ML20059F926

Monthly Operating Rept for Dec 1993 for Vermont Yankee Nuclear Station

ML20059F926
Person / Time
Site:	Vermont Yankee
Issue date:	12/31/1993
From:	Reid D, Wallin G VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
BVY-94-01, BVY-94-1, VY-RCE-94-001, VY-RCE-94-1, NUDOCS 9401140236
Download: ML20059F926 (6)

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< VERMONT YANKEE NUCLEAR POWER CORPORATION

P.O. Box 157, Governor Hunt Road

/ Vernon, Vermont 05354-0157

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yV . 2 (802) 257-7711

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January 10, 1994 VY-RCE-94-001 BVY 94-01 U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Attn: Document Control Desk

Reference:

a) License No. DPR-28 (Docket No. 50-271)

Dear Sir:

Submitted herewith is the Monthly Statistical Report for the Vermont Yankee Nuclear Power Station for the month of December.1993.

Very truly yours, Vermont Yankee Nuclear Power Corp.

cs Donald A. Reid Vice President, Operations cc: USNRC, Region I USNRC Resident Inspector, VYNPS 1500u5  %

9401140236'931231 h(?

PDR ADOCK 05000271 R PDR . LL

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VERMONT YANKEE NUCLEAR POWER STATION MONTIILY STATISTICAL REPORT 93-12 FOR TIIE MONTII OF DECEMBER 1993 i

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l DP 0411 Rev. 5 Page 1 of 1 i

.' OPERATING DATA REPORT-DOCKET NO.50-271

'DATE 940110 COMPLETED BY G.A. WALLIN TELEPHONE (802)257-7711 OPERATING STATUS

1. Unit Name: Vermont Yankee

2. Reporting Period: December NOTES:

3. Licensed Thermal Power (MWt):1593

4. Nameplate Rating (Gross MWe): Ela

5. Design Electrical Rating (Net MWe): 514(oci 504(cc)

6. Maximum Dependable Capacity (Gross MWe): 511

7. Maximum Dependable Capacity (Net MWe): 504

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

N/A

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 744.00 8760.00 184824.00

12. Number Of Hours Reactor was Critical 587.87 7021.06 151217.41

13. Reactor Reserve Shutdown Hours 0.00 0.00 0.00

14. Hours Generator On-Line 501.28 6860.98 148115.62

15. Unit Reserve Shutdown Hours 0.00 0.00 0.00

16. Gross Thermal Energy Generated (MWH) 677627.50 10634605.50 220705671.5q

17. Gross Electrical Energy Generated 223027.00 3534224.00 73519382.00

18. Net Electrical Energy Generated (MWH) 213760.00 3372149.00 69847024.00

19. Unit Service Factor 67.38- 78.32 79.41

20. Unit Availability Factor 67.38 78.32 792 11

21. Unit Capacity Factor (Using MDC Net) 57.01 76.38 74.30

22. Unit Capacity Factor (Using DER Net) 55.90 74.89 72.85

23. Unit Forced Outage Rate 19.16 4.89 5.18

24. Shutdowns scheduled over next 6 months (Type, Date, and Duration of Each: N/A

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 Forecast Achieved INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION VYDPF 0411.01-DP 0411 Rev. 5 Page 1 of 1 RT No. 13.F01.19F

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-271 UNIT Vermont Yankee DATE 940110 '

COMPLETED BY G.A. WALLIN TELEPHONE (8021257-7711 ,

MONTH December )

i DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net)  ;

1. 517 17. 27

2. 517 18. 0

3. 517 19. 0 1

4. 517 20. 33

5. 517 21. 426 t

6. 443 22. 520

7. 0 23. 520

8. 16 24. 520

9. 38 25. 520

10. 0 26. 519

11. 0 27. 519

12. 0 28. 519

13. 0 29. 519

14. 29 30. 519

15. 56 31. 519

16. 59 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.

i VYDPF 0411.02 DP 0411 Rev. 5 Page 1 of 1 RT No. 13.F01.18V ,

UNIT SHUTDOWNS AND POWER REDUCTIONS

. 1 REPORT MONTH DECEMBER DOCKET NO 50-271 -

UNIT NAME Vermont Yankee .

. DATE 940110 COMPLETED BY G.A. Wallin TELEPHONE (802)257-7711 1 2 3 4 5

. No. Date Type Duration Reason Method of License System Component Cause and Corrective (hours) Shutting Event Code Code Action to Prevent Down Report # Recurrence Reactor 93-13 931206 S 43.87 B' 1 N/A HA VALVEX Manual shutdown to repair "A" moisture separator emergency drain valve ,

93-14 931209 F 118.78 A 1 N/A HC HTEXCH Manual shutdown to replace expansion joint on the "A" main condenser due to increased air in-leakage t

A N/A i 93-15 931217 S 80.07 1 HC PIPEXX Manual shutdown to j repair the condenser equalizing line I

1 F: Forced 2 Reason: 3 Method: 4 Exhibit G- Instructions S: Scheduled A-Equipment Failure (Explain) 1 - Manual for Preparation of Data i 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 License Examination 5 Exhibit I- Same Source  !

VYDPF 0411.03 F-Administrative DP 0411 Rev. 5 G-Operational Error (Explain)

Page-1 of 1 H- (Explain) i

- . _ . . _ . . - - . _ - . . - - _ ~ _ . - . - - . - _ . - - . -- . . _ . . - __ _ - .

DOCKET NO. 50-271

~* DATE 940110 COMPLETED BY G.A. WALLIN

- ' TELEPHONE (802)257-7711 REPORT MONTH December

SUMMARY

OF OPERATING EXPERIENCES Hichliahts Vermont Yankee operated at 57.2% of rated thermal power for the month.

Gross electrical generation was 223.027 MWHe or 55.5% design electrical capacity.

Operatina 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 period the plant was operating at 99.9%

of rated thermal power.

931206 At 1900 hours0.022 days <br />0.528 hours <br />0.00314 weeks <br />7.2295e-4 months <br />, initiated a manual shutdown to repair the "A" moisture separator emergency drain valve. (See Unit Shutdowns and Power Reductions) 931206 At 2212 hours0.0256 days <br />0.614 hours <br />0.00366 weeks <br />8.41666e-4 months <br />, the turbine-generator was removed from the grid.

931207 At 0033 hours3.819444e-4 days <br />0.00917 hours <br />5.456349e-5 weeks <br />1.25565e-5 months <br />, the reactor was sub-critical.

931208 At 0040 hours4.62963e-4 days <br />0.0111 hours <br />6.613757e-5 weeks <br />1.522e-5 months <br />, the reactor was critical following repairs.

931208 At 1804 hours0.0209 days <br />0.501 hours <br />0.00298 weeks <br />6.86422e-4 months <br />, the turbine-generator was phased to the grid.

931209 At 1315 hours0.0152 days <br />0.365 hours <br />0.00217 weeks <br />5.003575e-4 months <br />, initiated a manual shutdown to replace the expansion joint on the "A" main condenser, due to increased condenser air in-leakage. (See Unit Shutdowns and Power Reductions) ,

931209 At 1354 hours0.0157 days <br />0.376 hours <br />0.00224 weeks <br />5.15197e-4 months <br />, the turbine-generator was removed from the grid.

931209 At 1655 hours0.0192 days <br />0.46 hours <br />0.00274 weeks <br />6.297275e-4 months <br />, the reactor was sub-critical.

931212 At 1419 hours0.0164 days <br />0.394 hours <br />0.00235 weeks <br />5.399295e-4 months <br />, the reactor was critical following replacement work.

931214 At 1241 hours0.0144 days <br />0.345 hours <br />0.00205 weeks <br />4.722005e-4 months <br />, the turbine-generator was phased to the grid and further investigation due to increased condenser air in-leakage continued.

931217 At 0930 hours0.0108 days <br />0.258 hours <br />0.00154 weeks <br />3.53865e-4 months <br />, initiated a manual shutdown to repair the condenser equalizing line. (See Unit Shutdowns and Power.

Reductions) 931217 At 1039 hours0.012 days <br />0.289 hours <br />0.00172 weeks <br />3.953395e-4 months <br />, the turbine-generator was removed from the grid.

931217 At 1312 hours0.0152 days <br />0.364 hours <br />0.00217 weeks <br />4.99216e-4 months <br />, the reactor was sub-critical.

931220 At 0349 hours0.00404 days <br />0.0969 hours <br />5.770503e-4 weeks <br />1.327945e-4 months <br />, the reactor was critical following repair work.

931220 At 1843 hours0.0213 days <br />0.512 hours <br />0.00305 weeks <br />7.012615e-4 months <br />, the turbine-generator was phased to the grid and a return to full power was initiated.

I At the end of the reporting period the plant was operating at 99.9% of rated thermal power. l VYDPF 0411.04 DP 0411 Rev. 5 Page 1 of 1 ,

RT No. 13.F01.18X l l

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