ML20072V060

Monthly Operating Rept for Aug 1994 for Vermont Yankee Nuclear Power Station

ML20072V060
Person / Time
Site:	Vermont Yankee
Issue date:	08/31/1994
From:	Reid D, Wallin G VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
BVY-94-92, VY-RCE-94-022, VY-RCE-94-22, NUDOCS 9409190158
Download: ML20072V060 (6)

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VERMONT YANKEE '

i . NUCLEAR POWER CORPORATIO.N i

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{. e3' P.O. Box 157. Governor Hunt Road y vernon, vermont 05354-0157  :

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%,. , , , (802) 257-7711 ,

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1 i-September 10,1994  :

VY-RCE-94-022 BVY 94-92 .i

!- U.S. Nuclear Regulatory Commission .  ;

Attn: .

Document Control Desk. ]

Washington,' D.C. 20555 .i

Reference:

a) License No. DPR-28 (Docket No. 50-271) . i In accordance with section 6.7.A~.3 of the Vermont Yankee Technical' l Specifications, submitted herewith is the Monthly Statistical Report for the  !

Vermont Yankee Nuclear Power Station for the month of Aueust.1994. ,

. Sincerely, i

.[

Vermont Yankee Nuclear Power Corp. l b '

Donald A. Reid l Vice President, Operations j

cc: USNRC Region I Administrator USNRC Resident Inspector - VYNPS USNRC Project Mananger - VYNPS 7,n gu

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4-9409190158 940831 1

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PDR ADOCK 05000271

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s VERMONT YANKEE NUCLEAR POWER STATION MONTIILY STATISTICAL REPORT 94-08 l

FOR TIIE MONTII OF AUGUST 1994 l

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. OPERATING DATA REPORT

. DOCKET NO.50-271 DATE 940910 COMPLETED BY G.A. WALLIN TELEPHONE (802)257-7711 OPERATING STATUS

1. Unit Name: Vermont Yankee

2. Reporting Period: August NOTES:

3. Licensed Thermal Power (MWt):1593

4. Nameplate Rating (Gross MWe) : 54Q

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

6. Maximum Dependable Capacity (Gross MWe): 5.J_E

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 5831.00 190655.00

12. Number Of Hours Reactor was Critical 744.00 5790.12 157007.53 '

13. Reactor Reserve Shutdown Hours 0.00 0.00 0.00

14. Hours Generator.On-Line 744.00 5774.17 153889.79

15. Unit Reserve Shutdown Hours 0.00 0.00 0.00

16. Gross Thermal Energy Generated (MWH) 1172572.10 9103540.20 229809211.70

17. Gross Electrical Energy Generated 387178.00 3053516.00 76572898.00-

18. Net Electrical Energy Generated (MWH) 366153.00 2917491.00 72764515.00

19. Unit Service Factor 100.00 99.03 80.00 i 20. Unit Availability Factor' 100.00 99.03 80.00 l 21. Unit Capacity Factor (Using MDC Net) 97.65 99.27 75.05

22. Unit Capacity Factor (Using DER Net) 95.75 97.34 73.59

23. Unit Forced Outage Rate 0.00 0.97 5.03

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 i INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION VYDPF 0411.01  !

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. AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-271 UNIT Vermont Yankee DATE 940910 COMPLETED BY G.A. WALLIN TELEPHONE (802)257-7711 MONTH August DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net)

1. 385 17. 497

2. 454 18. 504

3. 491 19, 504

4. 487 20. 505

5. 491 21. 502

6. 496 22. 511

7. 496 23. 510

8. -495 24. 507

9. 492 25, 501

10. 491 26. -496

11. 493 27. 501

12. 489 28. 498

13. 489 29. 501

14. 488 30. __

502

15. 497 31. __ 489

16. 495 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 SHUTDOWNS AND POWER REDUCTIONS REPORT MONTH AUGUST DOCKET NO 50-271 UNIT NAME Vermont Yankee DATE 940910 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 94-07 940801 F 0.00 A 4 N/A WE HTEXCH West cooling tower (cont) Power structural damage Reduction repaired 94-08 940831 F 0.00 A 4 N/A CB PUMPXX "A" recirculation pump Power trip. Presently Reduction investigating cause.

1 F: Forced 2 Reason: 3 Method: 4 Exhibit G- Instructions i S: Scheduled A-Equipment Failure (Explain) 1 - Manual for Preparation of Data f B-Maintenance or Test 2 - Manual Scram Entry Sheets for License l 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 I

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DOCKET NO . 5 0 - 2 71

. DATE 940910 COMPLETED BY G . A . WALLIN TELEPHONE (802.1257-7711 REPORT MONTH August

SUMMARY

OF OPERATING EXPERIENCES Hichlights Vermont Yankee operated at 98,.9% of rated thermal power for the month.

Gross electrical generation was 387.178 MWHe or 96.4% 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 79.4.1 ,

of rated thermal power. ,

940801 At 1915 hours0.0222 days <br />0.532 hours <br />0.00317 weeks <br />7.286575e-4 months <br />, began a return to full power following West cooling tower structural damage repairs. (See Unit Shutdowns and Power Reductions) l 940831 At 2255 hours0.0261 days <br />0.626 hours <br />0.00373 weeks <br />8.580275e-4 months <br />, the "A" recirculation pump tripped. (See_ Unit Shutdowns and Power Reductions) 4 940831 At 2259 hours0.0261 days <br />0.628 hours <br />0.00374 weeks <br />8.595495e-4 months <br />, initiated a power reduction'to exit instability region II.

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l At the end of the reporting period the plant was operating at 51.0% of rated thermal power.

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