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![Page 1: Design and Construction of Canadian Advanced PHWRs · PDF fileDesign and Construction of Canadian Advanced PHWRs Dr. Ala Alizadeh Vice President, Marketing & Business Development Design](https://reader034.vdocument.in/reader034/viewer/2022051507/5a71eb2c7f8b9a9d538d3fc0/html5/thumbnails/1.jpg)
© Atomic Energy of Canada Limited
Design and Construction of Canadian Advanced PHWRs
Dr. Ala Alizadeh Vice President, Marketing & Business
Development
Design and Construction of Canadian Advanced PHWRs
Dr. Ala Alizadeh Vice President, Marketing & Business
Development
2009-10-272009-10-27
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© Atomic Energy of Canada Limited 2
Outline
• Introduction• CANDU Reactor Development History & Recent
Projects• New Build Initiatives in Canada• Fundamentals of CANDU Reactor Technology• Overview of Major Features of ACR-1000 Design• ACR-1000 Construction • Summary & Final Remarks
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© Atomic Energy of Canada Limited
Atomic Energy of Canada Limited
• Commercial Crown corporation, established 1952 to lead Canadian nuclear industry
• AECL is a fully integrated company: reactor designer, vendor, project management, R&D, nuclear services, refurbishment, waste management, worldwide
• Over 5000 staff
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© Atomic Energy of Canada Limited 4
CANDU: Built on a Strong History
YearsYears
900
800
700
600
500
200
100
Pow
er (M
We)
Pow
er (M
We)
900900++ MWMWee ClassClassReactorsReactors
660000++ MWMWee ClassClassReactorsReactors
1950 19701960 1980 1990 2000NRXNRX
NRUNRU
NPDNPD
Douglas PointDouglas Point
Pickering APickering A Pickering BPickering B
Bruce ABruce A Bruce BBruce B
DarlingtonDarlington
CANDUCANDU 99
Research & PrototypeResearch & PrototypeReactorsReactors
Today
RAPPRAPPSS 1,21,2
KANUPPKANUPPZEEPZEEP
ACRACRand beyondand beyond
Gentilly 2Gentilly 2 Wolsong 1Wolsong 1
Pt LepreauPt Lepreau EmbalseEmbalse
CernavodaCernavodaWolsongWolsong
2,3,42,3,4QinshanQinshan
1&21&2CANDU 6CANDU 6
Enhanced CANDU 6Enhanced CANDU 6
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India (CANDU type)13 units, 5 under construction
PakistanKANUPP 1
unit
Quebec, CanadaGentilly 1 unit
Ontario, CanadaDarlington 4 unitsPickering 6 unitsBruce 8 units
New Brunswick, CanadaPoint Lepreau 1 unitArgentinaEmbalse 1 unit
Republic of KoreaWolsong 4 units
Pickering, Canada Qinshan, China
42 CANDU Reactors Worldwide, 6 Under Construction, and 3 in Pre-project Phase = 51 reactors
RomaniaCernavoda 2 unit,
ChinaQinshan 2 units
Point Lepreau, Canada
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© Atomic Energy of Canada Limited
AECL Track Record on New Projects
In-Service Date Plant Status
1997 Wolsong Unit 2, S. Korea On budget, on schedule
1998 Wolsong Unit 3, S. Korea On budget, on schedule
1999 Wolsong Unit 4, S. Korea On budget, on schedule
2002 Qinshan Phase III, Unit 1, China On budget, 6 weeks ahead of schedule
2003Qinshan Phase III, Unit 2, China Under budget, 4 months
ahead of schedule
2007 Cernavoda Unit 2 Completion Project
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© Atomic Energy of Canada Limited
CANDU 6 Lifetime Capacity Factors
• For all CANDU 6s: 88.8%• For CANDU 6s entering service in the last
decade: 90.2%• 6 of 9 exported CANDU 6s are in global top decile
Source: COG 2009
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© Atomic Energy of Canada Limited
Nuclear power in Canada
Alberta OntarioQuebec
BritishColumbia Manitoba
Labrador & Newfoundland
New Brunswick
Saskat-chewan Nova Scotia
NWT & NunavutYukon
18 units1 unit 1 unit
Canada: world’s 6th
largest power generator: 128 GWe
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© Atomic Energy of Canada Limited
Canadian new build nuclear power markets& their drivers
Lower CO2 emissions &
phase out coal
AlbertaOntario
Quebec
BritishColumbia Manitoba
Labrador & Newfoundland
New Brunswick
Power the oilsands with lower CO2 emissions
Regional energy hub
Saskat-chewan Nova Scotia
NWT & NunavutYukon
World’s #1 uranium producer – extend nuclear
value chain9
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© Atomic Energy of Canada Limited
New Build in Ontario
• Ontario committed to phase out 7,000 MW coal fired capacity by 2014
• Infrastructure Ontario (IO) new build procurement process is on-going
• IO declared AECL proposal for 2 - 4 ACR-1000 units as the “best offer” in June 2009, with two caveats
–all offers are higher priced than IO expected–need for discussions between Canadian & Ontario
governments• Power demand drop allows more time for
development of new build program
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© Atomic Energy of Canada Limited
New Build in Alberta
• Public consultation on nuclear option is expected to be concluded in 2009
• Oil sands and electricity generation in Alberta are major carbon emitters in Canada
–carbon capture and nuclear are under study– the current oil market has slowed demand for major
expansion in the oil sands• Bruce Power Alberta is investigating a site at
White Mud–site licence application is expected once government
policy is published
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© Atomic Energy of Canada Limited
New Build in Saskatchewan
• World’s largest uranium producer• Pro-nuclear public• Political desire to extend the nuclear value
chain
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© Atomic Energy of Canada Limited
New Build in New Brunswick
• NB government plans ACR-1000 new build at Lepreau NPP site as part of its planned Regional Energy Hub development
• A private sector driven model is under consideration for markets in
–US: New England and Maine–Canada: Maritime provinces
• The current economic downturn has slowed the initiative
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© Atomic Energy of Canada Limited
CANDU: Canadian PHWR Technology
• AECL developed the design concept on which all currently commercial PHWRs are based
• CANDU = Canada Deuterium-Uranium• Key CANDU characteristics
• Pressure tubes containing fuel bundles located in cylindrical, low pressure moderator tank or “calandria”
• Heavy water moderated• Natural Uranium CANDUs are heavy water cooled• Advanced CANDU Reactor ACR-1000 is light water
cooled• 43 units based on the CANDU design operate in 7
countries
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CANDU Fuel Channel Reactor
Fuel bundle
Calandria tube
Fuel channelFuel channel
CalandriaCalandria and HTS Systemand HTS System
CalandriaCalandria (Reactor Core)(Reactor Core)
Fuelling MachineFuelling Machine
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© Atomic Energy of Canada Limited
Today’s CANDU Nuclear Power Reactors
Narural Uranium 700 MW ClassEnhanced CANDU 6
Low Enriched Uranium 1200 MW Class ACR-1000
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© Atomic Energy of Canada Limited
From Present to Future
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© Atomic Energy of Canada Limited
Advanced CANDU Reactor Products
EC6: Evolutionary Enhancements • Smallest proven design on the market• Meets current requirements, including
Generation III safety• Reference CANDU 6 design basis
maintained• Ideal platform for advanced fuels –
Recovered U & thorium
• ACR-1000: Full scope design and development
• Meets and exceeds Generation III plus requirements
• Major design simplifications• Competitive economic and operational
performance• Designed-in constructability
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© Atomic Energy of Canada Limited
Enhanced CANDU 6
• Evolution of CANDU 6 Design: • continuously improved by incorporating lessons learned
from projects, OPEX, and technology development
• Enhanced CANDU 6 – EC6• enhanced to meet today’s Gen III licensing
requirements in Canada• enhanced operability, reliability, life management• meets today’s customer expectations while
maintaining proven CANDU 6 design basis and track record
• unique fit to markets interested in medium-size units, localized fuel economics of natural uranium, and alternative and recycled fuels
“EC6 – the natural choice”
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CANDU 6: heavy water cooled ACR-1000: light water cooled
ACR-1000 Design Evolution: advanced design, a large performance gain
2 x 728 MWe 2 x 1165 MWe
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ACR-1000
Similar coolant system configuration
CANDU 6
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ACR-1000 key features
• 1165 MWe gross output• Light water cooled, heavy water
moderated• 60 year design life • Similar configuration/equipment as
CANDU 6• Load following capability• On power refuelling• Unique fuel cycle flexibility • Standard design product
ACR-1000 Reactor Building Cutaway
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On-Power Fueling Sequence
CalandriaFuelChannels
FuellingMachine
NewFuel
IrradiatedFuel
StorageBay
ReactorBuilding
Spent FuelSpent Fuel
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ACR-1000: Innovations
• Low Enriched Fuel• Light water coolant• Thicker pressure tubes• Negative coolant void reactivity• Higher thermal efficiency • Robust reactor building• Quadrant layout• Enhanced active and passive
safety
Pressure & calandria tubes
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© Atomic Energy of Canada Limited
ACR-1000: Traditional CANDU Features
• Modular, horizontal fuel channels
• Water-filled reactor vault• Reactivity mechanisms operate
in low temperature, low pressure environment
• Two independent, fast, passively driven safety shutdown systems
• Reactor building accessible foron-power maintenance
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1. Calandria Water
2. Shielding VaultWater
3. Water from ReserveWater Tank fills fuelchannels, calandria, andshielding vault by gravity
Large Passive Heat Sinks for Severe Accident Mitigation & Management
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Operations & Maintenance
• Advanced control centre• Computerized safety system
testing • Improved, long-life materials
and experience-based plant chemistry specs
• SMART CANDU diagnostics• Increased shielding in
radiologically controlled areas
SMART CANDU Diagnostics
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One 21-day outage every three years
On-Power Access to Containment for Maintenance
Quadrant Design allows On-Power Maintenance of safety related systems
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ACR-1000 Fuel
• Simple to manufacture, easy to handle
• 2.4% uniform enriched UO2
• CANFLEX 43-element bundles–10 cm dia x 50 cm long
• 20,000 MWd/te burnup–will be increased with experience
• Two Canadian fuel suppliers• Readily localized
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© Atomic Energy of Canada Limited
ACR-1000 Design Status
• Basic Engineering Program• Integrated design, licensing construction,
commissioning, operations, supporting development/qualification
• Technical and project risk management build into the program from the start
• Program has completed basic design documentation, comprehensive 3-D CADDS model, major equipment specifications, full safety case documented in PSAR
• Project Ready• Fully priced turnkey bid was submitted to Ontario in
2009• Ontario government described AECL proposal as the
“best” bid
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Licensing
• Safety and licensing driven design–oriented to CNSC’s new RD-337 requirements–meets IAEA’s NS-R-1–CNSC pre-project review identified “no fundamental
barriers to licensing ACR-1000 in Canada”• UK Generic Design Assessment Steps 1 & 2
–Joint Programme Office report in March 2008 announced
–“no impediments to licensing ACR-1000” in UK
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Technology
• Fuel and reactor operating parameters–within experience envelope of CANDU and Fugen
HWR operations to allow robust safety code verification
• Innovation risks were reviewed and assessed – light water coolant, LEU fuel, reduced lattice pitch
• R&D integrated to design process to:–confirm component designs & verify manufacturing
routes–confirm design margins for safety analysis–validate design and safety codes
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New “SMART” Technologies
DATA
INFORMATION
KNOWLEDGE
ACTION
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Supply
• Supply chain–5 CANDU new builds, 2 completions over last 15 years– refurb/life extensions include fuel channel replacements–excellent supplier performance–multiple supply sources for many key components,
including largest forgings–Exploring potential for supply from China & India
• Equipment size, type & manufacture–most core components comparable to CANDU 6 or
Darlington units
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Calandria• Largest nuclear
component• 25 mm shell
thickness• Design pressure
~1 atm• Similar size as
for CANDU 6• No very large
forgings
Supply
Calandria shell
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• Many small, identical nuclear components
– require small fabrication shops
• Example: for 2 unit plant
–1040 fuel channels–2080 end fittings
Supply
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1号机组 2号机组 3号机组 4号机组
01020304050607080
Local Content, %
Unit 1 Unit 2 Unit 3 Unit 4
CANDU Localisation
ACR-1000 has similar supply & construction localization potential
Korean experience
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© AECL 200838
Construction
• Constructability embedded in design– experienced constructors on design team
• Modularization• 200 reactor building modules• strategy developed by multi-discipline team and
reviewed with Hitachi• NSP similar to existing CANDUs
– layout, equipment size & type
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Qinshan III on-Site Modules Fabrication
Lower dome
Dousing system
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Qinshan III Modules Installation
Dousing system modules installed in 5 days vs. 120 days using old approach
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Module Implementation
Number of Reactor Building Modules per Unit
6
212
15
34
0 50 100 150 200 250
Estimated for ACR
EC 6
CANDU 6 Qinshan
CANDU 6 Wolsong
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Reactor Building Construction StrategyReactor Building Construction Strategy
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ACR-1000 RB Compartments
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Vertical Installation Compartment
• Implemented in the civil design from the start –could not be “back-fitted” to an existing
design• Creates manageable self contained work areas
–each compartment can be completed independently
• Schedule flexibility–late delivery of a module impacts only one
compartment• Reduces schedule risk by maximizing
paralleling of activities
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Internal Structure Design
• Seismically qualified• Independent from the containment wall• Vertical installation compartment concept• Pre-Fabricated Permanent Formwork (PPF)• Improve constructability of structures• Jumpform or Slipform systems
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ACR-1000 Module Sequence
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Conventional Slab Construction
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Large ACR-1000 Modules
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Feeder Header Module
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Reactor Building Cutaway
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Systems and Equipment Model
Structural Models
Smart Plant Model
CADDS – Design Integration
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© Atomic Energy of Canada Limited
AECL - OFFICIAL USE ONLY53
Fueling Machine Head
CADDS models are used to develop bill of material for complex components
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State-of-the-Art Project Technologies
• Integrated Project Management Tools–Intergraph 3D plant modelling and design–AECL’s CMMS supply chain & materials
management system–AECL’s TRAK electronic document
management system–AECL’s IntEC equipment wiring
design and management• Proven in recent “paperless”
projects
CADDS
TRAK
IntECCMMS
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FM Cable & Hose Carrier
ACR Fuelling System
CADDS Models are used extensively in manufacturing and assembly of the equipment
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Integrated Information Cycle
Design andEngineering Procurement &
Manufacturing
ConstructionCommissioning
Operate&
MaintainConceptual
DesignPlant Plant
InformationInformationAssetAsset
Reuse
ToolsToolsTools ToolsToolsTools ToolsToolsTools ToolsToolsTools ToolsToolsTools
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Summary of ACR Design
• AECL has invested significantly in the “Generic ACR Technology Development” Program for the ACR-1000
– Generic ACR program ongoing since 2000– The ACR design has undergone extensive program review to
serve as a foundation for ACR-1000 basic engineering and pre- licensing
• Activities being carried out:– Design – Licensing– Development and Testing– Supply Chain Management– Commissioning and Operations assessment
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Summary of ACR Design
• The ACR technology base is strongly established, using the successful CANDU 6 experience in construction and operation
• Significant design enhancements have been made for the benefit of the Customer:
– Safety
– Performance
– Operability
– Maintainability
– Constructability
• The ACR-1000 is ready for pre-project planning and pre- licensing
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ACR-1000 - a Gen III+ competitor
• We started with the highly competitive Gen II+ CANDU 6
– lowest installed unit cost foreign technology in China – despite being the smallest
• And achieved major cost improvements–economies of scale – 60% higher output–heavy water – 64% less/kW– thermal efficiency – 36.6% vs. 33%–simplification & system elimination–higher capacity factor
• ACR-1000 will be fully competitive with all Generation III designs