ML20066C538

Monthly Operating Rept for Dec 1981

ML20066C538
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	01/12/1982
From:	Burger F VERMONT YANKEE NUCLEAR POWER CORP.
To:
Shared Package
ML20066C532	List: ML20066C530 ML20066C538
References
NUDOCS 8211100027
Download: ML20066C538 (10)

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k VERMONT YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 81-12 FOR THE MONTH OF DECEMBER, 1981 1

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+r 8211100027 820112 PDR ADOCK 05000271 R

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OPERATING DATA REPORT DOCKET NO.

50-271 DATE 820112 COMPLETED BY F. J. Burger TELEPHONE (802)257-7711 Ext 137 OPERATING STATUS r' Notes

1. Unit Name: Vermont Yankee

2. R porting Period: Dect.mber 1981

3. Licensed Thermal Power (int):

1593

4. Ntmeplate Rating (Gross We):

540

5. Design Electrical Rating (Net We): 514(oc) 504 Tec)

6. Maximum Dependable Capacity (Gross We): 535

7. Maximum Dependable Capacity (Net We):

504

8. If Changes Occur in Capacity Ratings (Items Number 3 Through 7)Since Last Report, Give Reasonse

9. Power Level to Which Restricted,If Any(Net We):

10. R:asons For Restrictions, If Any:

This Month Yr-to-Date Cumulative 8760.00

11. Hours In Reporting Period 744.00

12. Number Of Hours Reactor Was Critical 651.42 7542.37 65,078.15 0.00 0.00 0.00

13. R: actor Reserve Shutdown Hours 576.73 7409.61 63,011.19

14. Hours Generator On-Line

15. Unit Reserve Shutdown Hours 0.00 0.00 0.00

16. Gross Thermal Energy Generated (MWH) 806,141.50 11.312,243.50 89.915,760.50

17. Gross Electrical Energy Generated (MWH) 267,155.00 3,759,124.00 29.871.971.00

18. Nat Electrical Energy Generated (MWH) 256,031.00 t 568.707.00 28,316,286.00

19. Unit Service Factor 77;.52 84.58 77.47 77.52 84.58 77.47

20. Unit Availability Factor

21. Unit Capacity Factor (Using MDC Net) 68.28 80.83 69.07 66.95 79.26 67.73

22. Unit Capacity Factor (Using DER Net) 15.95 2.78 6.80

23. Unit Forced Outage Rate

24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):

25. If Shut Down At End Of Report Period, Estimated Date of Startup:

26. Units In Test Status (Prior to Commercial Operation):

Forecast Achieved

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INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.

50-271 UNIT Vermont Yankee DATE 820112 COMPLETED BY F.J. Burger (802) 257-7711 Ext 137 g pgggg MONTH December 1981 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Net) 1.

0 17.

518 2.

0 18.

518 3.

28 19.

519 4,

61 20.

497 5.

29 21.

519 22.

520 6.

o 23.

520 7.

82 24.

482 8.

29s 25.

520 9.

3s2 26.

482 10.

396 11, 481 27.

0 12.

517 28.

70

^

13.

511 29 :

365 14.

518 30.

398 15.

518 31.

488 16.

518 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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UNIT SilUTDOWNS AND POWER REDUCTIONS DOCKET NO 50-271 UNIT NAME Vermont Yankee REPORT MONTH December 1981 COMPLETE B J Burger TELEPHONE

_(802) 257-7711 ext 137 l

1 of 2 m

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$oE Y Ef o y

Cause & Corrective N

No.

Date j

jy g

jg ge Action to License H

R port #

0

"*O n

g u

E 81-19 811016 S

57.80 C

N/A N/A ZZ ZZ Refueling outage in progress (cont) 81-20 813203 F

17.38 A

N/A N/A HA TURBIN Turbine rotor out of balance.

Rebalanced rotor.

81-21 811205 F

56.90 A

2 N/A CB PUMPXX Shutdown to replace degraded reactor recirc culation pump seal.

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81-22 811209 S

0 B

4 N/A RB CONROD Power reduction for control rod pattern (Power adjustment.

[

Reduct) 81-23 811220 S

0 B

4 N/A HA TURBIN Power reduction for main turbine and control (Power RB CONROD rod surveillance Reduct)

F: For[ed Reason:

Method:

Exhibit G-Instructions S Sdheduled A-Equipment Failure (Explain) 1-Manual' for Preparation of Data B-Maintenance or Test 2-Manual Scram Entry Sheets for Licensee C-Refuelingx 3-Automatic Scram Event Report (LER) File D-Regulatory Restriction 4-Other (Explain)

(NUREG 0161)

E-Operator Training & License Examination F-Administrative 5 Exhibit I -_Same Source-G-Operational Error (Explain)

H-Other (Explain) n/rra

UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET NO 50-271 UNIT NAME Vermont Yankee DATE 820112 REPORT MONTH December 1981 COMPLETED BY F.J. Burger TELEPHONE (802) 257-7711 ext 13/

2 u Eu A

cm u

ME "c dO License En ause & Corrective N@.

Date is E.

NE E

l$ U E Event E

E$

$2

$23 E

fS$

Report #

E,0 E"' O o

M em m

g U

S 81-24 811224 F

0 A

4 N/A HG DEMINX Power reduction to precoat the "C" conden-(Power sate demineralizer.

Spare demineralizer Reduct) already out of service 81-25 811226 F

35.18 A

3 N/A HB MECFUN Main turbine pressure regulator failed resulting in a high flux scram. Fail-ure caused by sticky mechanical linkage which was cleaned, lubricated, and adjustec 81-26 811230 S

0 B

4 N/A RB CONROD Power reduction for a control rod pattern (Power CB PUMPXX adjustment and maintenance of the "B" Reduct) reactor recirculation pump speed control circuit.

1 2

3 4

F: Fogced Reason:

Method:

Exhibit G-Instructions S: Scheduled A-Equipment Failure (Explain) 1-Manual for Preparation of Data l

B-Maintenance or Test 2-Manual Scram Entry Sheets for Licensee C-Refueling 3-Automatic Scram Event Report (LER) File D-Regulatory Restriction 4-Other (Explain)

(NUREG 0161) l E-Operator Training & License Examination I

F-Administrative

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i Exhibit I - Same Source G-Operational Error (Explain)

H-Other (Explain) 7/80

DOCKET No.

50-271 UNIT Vermont Yankee DATE 820112 COMPLETED BY F.J. Burger TELEPHONE (802)257-7711 Ext 137 SAFETY RELATED MAINTENANCE 1 of 3 NATURE OF MALFUNCTION LER OR OUTAGE EQUIPMENT MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION UPS System Alarms Corrective N/A Incorrect Wiring at Wrong Alarms Corrected Wiring Errors MR 79-0873 Annunciator Panel Annuciate CAD Isolation Valve Corrective N/A Dirt Valve Would Not Disasssabled and Cleaned FSO 109-75-D1 MR 81-0853 Shut Valve Rscirc Sample Valve, Corrective N/A Loose Clevis Hanger Not Sup-Tightened and Anchored FCU-40, Hanger MR 81-1217 porting Valve Clevis to Valve RWCU Valve V12-32B Corrective N/A Worn Packing Leakage Tightened Packing -

MR 81-1456 RWCU Ragenerative Heat Ex-Corrective N/A Unknown Leakage Plugged Leak Off chtngs E-15-lC MR 81-1458 lInterConnectingPiping Canatruction Leak Off N/A Worn Gasket Leakage Replaced Gasket l Corrective RHR Hast Exchanger-MR 81-1459 E-14-1B Cora Spray Valve V14-11A Corrective LER 81-35/3L Fault / Breaker Breaker Tripped Replaced Breaker Mstor Operator Breaker MR 81-1460 During Operatior N

Drywell Pressure Indicator Corrective '

N/A Failed Amplifier Erroneous Readiog Replaced Amplifier PI-16-19-12A MR 81-1468 l

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DOCKET NO.

50-271 UNIT Vcra:nt Ycnkte DATE 820112 COMPLETED BY F.J. Burger TELEPHONE (802) 257-7711 ext 137 SAFETY RELATED MAINTENANCE 2

NATURE OF MALFUNCTION LER OR OUTAGE EQUIPMENT MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION R::ctor Recirculation Pump Corrective N/A Faulty Mechanical High Seal Temp-Rebuilt seal P18-1A MR 81-1470 Seal erature Drywell Personnel Access Corrective N/A Failed G asket Air Leakage Replaced Gasket Hitch Outer Door MR 81-1475 R::ctor Building Personnel Corrective N/A Loose Seal Air Leakage Adjusted Seal, Calked Air L ck Outer Door MR 81-1485 Door Casing S rvice Water Pump Corrective N/A Worn Packing Leakage Adjusted Packing.

P7-1B MR 81-1490 S:rvice Water Pump Corrective N/A Worn Packing Leakage Adjusted Packing P7-lD l-01 81-1491 Recctor Recirc Valves Corrective N/A Worn Packing Leakage Adjusted Packing V2-304A-C and V2-98A, Main MR 81-1498 Stera Valves V60-72B-F and 11

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RHR H ng$r H-192 Bolting Corrective N/A Construction Worn threads, Replaced Bolting Minimal Thread j

MR 81-1521 i

Engagement RHR Service Water Valve Corrective N/A Worn Packing Leakage Adjusted Packing V70-89B MR 81-1530 i-

DOCKET NO.

50-271 UNIT Vernont Yenk2e DATE 820112 COMPLETED BY F.J. Burger TELEFi!ONE (802) 257-7711 ext 137 SAFETY RELATED MAINTENANCE 3

NATURE OF MALFUNCTION ER OR OUTAGg EQUIPMENT MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION SLC Velve V11-25 Corrective N/A Corroded Seat Valve Leakage-Lapped Seating Surfaces MR 81-1572 Smrvics Water Pump Corrective N/A Worn Packing Leakage Adjusted Packing T7-1C MR 81-1582 RWCU Vsive V12-19B Corrective N/A Worn Packing Leakage Adjusted Packing MR 81-1604 RilR Service Water Pump Corrective LER 81-37/3L Worn Bushings Breaker Trips Replaced B2shings-P8-1A Circuit Breaker MR 81-1612 Upon Pump Start e*

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DOC".ET No.

50-271 UNIT Vermont Yankee DATE 820112 COMPLETED BY F.J. Burger TELEPHONE (802) 257-7711 ext 137 REPORT MONTH December 1981

SUMMARY

OF OPERATING EXPERIENCES Highlights Vermont Yankee operated at 68.02% of rated thermal power for the month.

Gross electrical generation was 267,155 MWH, or66.50% of design electrical capacity.

Operating Summary The following is a chronological description of plant operations including other pertinent items of interest for the month:

12/1/81 At the beginning of the reporting period the plant was shut down for refueling.

At 1949 hours0.0226 days <br />0.541 hours <br />0.00322 weeks <br />7.415945e-4 months <br /> a reactor start up was initiated.

12/3/81 At 2010 hours0.0233 days <br />0.558 hours <br />0.00332 weeks <br />7.64805e-4 months <br />, after completing main turbine overspeed testing, the main turbine was shut down for rotor balancing.

12/4/81 At 1333 hours0.0154 days <br />0.37 hours <br />0.0022 weeks <br />5.072065e-4 months <br /> the main turbine was phased into the grid.

12/5/81 At 0220 hours0.00255 days <br />0.0611 hours <br />3.637566e-4 weeks <br />8.371e-5 months <br /> a reactor shutdown was initiated to replace a degraded seal in the "A" reactor recirculation pump.

12/7/81 At 0152 hours0.00176 days <br />0.0422 hours <br />2.513228e-4 weeks <br />5.7836e-5 months <br /> a reactor start up and power ascension was initiated 12/9/81 At 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br /> a power reduction was initiated for a control rod pattern adjustment.

At 1730 hours0.02 days <br />0.481 hours <br />0.00286 weeks <br />6.58265e-4 months <br /> a return to full power initiated.

12/20/81 At 0200 hours0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br /> a power reduction was initiated for control rod and main turbine surveillance testing.

At 0600 hours0.00694 days <br />0.167 hours <br />9.920635e-4 weeks <br />2.283e-4 months <br /> a return to full power was initiated.

12/24/81 At 0100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> a power reduction was initiated to remove the "C" condensate demineralizer from service for precoating.

The sparc demineralizer was already out of service.

At 0610. hours a return to full power was initiated.

12/26/81 At 1944 hours0.0225 days <br />0.54 hours <br />0.00321 weeks <br />7.39692e-4 months <br /> the plant was shutdown by a reactor high flux scram caused by a faulty main turbine pressure regulator.

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12/27/81 At 2035 hours0.0236 days <br />0.565 hours <br />0.00336 weeks <br />7.743175e-4 months <br /> a reactor start up and return to full power,was initiated.

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Operating Summary (continued)

I 12/30/81 At 0900 hours0.0104 days <br />0.25 hours <br />0.00149 weeks <br />3.4245e-4 months <br /> a power reduction was initiated for a control rod pattern adjustment and maintenance of the "B" reactor recirculation pump speed centrol circuit.

At 1030 hours0.0119 days <br />0.286 hours <br />0.0017 weeks <br />3.91915e-4 months <br /> a return to full power was initiated.

12/31/81 At the end of the reporting period the plant was operating at 99.7% of rated thermal power.

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