ML20085D045

Monthly Operating Rept for Sept 1991 for Vermont Yankee Nuclear Power Station

ML20085D045
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	09/30/1991
From:	Murphy W, Wallin G VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
VY-RCE-91-009, VY-RCE-91-9, NUDOCS 9110150211
Download: ML20085D045 (6)

Text

1 VIUtA10NT YANKEE Nuct! EAR POWER COltPOIIATION

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P.O. Box 157, Governor Hunt Road

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Vernon. Ver mont 05354-0157

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(002) 257-7711 s

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October 10, 1991 VY-RCE-91-009 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C.

20555

Dear Sir:

Submitted herewith is the Monthly Statistical Report for the Vermont Yankee Nuclear Power Station for the month of September, 1991.

Very truly yours, VERMO JT YANKEE fiUCLEA'A POWER CORP.

ik~

% sm Warren P.

Murph Senior Vice Presi t,

Operations cc:

1) USNRC Region I 475 Allendale Road King of Prussia, PA 19406

2) USNRC Resident Inspector, VYNPS DP 0411 Rev. 3 Page 1 of 1 9110150211 910930 FDR ADOCK 05000271 R

PDR

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VERMONT YANKEE NUCLEAR POWER STATION MONTilLY STATISTICAL REPORT 91-09 FOR Tile MONTi{ OF SEPTEMBER, 1991 DP 0411 Rev. 3 Page 1 of 1

OPERATING DATA REPORT DOCKET NO.

50-271 DATE 911010 COMPLETED BY G.A.

WALLIN TELEPHONE (802)257-7711 OPERATING STATUS

1. Unit Name:

Vermont Yankee

2. Reporting Period:

September NOTES:

3. Licensed Thermal Power (MWt):1593

4. Nameplate Rating (Gross MWe):

11Q i

i 5.

Design Electrical Rating (Not MWo):

514 foci 504(ccl

6. Maximum Dependable Capacity (Gross MWe):

121

7. Maximum Dependable Capacity (Not MWo):

121 8.

If changes, occur in capacity ratings (Itons Number 3 through 7) since last report, give reasons:

N/A

9. Power level to which restricted, if any(Not MWe):

N/A

10. Reasons for restrictions, if any:

N/A This Month Yr-to-Date cumulative

11. Hours in Reporting' Period 720.00 6551.00 165071.00

12. Number Of Hours Reactor was Critical 577.08 6055.93 134244.56

13. Reactor Reserve Shutdown Hourn 0.00 0.00 0.00 j

14. Hours Generator On-Line 564.63 5992.61 1313sA221

15.. Unit Reserve Shutdown Hours 0.00 0.00 0.00

16. Gross Thermal Energy Generated (MWH) 884488.5Q_ 9452785.50-194768090.50 i

17. Gross Electrical Energy Generated 290492 00 3137453.0Q _f4884948.0Q

18. Not Electrical Energy Generated (MWH) 274337.00 2981697.00 61613667.00

19. Unit Service Factor 78.42 91.48 78.77

20. Unit Availability Factor 78.42_

91.48 78.77

31. Unit Capacity Factor (Using MDC Net) 75.6Q_

90.31 73.30

32. Unit Capacity Factor (Using DER Net) _

74.13 88.55 71.88

33. Unit Forced Outage Rate 0.00 6.30 5.55

24. Shutdowns scheduled over next 6 months (Type, Date, and Duration of Each: _1232 Refuelina Outace scheduled to becin on March 7.

1992 and last for a six week period.

25. If shut down at end of report period, estimated date of startup: N/A

26. Units In Test Status (prior to commercial operation): N/A i

Forecast Achieved INITIAL CRITICALITY L

INITIAL ELECTRICITY COMMERCIAL OPERATION VYDPF 0411.01 DP 0411 Rev. 3 i

Page 1 of 1 RT No. 13.F01.19F

l AVERAGE DAILY UNIT POWER LEVEL DOCKET 110.10-271 UNIT YJ2Enont Yankes DATE R11010 COMPLETED BY L A. WliLLIN TELEPl!ONE

.L{LQ;tl2k2 -7711__

i MONTil

_fratember DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Not) 1.

491 17.

491 2.

490 18.

493 3.

486 19.

493 4.

485 20.

502 5.

490 21.

500 6.

488 22.

196 7.

490 23.

491 8.

250 24.

SQ2 9.

0 25.

504 0

26.

511 10.

11.

0 27.

508 12.

0 28.

508 13.

0 29.

506 14.

0 30.

508 15.

268 31.

16.

479 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.

VYDPF 0411.02 DP 0411 Rev. 3 Page 1 of 1 RT No. 13.F01.18V

1 1

I i

UMIT SHUTDOWNS AND POWER REDUCTIONS REPORT MONTH SEPTEMBER DOCKET NO 50-271 UNIT NAME Vermont Yankee DATE 911010 COMPLETED BY G.A. Wallin TELEPHONE (802)257-7711 l

1 2

3 No.

Date Type Duration Reason Method of License System Component cause and Corrective (hours)

Shutting Event Code Code Action to Prevent Down Report /

4 5

Recurrence Reactor i

91-09 910908 S

155.37 B,H*

1 N/A CB PUMPXX Plant shutdown for recirculation pump seals replacerent and a rod pattern exchange.

1 F: Forced 2 Reason:

3 Method:

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

(NUREG 0161)

E-Operator Training and 5 Exhibit I - Same Source License Examination VYDPF 0411.03 F-Administrative DP 0411 Rev. 3 G-Operational Error (Explain)

Page 1 of 1

• H-(Explain)- Rod Pattern Exchange I

i

i

- i. 6 DOCKET No.10-271 I

DATE 91LQ10 COMPLETED BY G.A.

WALLIN TELEPHONE (802)257-7711 i

REPORT MONTH

_ SEPTEMREIL

SUMMARY

OF OPERATING EXPERIENCES Highlichts Vermont Yankee operated at 77.1% of rated thermal power for the month.

Gross electrical generation was 290 422 MWHe or 74.7% design electrical

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

At the beginning of the reporting puriod the plant was operating at 22211 of rated thermal power.

910908 At 1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br />, a manual shutdown was initiated to replace recirculation pump seals-and perform a rod pattern exchange.

(See Unit Shutdowns and Power Roductions) i 910908 At 1438 hours0.0166 days <br />0.399 hours <br />0.00238 weeks <br />5.47159e-4 months <br />, the turbine-generator was removed from the grid.

910908 At 1750 hours0.0203 days <br />0.486 hours <br />0.00289 weeks <br />6.65875e-4 months <br />, the reactor was sub-critical.

910914 At 1645 hours0.019 days <br />0.457 hours <br />0.00272 weeks <br />6.259225e-4 months <br />, the reactor was critical.

910915 At 0200 hours0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br />, the turbine-generator was phased to the grid and initiated a return to full power.

1 At the_end.of the-reporting period the plant was operating at 22x21 of trated' thermal power.

VYDPF 0411.04 DF 0411 Rev. 3 Page 1 of 1 RT No. 1?.F01.18X

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