ML20053C192

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Monthly Operating Repts for Apr 1982
ML20053C192
Person / Time
Site: North Anna  Dominion icon.png
Issue date: 05/14/1982
From: Cartwright W
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML20053C183 List:
References
NUDOCS 8206010562
Download: ML20053C192 (8)
v • d • e


Text

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t VIRGINIA EIICTRIC AND POWER COMPANY NORTH ANNA POWER STATION MONTHLY OPERATING REPORT MONTH April YEAR 1982 P

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APPROVED:

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OPERATING DATA REPORT DOCKET NO. 50-338 DATE 05-05-82 COMPLETED BY L.L. Rogers ___

TELEPHONE (703) 894-5151 X2510 OPERATING STATUS

. Notes

1. Unit Name: North Anna 1
2. Reporting Period: April 1982
3. Licensed Thermal Power (MWt): 2775
4. Nameplate Rating (Gross MWe): 947
5. Design Electrical Rating (Net MWe): 907
6. Maximum Dependable Capacity (Gross MWe): 918
7. Maximum Dependable Capacity (Net MWe): 865
8. If Changes Occur in Capacity Ratings (Items No. 3 thru 7) Since Last Report, Give Reasons:

NA

9. Power Level To Which Restricted, If Any (Net MWe): N/A
10. Reasons.For Restrictions, If Any: N/A This Month Yr.-to-Date Cumulative
11. Hours In Reporting Period 719 2,879 34,200
12. Number of Hours Reactor Was Critical 701.9 2,840.4 26,668.7
13. Reactor Reserve Shutdown Hours 0 0 0
14. Hours Generator On-Line 692.2 2,818.4 26,171.4
15. Unit Reserve Shutdown Hours 0 0 0
16. Gross Thermal Energy Generated (MWH) 1,721,526 7,477,775 67,792,027
17. Gross Electrical Energy Generated (MWH) 547,329 2,392,514 21,638,036
18. Net Electrical Energy Generated (MWH) 514,717 2,261,084 20,384,000
19. Unit Service Factor 96.3 97.9 76.5 2D. Unit Availability Factor 96.3 97.9 76.5
21. Unit Capacity Factor (Using MDC Net) 82.8 90.8 68.9
22. Unit Capacity Factor (Using DER Net) 78.9 86.6 65.7
23. Unit Forced Outage Rate 3.7 1.9 4.5
34. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):

Refueling Outage 05-21-82 thru 07-03-82

25. If Shut Down At End Of Report Period, Estimated Date of Startup: N/A
26. Units In Test Status (Prior to Commercial Operation):

Forecast Achieved INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION

. . ., . = _ - -. _

- = , .

AVERAGE DAILY UNIT POWER LEVEL

, DO,CKET NO. 50-338 UNIT NA-1

. DATE 05-07-82 COMPLETED BY L.L. Rogers TELEPHONE 703-894-5151X251(

MONTH April DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) 1 545 -

17 289 2 160 18 521

~ ~

3 413 19 427 , ,

4 781 20 380 1 5 834 21 ' 716 i .

6 836 22 835 7 837 23 - 834 8 837 -

24 831 .

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9 839 s 25 835 __

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10 836 26 837 y,

839

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11 838 27 12 839 ,

4 28^ ' 839 13 839 ,29 [_< 838 -

841 30 S 812 14 -

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15 844 - 31 .

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16 530 .; ,

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INSTRUCTIONS .

> .p On this format, list the~ average iaily unit power level in MWe-Net for each , '

day in the reporting month.., Compute-to the neares.t whole megawatt., -

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UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKE1 NO. 50-338 UNIT NAME North Anna 1 DATE 05-0?-82 REPORT MONTH APRIL COMPLETED BY L. L. ROGERS TELEPHONE (703) 894-5_151 X2510 ,

No. Date Type Duration Reason Method of Licensee System Component Cause & Corrective (Hours) Shutting "*" Code Action to 3

Down Reactor Report #

  • 4 5 Prevent Recurrence 82-05 820401 F 13.5 G 3 NA NA NA Reactor trip due to voltage spike on N-41 with N-44 in trip.

82-06 820416 F 8.5 G 2 NA NA NA Manual Reactor trip due to loss of circulating water puraps .

82-07 820419 F 4.8 A 3 NA NA NA Reactor trip due to voltage spike while adjusting N-43 with N-44 in trip.

I 2 3 4 F: Forced Reason: Method: Exhibit F - Instructions S: Scheduled A-Equipment Failure (Explain) 1-Manual for Preparation of Data B-Maintenance or Test 2-Manual Scram. Entry Sheets for Licensee C-Refueling 3-Automatic Scram Event Report (LER) File D-Regulatory Restriction 4-Continuations (NUREG-0161)

. E-Gperator Training & License Examination 5-Load Reduction F-Administrative 9-Other G-Operation 1 Error (Explain) *

- H-Other (Explain) Exhibit H - Same Source

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f Page 1 of 1 UNIT SHUTDOWN AND POWER REDUCTIONS I EXPLANATION SHEET DOCKET NO. 50-338 REPORT MONTH April _ UNIT NAME NA-i YEAR 1982 DATE 05-07-82 l COMPLETED BY L. L. ROGERS 82-05 (G) (3) At 1538 on April 1, 1982 with the unit at 100% power the reactor automatically tripped, followed by an automatic turbine trip. The trip was recorued as being high flux rate trip and high flux setpoint trip at the sar.e time.

The reactor trip was caused by a short to ground while performing maintenance on instrumentation for the steam generator support heaters. A voltage dip caused by the short carried through the vital bus to the  !

Nuclear Instrumentation System Channel 1 (N-41) control and instrumentation power causing the high flux rate and high flux rate and high flux setpoint trips. Since channel N-44 was already placed in trip due to inoperable detectors, the 2 of 4 logic was completed for the automatic reactor trip.

82-06 (G) (2) At 1451 on April 16, 1982 with the unit at 100% power a manually initiated turbine trip / reactor trip occurred.

The unit was tripped due to power being lost to the IG bus which supplies power to the Unit I circulating water pumps.

The circulating water pumps lost power because breaker 15G10 failed to auto tranfer, cross-tieing with the 2G bus.

The undervoltage spike was caused by closing breaker 25A9

("A" HP heater drain pump on unit 2) with ground straps installs 4 82-07 (A) (3) At 0934 on April 19, 1982 with the unit at 100% power the reactor automatically tripped, followed by high flux rate trip and high flux setpoint trip at the same time. The reactor trip was caused by faulty operation of the N43 power range instrument gain adjustment potentiometer. When a Reactor Operator repositioned the potentiometer based on the results of a secondary calorimetric, a spike was generated which caused an N43 high positive rate trip and the high flux setpoint trip. Since N44 was still in the trip condition, the 2 of 4 logic was completed for the automatic reactor trip.

- o . .

OPERATING DATA REPORT DOCKET NO. 50-339 DATE 05-07-82 COMPLETED .BY L.L. Rogers TELEPHONE (703) 894-5151 X2510 '

f OPERATING STATUS

. Notes

1. Unit Name: North Anna 2
2. Reporting Period: April 1982
3. Licensed Thermal Power (MWt): 2775
4. ' Nameplate Rating (Gross MWe): 947
5. Design Electrical Rating (Net MWe): 907
6. Maximum Dependable Capacity (Gross MWe): 939
7. Maximum Dependable Capacity (Net MWe): 890
8. If Changes Occur in Cap. city Ratings (Items No. 3 thru 7) Since Last Report, Give Reasons:

NA

9. Power Level To Which Restricted, If Any (Net MWe): N/A
10. Reasons For Restrictions, If Any: N/A This Month Yr.-to-Date Cumulative
11. Hours In Reporting Period 719 2,879 12,071  ;
12. Number of Hours Reactor Was Critical 0 1,481.7 8,896.5
13. Reactor Reserve Shutdown Hours 0 46.4 1,679.6
14. Hours Generator On-Line 0 1,437.1 8,667.2
15. Unit Reserve Shutdown Hours 0 0 0
16. Gross Thermal Energy Generated (MWH) 0 3,727,204 22,510,045
17. Gross Electrical Energy Generated (MWH) 0 1,233,691 7,570,923
18. Net Electrical Energy Generated (MkH) 0 1,171,660 7,174,076
19. Unit Service Factor 0 66.5 76.3
20. Unit Availability Factor 0 66.5 76.3
21. Unit Capacity Factor (Using MDC Net) 0 60.9 71.0 ,
22. Unit Capacity Factor (Using DER Net) 0 59.8 69.7 ,
23. Unit Forced Outage Rate 0 7.1 16.9 '
24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):

Fall Maintenance Outage 10-15-82 thru 10-25-82

25. If Shut Down At End Of Report Period, Estimated Date of Startup: 05-18-82
26. Units In Test Status (Prior to Commercial Operation):

Forecast Achieved INITIAL CRITICALITY INITIAL ELECTRICITY  !

COMMERCIAL OPERATION

f UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET NO. 50-339 UNIT NAME North Anna 2 DATE 05-07-82 REPORT MONTH April C0riDLETED BY L. L. ROGERS TELEPHONE (703) 894-5151 X2510 No. Date Typel Duration Reason2 Method of Licensee System Component Cause & Corrective (Hours) Shutting "*" Code Acdon to 3

Down Reactor Report #

  • 4 5 Prevent Recurrence 82-09 719 The scheduled refueling outage continues.

T 1

I 2 3 4 F: Forced Reason: Method: Exhibit F - Instructions S: Scheduled A-Equipment Failure (Explain) 1-Manual for Preparation of Data B-Maintenance or Test 2-Manual Scram. Entry Sheets for Licensee C-Refueling 3-Automatic Scram Event Report (LER) File D-Regulatory Restriction 4-Continuations (NUREG-0161)

E-Operator Training & License Examination 5-Load Reduction F-Administrative 9-Other 5 t .

G-Operational Error (Explain) *

. H-Other (Explain) Exhibit H - Same Source

_ - - - - - _ - . _ - n

.. e . . s AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-339 UNIT NA-2 DATE 05-07-82 COMPLETED BY L.L. Rogers TELEPHONE 703-894-515?.X251C MONTH April DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) 1 0 17 0 2 0 18 0 3 0 19 0

- 4 0 20 0 5 0 21 0 6 0 22 0 l 7 0 23 0 8 0 24 0 9 0 25 0 10 0 26 0 11 0 27 0 ,

12 0 28 0 13 0 29 0 14 0 30 0 15 0 31 0 16 0 INSTRUCTIONS On this format, list the average daily unit power level in MWe-Net for each day in the reporting month. Compute to the nearest whole megawatt.

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