meteorological tower monitoring and data · date approved meteorological tower monitoring and data...

Approved By

Shan SundaramDate Approved

12/09/2005

Procedure Number Rev

36030-C 17Page Number

1 of 23I PI

METEOROLOGICAL TOWERMONITORING AND DATA CONTROL

PROCEDURE USAGE REQUIREMENTS- SECTIONS

Continuous Use: Procedure must be open and readily available at the work NONE

location. Follow procedure step by step unless otherwisedirected.

Reference Use: Procedure or applicable section(s) available at the work ALL

location for ready reference by person performing steps.

Information Use: Available on plant site for reference as needed. NONE

Printed October 18, 2006 at 8:37

Approved By Votl ElcrcGeeaig ln Procedure Number Rev

Shan Sundaram eio Eeri 36030-C 17Date Approved METEOROLOGICAL TOWER MONITORING AND DATA CONTROL Page Number

12/09/2005 2 of 23

[ FERENCE USE]

1.0 PURPOSE

This procedure delineates the requirements for monitoring equipment operation at theMeteorological Data Collection Center (MDCC). Technical Specification Channel CheckSurveillance on the MDCC is the responsibility of the Operations Department.

2.0 APPLICABILITY

This procedure applies to the main and backup meteorological towers at Plant Vogtle.

3.0 DESCRIPTION

3.1 The Meteorological Tower Surveillance includes both the main, 60 meters (m) tall tower,and the backup, 45 meters tall tower. The building houses the strip charts and computersystem which stores data for wind speed and wind direction at 60 m and 10 m on themain tower and 10 m on the backup tower. It also includes ambient temperature at 10 mon both the main and backup towers, delta temperature between 10 - 60 m on the maintower, dew point temperature at 10 m, and precipitation on the Met Tower rain gaugefunnel.

3.2 Data is recorded on Yokogawa Daqstation DX100 electronic data recorders; operation ofthe Daqstation DX100's can be performed using User's Manual lX5AG20-20000,Yokogawa manual IM 04LO1AO1-01E.

3.2.1 Material

a. PCMCIA PC Card Stock # 82228

b. Card Reader Stock # 82229

c. Kingston USB 2.0 PC Card

3.3 Data is stored and can be reviewed using the integrated plant computer, IPC.

3.4 Data is also stored on a personal computer stationed at the Met Tower running thesoftware application PC-Midas. PC-Midas was supplied and is supported by ABSConsulting.

3.5 Data is transferred from the PC-Midas computer to a client application, Midas-NU.Midas-NU is a software application supplied and supported by ABS Consulting and maybe used to store the meteorological data for review, editing and report generation.


Approved By


12/09/2005

i • • .................... ' . .................... .• • .... .... • ... • .. .Procedure Number RevElectric Generating Plant *APoeueNmrRv36030-C 17

,AL TOWER MONITORING AND DATA CONTROL Page Number3 of 23I

3.6

4.0

4.1

4.1.1

4.2

4.2.1

Semi-Annual Calibration of Met Tower instruments is done per I & C Procedures.

PROCEDURE

DAILY CHECKS

NOTE

Daily rainfall reading should be obtained on Monday through Friday and arenot required on weekends and holidays.

Obtain rainfall reading from the plastic rainfall cup located near the gate to the MetTower. Record indicated rainfall on a tickler card, and then empty the rainfall collectioncup;, this data is used as a comparison of the system rainfall gauge and can be discardedonce data has been compared.

WEEKLY HARDWARE CHECKS

The following activities should be performed weekly, and documented on Data Sheet 1:

NOTES

1) Notify Laboratory Supervision immediately of any unsatisfactoryconditions found during the performance of this check.

2) Time at the MDCC is recorded from the Eastern Time ZoneI.E.EST (Eastern Standard Time) for winter months and EDT(Eastern Daylight Time) for summer months.

Note the time of day (24-hour clock) that you arrived at the MDCC. There is a clocklocated on the wall that can be used if necessary.

Establish visually that the primary and backup tower guy wires and all tower instrumentsare secure.

NOTE

Deviations from these conditions can only be expected during calmor sub-threshold winds.

Establish visually that all anemometer cups on both towers are turning, and the winddirection vanes are responsive to the present wind fluctuations.

4.2.2

4.2.3

4.2.4


Approved By Gt:P Electric i t Pl.ant S Procedure Number Rev

Shan Sundaram voAe eEa **. 36030-C 17Date Approved METEOROLOGICAL TOWER MONITORING AND DATA CONTROL Page Number

12/09/2005 4 of 23

NOTE

Deviations from these conditions can only be expected duringextremely light/variable or calm winds.

4.2.5 Establish visually that the wind direction vanes on both towers are all aligned in thesame approximate direction.

4.2.6 Establish that the Met Tower rain gauge funnel is free from debris.

a. Remove the Met Tower rain gauge funnel being careful not to break theheating element power wires which are connected to the bottom of thefunnel.

b. Clear debris from the tipping buckets with without tipping. If bucket istipped during this procedure, reset pen to record on zero scale.

c. Document this maintenance occurrence on Data sheet 1.

d. If bucket tipping occurs, notify the Chemistry Met Tower specialist so thetipping can be deleted from the Midas data file.

4.2.7 Visually inspect the area within 150 yards of both towers and verify no obstructions (i.e.trees, buildings, large objects, etc.) have been introduced into the area that could causechanneling or unrepresentative aerodynamic effects on the wind field which in some waycould affect the validity of the met tower data.

4.2.8 Establish that the aspirator motors are all operational by noting that all aspirator indicatorlights in the MEB are lit. The Indicator lights should be green on the Mode controlswitch on the IND lights panel. If not green, write a condition report.

4.2.9 Verify proper operation of the YOKOGAWA DAQSTATION DX100 recorders.For each recorder:

a. Display historical data; Attachment 1 may be used as a guide.

b. Establish that the tracing pens of all the recorders are properly tracing andrecording fluctuations in wind speed, wind direction, sigma theta, precipitation,dew point temperature and temperature difference, and ensure that they areproviding a clearly legible trace. When any pen trace becomes unreadable,initiate a CR to request I&C repair this condition.


Approved By 17tI Elic G ating Plant Procedure Number Rev

Shan Sundaram vge e icJnrtg h 36030-C 17Date Approved METEOROLOGICAL TOWER MONITORING AND DATA CONTROL Page Number12/09/2005 5 of 23

NOTE

The MET tower time is to be set on eastern time zone year round.The clock should be set to EST in winter months and EDT insummer months.

c. Check the DX 100 recorder clock to verify the system is operating on the correctlocal time. If clock is incorrect by more than a few minutes, make the necessaryadjustments. All recording systems shall be correct to actual Eastern Time Zone±5 minutes. Attachment 2 details how to change the date and time displays.

d. Verify that current chart recorder data coincides with PC-MIDAS computerinformation. This verification should include delta temperature, 10m temperature,dew point, wind speed and wind direction. If any data from MIDAS does notreasonably coincide with chart recorder data, record this discrepancy in the DataSheet 2 Remarks section and initiate a condition report as appropriate.

4.3 METEOROLOGICAL DATA ACCURACY CHECKS

The following activities should be performed weekly, and documented on Data Sheet 2.

NOTE

Notify Laboratory Supervision immediately of any unsatisfactoryconditions found during the performance of this check.

4.3.1 Establish that the wind sensors are all recording similar wind speed and wind directionvalues (except for extremely light or calm wind conditions).

a. The primary and secondary wind speed and wind direction values at the sameelevations, should agree within +2 mph, and ±15' azimuth, respectively.

b. Wind speed usually increases with height. Mean wind speeds at 60-m level areunlikely to be less than those at 10 m. Acceptable speed differences between the upperand lower levels range from about 1-6 mph.

c. Mean wind direction between the lower and upper level sensors can also beexpected to vary somewhat with height. In most cases, wind direction will be shiftingclockwise as sensor height increases. Direction changes between lower and upper levelsensors normally should be no greater than about 20 degrees azimuth (except during calmconditions).


Approved By Procedure Number Rev

Shan Sundaram ýog14 Eletri ~eeam ln 36030-C 17Date Approved METEOROLOGICAL TOWER MONITORING AND DATA CONTROL Page Number

12/09/2005 6 of 23

4.3.2 Establish that the wind speed traces do not contain anomalies. Refer to the windspeedtrace examples of normal, damped, high threshold, and spiking windspeed traces inFigures 1, 2, and 3. Anomalies shall be noted and a CR initiated, if necessary.

4.3.3 Establish that the wind direction traces do not contain anomalies. Refer to the winddirection chart examples of normal, damped, square cornered, spiking, and switchingtraces in Figures 4, 5, 6, 7, and 8. Anomalies shall be noted and a Condition Reportinitiated, if necessary.

4.3.4 Establish that the temperature traces indicate a proper response to normal diurnal changesof temperature. Temperatures generally increase during the day and decrease during thenight, except during cloudy periods, or during instances of nighttime warm frontalpassages. During most cloudy days, the temperature does not vary much between dayand night. See Figure 10 for an example.

4.3.5 Establish that the temperature values recorded on both the primary and back-up towersecondary temperature systems agree within ±4'F.

4.3.6 Establish that the delta temperature trace indicates a proper response to normal diurnalchanges. It is generally positive during nighttime hours (especially when skies are clearand winds are light) and negative during daytime hours (especially between about 10:00a.m. and 4:00 p.m. on sunny days). See Figure 9 for an example.

4.3.7 Establish that the delta temperature trace does not go below the autoconvective lapse rateof -3.1°F. This lapse rate represents the minimum delta-T value the atmosphere cansupport without overturning. Readings below this limit are indicative of faultytemperature probes. The delta-T value should not go above 150F during the day timehours (10:00 am-4:00 pm). A value above 15'F may indicate an aspirator problem.

4.3.8 Establish that the 10-m dew point temperature is less than or equal to the 10-mtemperature. When the dew point temperature is equal to the temperature, relativehumidity is 100 percent and outside conditions should be cloudy and/or foggy. The dewpoint temperature cannot exceed the temperature if the instruments are properlyoperating. The dew point temperature should be within 30' of the lOm-temperature (i.e.10m T- 10m DP < 300).

4.3.9 Establish that the temperature, delta temperature, and dew point temperature traces do notexhibit high frequency fluctuations. These parameters are expected to vary slowly oversmall time increments.

4.3.10 If any wind speed and/or wind direction and/or air temperature delta T instrument on theprimary met tower is inoperable, initiate a condition report and notify the ShiftSuperintendent immediately that instrumentation required by Technical RequirementsManual 13.3.3 is OOS. The above channels are required to be operable at all times.


Approved By


12/09/2005

I ~ 4Procedure Number RevVoguei Electric Generatm, Plan30t 17I 36030-C 17MIETEOROLOGICAL TOWER MONITORING AND DATA CONTROL Page Number

1 7 of 23I 7 of23

NOTE

Operations Department is responsible for apprising the ChemistryDepartment of failed MDCC Channel Checks.

If any of the above channels are inoperable for greater than 7 days a special report mustbe prepared and submitted to the NRC within the next 10 days outlining the cause of themalfunction and the plans for restoring the channel(s) to operable status per Procedure00152-C, "Federal And State Reporting". Coordinate this reporting with the RegulatoryCompliance Department.

Complete Data Sheet 2.

DATA EVALUATION

4.3.11

5.0

5.1

5.1.2

5.1.3

5.1.4

5.2

5.2.1

METEOROLOGICAL DATA MONITORING

The Nuclear Specialist is responsible for meteorological data monitoring. He/she shallaverage the wind, temperature and humidity data over a period of at least 15 minutes foreach hour.

The basic reduced data is compiled into monthly or seasonal and annual joint frequencydistributions of wind speed and wind direction by atmosphere stability class.

Data evaluation results are utilized in the assembly of the Annual Radiological EffluentReport. Refer to Procedure 36025-C, "Annual Effluent Release Report Preparation" fordetails.

ANNUAL MET TOWER INSPECTION

On an annual basis the met tower is inspected by an outside contractor to verify verticalalignment and guy wire tension.


Approved By Pr ocedure N umberRev•• Plan t k Procur •u be Rev

Shan Sundara Elcti Geertng riza 36030-C 17Date Approved METEOROLOGICAL TOWER MONITORING AND DATA CONTROL Page Number

12/09/2005 8 of 23

6.0 REFERENCES

6.1 VEGP Technical Requirements Manual Section 13.3.3

6.2 Reg Guide 1.23 "On-Site Meteorological Programs"

6.3 ANSI/ANS/2.3-1984 "Standards for Determining Meteorological Information atNuclear Power Sites", September, 1984.

6.4 Final Safety Analysis Report, Vogtle Electric Generating Plant, Section 2.3.3,Amendment 17, July 1985

6.5 Meteorological Tower - Auto Data 10/50 Computing, Measuring And Control System -Operating And Technical Manuals. VEGP Document Control - 1X5AG20B-1-0,1X5AG20B-3-0

6.6 Yokogawa Daqstation DX1 00 User's Manual; Document Control # 1X5AG20-20000Vendor # IM 04L01 A01-01E 4th Edition;

END OF PROCEDURE TEXT


REFERENCE USE

ATTACHMENT 1

DISPLAYING HISTORICAL DATA FOR TREND REVIEW

1.0 Depress "DISP/ENTER" below screen containing data point to be reviewed.

2.0 Scroll to "Trend History" using arrow keys.

3.0 Depress "DISP/ENTER".

4.0 Scroll up or down through historical chart recordings using the arrow keys.

5.0 If desired, displayed time increments may be changed by:

a. Depress "DISP/ENTER".

b. Scroll to "Trend History" using arrow keys.

c. Depress right arrow key to reveal option window.

d. Scroll to "zoom +" to narrow the range or "zoom -" to widen range.

e. Depress "DISP/ENTER".

6.0 Return screen to active trend display by:

a. Depress "DISP/ENTER".

b. Scroll to "Trend"

c. Depress "DISP/ENTER".

Approved By E Procedure Number Rev

Shan Sundaram V t,,le Eer • en raL,,, Plu za 36030-C 17Date Approved METEOROLOGICAL TOWER MONITORING AND DATA CONTROL Page Number

12/09/2005 10 of 23

ýRFERENCE SATTACHMENT 2

CHANGING DATE / TIME SETTINGS

1.0 Open small cover plate below recorder to be updated.

2.0 Depress "MENU" button.

NOTEThe five grey buttons below the display screen will roughlylineup with corresponding options that will appear onthe screen above them.

3.0 Select "Next".

4.0 Select "#8"

5.0 Select "Input"

NOTEDate format is YY/MM/DD (Year / Month / Day)

6.0 Scroll to correct digit to replace highlighted date/time point by using arrow keys.

7.0 Depress "DISP/ ENTER" to save number. Display will automatically advance to nextdate/time point.

8.0 Repeat steps 6 and 7 until all corrections are entered. Read note below.

NOTEThe next two steps will need to be completed in such a way as tosynchronize the inputted time to the current time. To accomplish this,the minute time point will need to be set a couple of minutes into thefuture so as to capture it at the correct moment in time.

9.0 When all digits are set, scroll over and down to highlight the "ENT" point.

10.0 Depress "DISP/ ENTER" key twice to set clock to new values selected.

11.0 Depress "ESC" button.


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11 of 23I METEOROLOGICAL TOWER MONITORING AND DATA CONTROL

Sheet I of 2DATA SHEET 1

WEEKLY CHECKSMETEOROLOGICAL DATA COLLECTION CENTER

PLANT VOGTLE

Immediately Notify Laboratory Supervision of any unsatisfactory condition foundItem Activity Procedure Initials CommentsNo. Para. #1 Enter arrival time (24-hour clock). (4.2.2)

2 Have guy wires been visually inspected? (Initial if OK) (4.2.3)

3 Are anemometer cups turning? (Initial if OK or NW = No Wind) (4.2.4)

4 Are wind vanes responsive? (Initial if OK or NW = No Wind) (4.2.4)

5 Are wind vanes aligned in the same approximate direction? (Initial if OK or (4.2.5)NW = No Wind)

6 Is rain gauge free of debris? (Initial if OK) (4.2.6)

7 Have any obstructions been introduced within 150 yards of tower that (4.2.7)might affect Met. Tower data? (Initial if OK)

8 Are all aspirators operational? (Initial if OK) (4.2.8)

Comments:


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12 of 23I METEOROLOGICAL TOWER MONITORING AND DATA CONTROL

|

Sheet 2 of 2DATA SHEET 1 cont'd

WEEKLY CHECKSMETEOROLOGICAL DATA COLLECTION CENTER

PLANT VOGTLE

DAQSTATION RECORDER OPERATIONAL CHECKS

Item Proc. 10M 60 M 10M 60M 10M 10M 60 to 10 M Dew Rain

No. Para. # Wind Wind Wind Wind Sigma Temp Delta T PointSpeed Speed Direction Direction Theta

9 Are chart traces properly recording 4.2.9 bfluctuations?(Yes - No)

10 Are the chart traces legible? (Yes - No) 4.2.9 b

11 Is the Time setting on all recorders within 4.2.9 c± 5 minutes of actual Eastern Time Zone(Yes - No)

12 Does DAQSTATION data reasonably 4.2.9 dagree with PC-MIDAS data?

Item Proc. 10M 10M 10M 10M

No. Para. # Backup Backup Backup BackupWind Wind Sigma TempSpeed Direction Theta

13 Are chart traces properly recording 4.2.9 bfluctuations?(Yes - No)

14 Are the chart traces legible? (Yes - No) 4.2.9 b

15 Is the Time setting on all recorders within 4.2.9 c± 5 minutes of actual Eastern Time Zone(Yes - No)

16 Does DAQSTATION data reasonably 4.2.9 dagree with PC-MIDAS data?

Performed By: Date: / /

Date: / /Reviewed By:


Approved By


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13 of 23METEORULOGICAL TOWER MONITORING AND DATA CONTROL

Sheet I of IDATA SHEET 2

WEEKLY DATA COMPARISON CHECKSMETEOROLOGICAL DATA COLLECTION CENTER

PLANT VOGTLE

Item Activity Procedure Initials Comments

No. Para. # Yes/No

1 Do primary and back-up tower wind speed differences at 10-m amount to more 4.3.1 athan 2 mph? (YES or NO)

2 Do Primary and back-up wind direction differences at 10-m amount to more than 15 4.3.1 adegrees azimuth? (Yes - No) If YES, Log Values

3 Is 60-m wind speed greater than 10-m wind speed? (YES or NO, If NO log both 4.3.1 bwind speed values)

4 Is 60-m wind direction azimuth similar (±20') to 10-m wind direction azimuth? (Initial 4.3.1 cif OK)

5 Is there evidence of an anomalous trace on wind speed and wind direction charts? 4.3.2 /(Yes - No) 4.3.3

6 Are temperature ranges over the last 24 hours reflective of normal diurnal 4.3.4changes? (Yes - No)

7 Do primary and back-up tower temperatures at the same level agree within 40F? 4.3.5(Yes - No)

8 Are delta temperature ranges over the last 24 hours reflective of normal diurnal 4.3.6changes? (Yes - No)

9 Is the primary tower delta temperature reading above the autoconvective lapse rate 4.3.7of -3.1 'F and/or is the delta temperature below 15'F? (Yes - No)

10 Is 10-m dew point temperature less than or equal to 10-m temperature for either 4.3.8tower? (and is it within 30°F of the 10m temp? Yes - No) If NO log both values.

11 Establish that the temperature, delta temperature, and dew point temperature 4.3.9traces do not exhibit high frequency fluctuations. These parameters are expectedto vary slowly over small time increments.

Performed By: Date: / /

PsaviplAri Rv-rjfe I - I


METEOROLOGICAL TOWER MONITORING AND DATA CONTROL

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=f_ 4P-i_.,ý 10 -f-fiv

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1

Wind Speed-Spiking or High Threshold(Possible Sticking Bearings)

FIGURE 1


Approved By i f1•g.i. •E.r ,-Gener• iii-ig•.ang Procedure.Number Rev

Shan Sundaram P lan A 36030-C 17Date Approved METEOROLOGICAL TOWER MONITORING AND DATA CONTROL Page Number12/09/2005 15 of 23

ii!!!:ilil5

30

5 25

ST R A C E . .• .: ... . . .. . . .. . . . T R A C E .

Wind Speed-Damped or Threshold Off-Zero

FIGURE 2


METEUROLOGICAL TOWER MONITORING AND DATA CONTROL

Wind Speed-Normal

FIGURE 3


1 '

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117 I-f')2I METEOROLOGICAL TOWER MONITORING AND DATA CONTROL

S a r< r> ! • C .

Wind Direction-Damped(Possible Bearing Seizure)

Figure 4


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36030-C 17Page NumberI METEOROLOGICAL TOWER MONITORING AND DATA CONTROL

18 1of23

6

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if 00A

Wind Direction-Square Corner(Possible Bearing Sticking)

FIGURE 5

rPrnnted October 18, 2006 at 8:37

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.19 of 23I METEOROLOGICAL TOWER MONITORING AND DATA CONTROL

Wind Direction-Spiking(Electronic Problem or Needs Cleaning)

FIGURE 6


U7,

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20 of 23METEOROLOGICAL TOWER MONITORING AND DATA CONTROL

Wind Direction-Switching(Normal)

FIGURE 7


METEOROLOGICAL TOWER MONITORING AND DATA CONTROL

Wind Direction-Normal

FIGURE 8


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22 of 23ME'I'EU{OLOGICAL TOWER MONITORING AND DATA CONTROL

A

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SUNRISE SUNSET

Typical Diurnal Temperature Cycle

FIGURE 9


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23 of 23IIVIEIEUKOLUUICAL TOWER MONITORING AND DATA CONTROL

U-•:

U.' :i

Typical Diurnal Delta Temperature Cycle

FIGURE 10


meteorological tower monitoring and data · date approved meteorological tower monitoring and data...

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