ML20134F309

Monthly Operating Rept for Jul 1985

ML20134F309
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	07/31/1985
From:	Burger F, Murphy W VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
NUDOCS 8508210053
Download: ML20134F309 (7)

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OPERATING DATA REPORT Docket No. 50-271 Date 850809 Completed by F.J. Burger Telephone (802) 257-7711 OPERATING STATUS Notes:

1. Unit Name: Vermont Yankee

2. Reporting Period: July

3. Licensed Thermal Power (MWt): 1593

<. 4. Nameplate Rating (Gross MWe): 540

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

6. Maximum Dependable Capacity (Gross MWe): 535

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 5087.00

12. Number of Hours Reactor was Critical 744.00 5071.97 91885.90

13. Reactor Reserve Shutdown Hours 0.00 0.00 0.00

14. Hours Generator On-Line 744.00 5066.55 89496.62

15. Unit Reserve Shutdown Hours 0.00 0.00 0.00

16. Gross Thermal Energy Generated (MWH) 1130491.50 7904765.50 130463775.00

17. Gross Electrical Energy Generated (MWH) 364127.00 2636609.00 4342635" 00

18. Net Electrical Energy Generated (MWH) 340553.00 2507205.00 41208053.00

19. Unit Service Factor 100.00 99.60 79.39

20. Unit Availability Factor 100.00 99.60 79.39

21. Unit Capacity Factor (using MOC Net) 90.82 97.79 72.53

22. Unit Capacity Factor (using DER Net) 89.05 95.89 71.12

23. Unit Forced Outage Rate 0.00 40 7.01 24 Shutdowns scheduled over next 6 months (Type, Date and Duration of Each):

Refuelina outage scheduled to begin September 21, 1985 and continue to May 3, 1986.

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 MSR1.2 8508210053 850731 7 P3R ADOCK 05000271 R PDR q ( <y a

AVERAGE DAILY UNIT POWER LEVEL Docket No. 50-271 Unit Vermont Yankee Date 850809 Completed by F.J. Buraer Telephone (802) 257-7711 MONTH __ July, 1985 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) 1 476 17 46i 2 480 18 457 3 475 19 453 4 476 20 449 5 472 21 449 6 470 22 449 7 467 23 454 -

8 472 24 453 9 470 25 446 10 464 26 441 11 466 27 444 12 469 28 444 13 464 29 441 14 456 30 439 15 455 31 441 16 432 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.

MSR.F2

Dock t No. 50-271 Unit Vermont Yankee ,

UNIT SHUTDOWNS AND POWER REDUCTIONS Date 850809 Completed by F. J. Burger REPORT MONTH July Telephone (802) 257-7711 1 2 3 4 5 No. Date Typed Duration Reason Method of License System Component Cause and Corrective Action to (hours) Shutting Down Event Code Code Prevent Recurrence Reactor Report #

85-12 850716 F 0 A 4 N/A WG MOTORX Power reduction caused by the (Power loss of both Turbine Building Reduction) Closed cooling water pumps.

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

E-Operator Training and License Examination 4-Other (Explain)

F-Administrative 5 G-Operational Error (Explain) -

Exhibit I - Same Source H-Other (Explain)

MSR.F3

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Dockst No. 50-271 Unit Vermont Yankee Date 850809 Completed by F.J. Burger Telephone (802) 257-7711 REPORT MONTH Julv FUMMARY OF OPERATING EXPERIENCES Hiahlichts Vermont Yankee operated at 95.38% of rated thermal power for the month. Gross electrical generation was 364,127 MWH, or 90.06% of design electrical capacity.

Operatina Summary At the beginning of the reporting period the plant was operating at 93% of rated thermal power.

850716 - At 1130 hours0.0131 days <br />0.314 hours <br />0.00187 weeks <br />4.29965e-4 months <br /> a power reduction was initiated due to the loss of

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both Turbine Building closed cooling water pumps.

850716 - At 1430 hours0.0166 days <br />0.397 hours <br />0.00236 weeks <br />5.44115e-4 months <br /> a return to full power was started.

At the end of the reporting the plant was operating at 91% of rated thermal power. The power coastdown to the 1985-86 refueling outage is in progress.

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/ VERMONT YANKEE NUCLEAR POW ER CORPORATION P. O. BOX 157 GOVERNOR IlUNT ROAD VERNON, VERMONT 05354 VYV 85-366 i

August 9, 1985 U. S. Nuclear Regulatory Conniission Director, Office of Management Information and Program Control Washington, D. C. 20555 Dear Sir Submitted herewith is the Monthly Statistical Report for the Vermont Yankee Nuclear Power Station for the month of July,1985.

Very truly yours, VERMONT YANKEE NUCLEAR POWER CORPORATION W-

• Warren P. N rphy Vice President and Manager of Operations WPMgJB/pt:MSRl.1 fy ,;\

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VERMONT YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 85-07 FOR THE MONTH OF JULY, 1985 ,

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