Million (Five Million) or an

equivalent amount in a freely

convertible currency in the form of a

bank guarantee form or in the form of

deposit at call from a foreign bank

duly counter guaranteed by a

Please clarify and confirm if each

member of JV/ Consortium can

submit separate Bid Bond each

complying to ITB requirements and

total value in the amount of USD 5

Million (Five Million) or an

equivalent amount in a freely

convertible currency .

No Joint Venture/consortium shall be

jointly and severally submit the bid

security



of 59

schedule bank of Pakistan of “A”

rating acceptable to Employer in

favour of Employer,

111. Volume I, PART-II:

PARTICULAR

CONDITIONS

OF

CONTRACT;

Clause 5.3 ;

Clause 5.3 ; Priority of Contract

Documents

The text of Sub-Clause 5.3 is deleted

and substituted by the following:

“Unless otherwise provided in the

Contract, the priority of the Contract

Documents shall be as follows:

1) The Contract Agreement (if

completed)

2) The Letter of Acceptance

3) The completed Letters of

Technical and Price Bids

4) Preamble to Conditions of

Contract

5) The Particular Conditions of

Contract

6) The General Conditions of

Contract

7) The priced Schedule of Prices

8) The completed Schedules to Bid

(A to L)

9) The Specifications

10) The Drawings

11) Any other document forming part

of the Contract.

Please clarify priority of following

parts of Volume I of Bidding

Documents;

a. Preamble to Schedule of Prices

b. Schedule of Prices included in

Vlume I & II;

c. Schedule M to Bid Technical

Performance Guarantees in respect of

Net Output and Net Heat Rate

d. Schedule N to Bid Schedule for the

Performance Tests to be Guaranteed

by the Contractor

e. Preamble to The Transaction

These do not have any priority

because of independent status.



of 59

112. Volume I, PART-II:

PARTICULAR

CONDITIONS

OF

CONTRACT;

Clause 8.1 ;

Clause 8.1 General Obligations:

The Contractor shall also provide all

necessary Contractor's Equipment,

superintendence, labour and except

as stated herein below, all necessary

facilities therefore including vehicles,

mobile cranes etc for Employer/

Engineer detailed below whose

changes for the period of completion

shall be included in cost of BOD

items

Please provide complete detail

including make, model and

specifications.

As per project requirements.

113. Volume I PART-II:

PARTICULAR

CONDITIONS

OF

CONTRACT;

Clause 16.5 ;

Clause16.5 Training of

Employer's/Consultant’s Staff

Volume II, Part A; General

Specifications: Clause 3.5 Training of

Owner’s Personnel

The exact details, extent and schedule

for training shall be as finalised

during detailed engineering and shall

be subject to Owner’s approval

As no scope and specifications are

included in the Bidding Documents,

we understand that Contractor will

propose based upon recommendation

of OEM / Vendor which will be

carried out immediately before

completion of O & M Contract.

Therefore, please confirm that

Training of Employer's/Consultant’s

Staff shall be part of O & M

Contract.

Not agreed.


PARTICULAR

CONDITIONS

OF

CONTRACT;

Clause 17.5

Clause 17.5 Import Permits and

Licenses & Clause 14.8

Information for Import Permits &

Licenses; “The Contractor shall

submit to the Employer in good time

such details of all Plant and

Please re-confirm that the Employer

shall arrange all Import Permits &

Licenses while Contractor will

provide necessary assistance thereof.

Employer will assist the EPC

contractor to obtain all

permit/licenses.



of 59

Contractor's Equipment to be

imported into Pakistan and identify

as to what assistance of the Employer

is required for obtaining by the

Contractor of all necessary import

permits or licenses”.

PART-II: GENERAL CONDITIONS

OF CONTRACT; Clause 17.4

Consents and Wayleaves

The Employer shall in due time

obtain or grant all consents including

permits-to-work, wayleaves and

approvals required for the Works.


PARTICULAR

CONDITIONS

OF

CONTRACT;

Clause 33.1

Clause 33.1 section "Payment

Procedures" point 9 Taxes, Duties

and Contingencies. The Employer

will re-imbrues the taxes and duties

and the contingencies at actual i.e

Import Taxes, Training of

Employer/Engineer Staff for Factory

Acceptance Tests, Escalation,

Variations and/or claims within 28

days after the Certificate of the

Contractor Invoice by the Engineer.

Part II GCC & PCC Clause 1.6

Costs, Overhead Charges and Profit

Whenever by these Conditions the

Contractor is entitled to be paid cost,

Please clarify if Employer shall also

reimburse the following

a. Local Taxation. Levies, Custom

and Import Duties

b. The Vehicles, Mobile Crane etc for

Employer / Engineer

c. Employer's Witnessing of Factory

Acceptance Tests

Please clarify reimbursement at

actual if the Employer shall

reimburse as per Vendors invoice

plus 10% EPC Contractor's admin

Charges;

Not agreed.



of 59

such cost shall be properly incurred

and shall include any overhead

charges properly allocable thereto but

not profit unless so stated. Any profit

entitlement shall be added to cost at

the percentage stated in the Preamble.

116. Volume II PART-II: 8

General

Technical

Requirements;

Clause 8.6

Clause 8.6 Owner's Responsibilities;

If requested by the Contractor, the

Owner shall use its best endeavors to

assist the Contractor

in obtaining in a timely and

expeditious manner all permits,

approvals and/or licenses necessary

for the execution of the Contract

from all local, state or national

government authorities or public

service undertakings that such

authorities or undertakings require

the Contractor or Sub-contractors or

the personnel of the Contractor or

Sub-contractors, as the case may be,

to obtain

Please confirm to arrange all all

permits, approvals and/or licenses

necessary for the execution of the

Contract from all local, state or

national government authorities or

public service undertakings.

Employer will assist the EPC

contractor to obtain all

permit/licenses.

117. Volume I Invitation to Bid All bids must be delivered to Chief

Executive Officer at 77 – Shah Jamal

Lahore, Pakistan at or before 11:30

hours, on May 6, 2015.

The submission schedule of

Financial, EPC and O & M Bids is

too tight, Please arrange extension of

the bids submission for 45 days in

order to prepare bids.

The submission schedule has

already been extended.



of 59

118. Volume I Preamble to The

Transaction

Clause 4.1.

Clause 4.1.The Sponsor will inject

25% of the total Project Cost as

Equity within the Special Purpose

Vehicle (SPV) created to execute the

operations of Power Project and will

thus be entitled to a fixed return on

Equity based on the rate approved by

NEPRA within the Tariff allowed to

the SPV. These will be carried out in

accordance with the Equity Support

Agreement. The SPV will offer

collateral in the form of project assets

& cash flows and security package

including lA, PPA and FSA).

Please clarify the tariff approved by

NEPRA for this bidding project.

Tariff petition will be filed before

NEPRA upon finalization of EPC bid

price.

119. Volume I Instruction to

Bidder,

Clause 16.3:

Clause 16.3: (ii) Plant and equipment

to be supplied from outside the

Employer's country (Schedules of

Prices: II) shall be quoted on a CIF

port-of entry. In addition, the FOB

price and import duties and taxes

shall also be indicated separately.

Please inform the relevant Pakistan

taxes policy, will this project under

custom duty exemption

Bidders are advised to refer to

Policy for Power Generation

Projects, 2002 for taxes/exemption

and Federal Bureau of Revenue

(FBR).

120. Volume I Schedule of

Prices: Steam Generator (Boiler)

Manufacturers

Foster Wheeler (Finland & USA),

Lurgi Lentjes Energietechnik

(Germany),Babcock & Wilcox

(USA),GEC Alstom Stein Industrie

(Germany), Harbin Boiler (China),

Please claify is it possible to choose the manufacturer which is not mentioned hereby.

Manufactures are indicative in nature.



of 59

Dongfang (China), Shanghai (China),

Thermax (India), BHEL (India)

IJT(India)

Steam Turbine Manufacturers

Siemens (India), Mitsubishi (Japan),

Toyo Denki (Japan), NKK (Japan)

BHEL (India), Hangzhou (China),

Nanjing (China)

121. Volume I Particular

conditions of

Contract,

Clause 16.5:

Clause 16.5: The Contractor shall

provide such facilities for the training

of such numbers of Pakistani

engineers, engineering students,

apprentices and trade apprentices on

such sections of the Works at the Site

or on the Contractor’s premises or

Contractor selected plant

manufacturer's premises and

factories, or wherever else work is in

hand, as specified or directed by the

Project Manager/Engineer.

Please clarify “such number”, the

required number of trainees. All expenses are reimbursable at

actual and hence no need to

intimate the numbers of trainee at

this stage.

122. Feasibility

Report

Section 14.1.2.1

Section 14.1.2.1 "30 year' levelised

tariff model for all 8 scenarios is

enclosed as Appendix H"

We could not find the Appendix H,

which is very important for our

financial model, please provide

Already provided.

123. Feasibility

Report

Section 8.3.8

Section 8.3.8 Table 8.10 Landed cost

of Imported Coal by Road "landed

cost with Handling & Transportation

loss 14.317 PKR/TON"

Refer Feasibility Report 8.3.8 Table

8.10 Landed cost of Imported Coal

by Rail

Which Landed cost of Imported Coal

can be applied?

Price is given in PKR and US$.



of 59

"landed cost with Handling &

Transportation loss 14.317

PKR/TON"

Refer Feasibility Report 13.2.1

Table 13.8 Coal Price

"landed coal price 132 USD/tonne for

Imported coal

124. Feasibility

Report

Section 13.2.5

Section 13.2.5 O&M expenses

"...73% of which is include under

capacity charges and remaining 23%

is included under energy charges

according to NEPRA guidelines for

upfront tariff determination"

Please check and confirm remaining

23% or remaining 27%

Please share referred "NEPRA

guidelines for upfront tariff

determination".

Available on NEPRA website.

125. Feasibility

Report

Section 13.1.10

Section 13.1.10 Preoperative

expenses "The preoperative expenses

constitutes engineering

administration, project management

and start-up cost before the plant is

put into commercial operation. The

preoperative expenses in estimated at

the rate of 4% of works cost."

Please clarify, if PPDCL Owner has

financial arrangement or its own

equity for this preoperative expenses;

no matter what method to be applied,

the capital cost of the preoperative

expenses whether or not to be

considered in the Capital EPC Cost

part of Financial Model.

As per feasibility study

126. General Water License Please clarify if PPDCL will arrange

and bear the cost of Water License.

whether there is any additional fee or

not for obtaining Water License

Yes


PARTICULAR

CONDITIONS

OF

CONTRACT;

Clause 33.1

Clause 33.1 section "Payment

Procedures" point 9 Taxes, Duties

and Contingencies. The Employer

will re-imburse the taxes and duties

and the contingencies at actual i.e

Import Taxes, Training of

Employer/Engineer Staff for Factory

Acceptance Tests, Escalation,

Variations and/or claims within 28

This detailed terms of reimbursement

of Customs duty and import duties is

not provided, so it is difficult for us

for calculate the capital cost, Please

clarify the Customs duty and import

duties rate and confirm

reimbursement method and schedule.

EPC contractors is required to adhere to the laws of Islamic Republic of Pakistan



of 59

days after the Certificate of the

Contractor Invoice by the Engineer.

Part II GCC & PCC Clause 1.6

Costs, Overhead Charges and Profit ;

Whenever by these Conditions the

Contractor is entitled to be paid cost,

such cost shall be properly incurred

and shall include any overhead

charges properly allocable thereto but

not profit unless so stated. Any profit

entitlement shall be added to cost at

the percentage stated in the Preamble.

128. Volume II Part A - Section

A1 Superceded

Schedules;

Schedule 5.9: Duties & Taxes Please clarify if" Volume II - Part

A - Section A1 Superceded

Schedules"

How is the VAT for imported

equipment in Pakistan, any tax

exemption? If no, how is the VAT

tax rate for imported equipment? Pls

kindly collect such info and share

with us.

The bidders have to obtain this

information for preparation of its bid

129. Volume II Part A - Section

A1 Superceded

Schedules;

53.2 Personnel, Taxes and Duties;

The Contractor shall be responsible

for all formalities in connection with

passports, obtaining visas, police

permits, and expenses for

customs duties, if any, related to

personal goods of foreign personnel

Please clarify if considering using visas, which kind of visa is appropriate and enable Chinese supervisors to stay for a longer time.

Visa rules of the respective country may be consulted to.



of 59

employed on the Project.


PARTICULAR

CONDITIONS

OF

CONTRACT;

Clause 17.5

Clause 17.5 Import Permits and

Licenses & Clause14.8 Information

for Import Permits & Licenses; “The

Contractor shall submit to the

Employer in good time such details

of all Plant and Contractor's

Equipment to be imported into

Pakistan and identify as to what

assistance of the Employer is

required for obtaining by the

Contractor of all necessary import

permits or licenses”.

PART-II: GENERAL CONDITIONS

OF CONTRACT; Clause 17.4

Consents and Wayleaves

The Employer shall in due time

obtain or grant all consents including

permits-to-work, wayleaves and

approvals required for the Works.

PART-II: 8 General Technical

Requirements; Clause 8.6 Owner's

Responsibilities; If requested by the

Contractor, the Owner shall use its

best endeavours to assist the

As for applying the work permits,

how is the cost and application

regulation.

PPDCL are competent Authority to

arrange all permits and approvals of

relevant Authorities, however, EPC

Contractor will provide necessary

support.

PPDCL will assist the EPC

contractor



of 59

Contractor

in obtaining in a timely and

expeditious manner all permits,

approvals and/or licenses necessary

for the execution of the Contract

from all local, state or national

government authorities or public

service undertakings that such

authorities or undertakings require

the Contractor or Sub-contractors or

the personnel of the Contractor or

Sub-contractors, as the case may be,

to obtain

131. Volume II Part A, Technical

Specifications-

General

Specification,

Clause 3.4,

Clause 3.4, Page 39. 11kV Pole

structure from where the EPC

Contractor shall tap 11kV

construction power supply

Whose scope does the transmission

lines of 11kV construction power

source belong to? Normally,

construction power center should

need two separate source providers.

It is the responsibility of EPC contractors


Specifications-

General

Specification,

Clause 1.12,

Clause 1.12, Page 3. Plant water

requirement shall be met form the

Kahna Minor that flows in front and

parallel to the plant site at a distance

of about 20m.

Whereas Refer Feasibility Report,

Clause 5.2.1, Page 15. The Bucher

Kahna water distributor has not

enough water capacity and the raw

water can be sourced from the Lahore

Branch Canal.

Please clarify where to obtain raw

water and confirm whether it has

enough water capacity.

Please clarify distances and route

plans of Bucher Kahna water

distributor and Lahore branch canal.

Please clarify and confirm that

PPDCL will obtain right of way.

Raw water source has enough water

capacity. Rout plan for water source

is available in the feasibility study.

Yes PPDCL shall obtain right of

way.



of 59

133. Volume II Part B, Section

B, Mechanical

Specifications,

Clause 6.1.3

Clause 6.1.3, Page 80. The coal in

two stockyard shall have adequate

storage for at least 30days coal

consumption. Coal stockpile height

will be of maximum 3m.

Whereas Refer Vol II, Part B, Section

B, Mechanical Specifications, Clause

6.3.1, Page 82. The capacity of coal

stockyard shall be adequate for

storing coal for 20 days maximum

continuous requirement (MCR).

Please confirm the required capacity

of coal stockyard.

Daily requirement of coal

consumption is provided in feasibility

study.


B, Mechanical

Specifications,

Clause 6.3.1

Clause 6.3.1, Page 81. Deck plate of

minimum 3.15 mm thickness shall be

provided for full length of all

conveyors.

Please define where the deck plate

will be set

It depends upon the design of the

EPC Contractor.

135. General As for the general layout drawing of

the power plant

Please provide a digital soft copy of

topographic map of the plant for the

calculation of earthwork quantity.

Please provide soft copies of Tender

Drawings and Feasibility Report.

Already provided to prequalified

bidders.

136. General As for the flood stage or inland flood

level

Please provide the floodstage or

inland flood level (P=2%) near the

site location.

Bidders are advised to consult

Metrological Department.

137. 132 KV Bus bar As for the 132kV bus bar Please provide short current

impedance of positive sequence and

zero sequence refer to the 132kV

busbar excluding equipment in this

It is provided in the feasibility study.



of 59

plant. Short term and long term

situations should both be considered.

(SB=100MVA)

138. Volume I Section 1.

Instructions to

Bidders,

Clause 14.6

Clause 14.6 ; Requisite Financial

Documents:

Latest available management

Accounts to be provided in relation

to:

a) The Bidder itself, and its ultimate

Parent Company;

b) Where the bidder is a Consortium

each member of the Consortium, and

where applicable, their Parent

Companies;

We are unclear what/which file

should be submitted.

Please give us your kind explanation

or suggestion.

The relevant clause 14.6 is explicitly

clear


Specifications-G

eneral

Specification

Clause 1.3

, Clause 1.3; There is a natural stream

flowing through the project site (as

shown in plot Plant) which will be

cut off upon acquisition and taking

over of land by PPDCL.

Clause 3.4, Storm water shall be

disposed at the nearest natural drain

identified in the area

drainage study. Diversion drain based

on area drainage study is also in the

scope of

Bidder. Terminal point shall be

existing natural drain points as

Water Course” mentioned on the plot

plan are small natural stream for

irrigation water supply to farms.

PPDCL to clarify if these natural

stream can be used for flood water

drainage.

Clause 1.3 and 3.4 are explicitly

clear.



of 59

identified based on area

drainage


Specifications-G

eneral

Specification

Clause 1.2

Refer Vol II, Part A, Technical

Specifications-General Specification,

Clause 1.2 Plant Location and Access

to Site

The proposed power plant site is

located south and alongside road on

bank of the Kahna Minor about 2 km

away from the Mull Chowk with

Latitude 31°18' 2.721" N, Longitude

74° 09' 8.465"E.

Plant location is on Mul Talib Sarai

Road which is 8ft wide asphalt road,

PPDCL to clarify if this road can be

used for access to site during

construction stage and thereafter

during O & M Stage.

Yes The EPC bidder may propose a

better option.


Specifications-G

eneral

Specification

Clause 1.2 &

Clause 3.4

Clause 1.2 Plant Location and Access

to Site

Clause 3.4 Approach road

M3 motor way located at distance of

about 10 km from the plant

Mul Talib Sarai Road from about 2

kM Mull Chawl to the Project Site

can also be used as permanent access

road for the plant, however if road

width is deemed insufficient due to

regular movement of fuel supply

trucks it has 6ft shoulders on both

sides which can be utilized for

widening of the road.

Coal supply is not the preview of

EPC Contractors.


Specifications-G

eneral

Specification,

Clause 3.4

Clause 3.4 Terminal Points , Effluent

Disposal

EPC contractor shall ensure all

effluents are treated and reused after

treatment. EPC

Contractor shall discharge treated

effluent in the nearest drain after

We suggest for effluent and sanitary

drainage from project site to Rohi

Nala which is passing about 1.5km

NW of the plant site. It seemed that

route would mostly be passing

through farm land. However, our

scope will be limited upto project site

Not agreed



of 59

doing Area Drainage Study (to be

carried out by EPC contractor).

boundary, while PPDCL to extend

from project site boundary to Rohi

Nala.


Specifications-G

eneral

Specification,

Clause 1.5

Clause 1.5; The grade level of the

total land is varying by 2m and plant

area by 1.0m. The land is sloping in

the direction from north to south

towards saline nallah at edge of the

site. This area covers mostly plane

and barren land with wide spread

patches and agriculture plants and

herbs/shrubs.

There seem significant requirement

of filling. The overall land is about

1M below road level, in addition

there are several areas even further

depressed due to soil there being

utilized at construction works in

Sundar Industrial Estate and several

bhattas (Brick Kilns) in nearby area.

The maximum depression located

was approximately 2-3M below road

level.

Please provide us updated

Topographical Surver maps and

clarify that Finshed Ground Level

will be 25 cm above Natural Ground

Level.

Upgraded topical survey is the

responsibility of the EPC Contractors


Specifications-G

eneral

Specification,

Clause 1.12

Clause 1.12 Raw Water Source

Plant water requirement shall be met

form the Kahna Minor that flows in

front and parallel to the plant site at a

distance of about 20m.

To meet the raw water requirement

during canal closure a backup

arrangement shall be made for

underground water at Kahna Minor

We suggest to use ground water only

for raw water storage which has

better quality and available

throughout the year.

Not agreed.



of 59

canal bank by installing deep bore

well pumps.

Clause 3.4, Terminal Points, Water

intake plant for drawing water from

existing canal as well as bore well

and complete subsequent system is in

the scope of Bidder. Water at canal

and ground water at bore well is the

terminal point.


Specifications-G

eneral

Specification,

Clause1.16

Clause1.16 Power Evacuation

Power Plant shall be connected with

the 132kV substation at Sunder

Industrial Estate by 4.7 km

long 132kV double circuit line with

‘RAIL’ conductor. The transmission

line shall run from the outdoor gantry

of the 132kV Switchyard at the

Power Plant to the outdoor gantry of

the 132kV switchyard at the Sunder

Industrial estate.

There is 220 KV Double Circuit

OHTL passing in the way of 132 kV

Double Circuit 132 kV OHTL from

Project Site to Industrial Estate Grid

Station. Please check with NTDC and

advise method of under crossing.

As per WAPDA existing rules and

regulations.


A,

Clause 15

Clause 15 Ash dump (Ash Dyke);

The ash dyke height shall be

designed and constructed considering

design life of power plant as 30 years

Section 7.3 (page 76) of Feasibility

report indicates that an area of 131

Acres is required for disposing ash

for 30 years. The plot plan indicates

an area of 49 acres only. Please

arrange to check and confirm.

An area of 49 acres is adequate for

ash disposal.

147. General According to the geological data,

it is hard to determine whether

No It is an EPC lump sum contract.



of 59

adverse geologic condition like

expansive soil and liquefied soil.

At present. If there are similar or

other adverse geologic

conditions in the detailed survey.

The closing cost shall be

adjusted according to the actual

project quantity.

148. General The ash yard is required to store

100% ash quantity of 30 years of the

power plant in the tender documents,

hydraulic ash removal and dry ash

removal are used for ash removal

system and the soil is not allowed to

be sampled in the ash yard.

According to the calculation, the ash

quantity of 30 years of the power

plant is approximately 3.8 million m3

and only 100% ash quantity of 5

years can be stored according to the

current site condition; If ash quantity

of 30 years of the power plant is to be

realized, over 82% ash

comprehensive utilization shall be

taken into consideration.

The scheme of soil borrow in the ash

yard can not only increase the

capacity of the ash storage volume

Please refer to ITB Clause 20.2



of 59

but also can reduce the pressure of

earthwork outsourcing.

If the ash removal system is changed

to dry ash removal, it can only

increase a part of ash storage volume

but also can reduce the dam body

earthwork.

In addition: According to the

requirement of tender documents, a

clay core wall is required to be in the

dam body with a earthwork of

approximately 70,000 m3 and the

source of part of earthwork shall be

taken into consideration.

149. General The ash removal efficiency of

electric ash removal is required to

reach 99.99% in the tender

documents and we can promise as

ash removal efficiency of 99.8%. If

50mg/Nm3 dust discharge

concentration referred to in the

requirements of tender documents is

to be satisfied, we advise to change

the electrostatic precipitation to the

electrostatic-bag precipitator.


150. General According to the requirements of

tender documents, all the waste water




of 59

treated in the plant shall be

discharged into the central control

wastewater pool (CMB) and reused

uniformly, According to the

calculation, the power plant water

supplement quantity of this scheme is

520t/h and if the waste water i reused

stepwise according to the different

drainage water quantity, the power

plant water consumption can be

reduced to save water.

151. General About the net output

2x50MW

ppdcl_consolidatedclarifications03_04062015

Documents

environment temperature

ambient air temperature

coordinates system

pa fan design

auxiliary power condition

temperature dry bulb

coordinates of grid

volume iv drawings