ML20237A492

Monthly Operating Rept for Nov 1987

ML20237A492
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	11/30/1987
From:	Murphy W, Wallin G VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC
References
VYV-87-268, NUDOCS 8712150040
Download: ML20237A492 (6)

Text

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VERMONT YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 87-11 FOR THE MONTH OF NOVEf43ER,1987 i

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VYDPF 0411 Rev. 1 i

'8712150040 871130 l

PDR ADOCK 05000271 B

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OPERATING DATA REPORT' DOCKET NO.

50-271 DATE 871210

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COWLETED BY G.A. Wallin-TELEPHONE (802) 257-7711 OPERATING' STATUS:

-Notes

1. Unit Names' Vermont Yankee

2. Reporting Period

November.

- 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-p 7.:1 Maximum-Dependable Capacity'(Net MWe):

504 l-

!0.

If changes occur-in capacity ratings (Items Nunter 3 through 7) since last report,-

L give reasons:

N/A 9.

Power level to which restricted, if any (Net MWe):' N/A

10. Reasons for restrictions;Jif any:

N/A-L l

This month '. Yr-to-Date Cumulative

11. Hours in Reporting Period!

720.00 8016.00 L

12.' Number of Hours Reactor;was Critical 669.62 6630.63 104101.36 l

13. Reactor Reserve Shutdown Hours 0.00 0.00 0.00 l

14. Hours Generator:On-Line 654.52 6546.58 101525.27

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15. Unit Reserve Shutdown Hours 0.00 0.00 0.00

16. Gross Thermal Energy-Generated (MWH) 1019840.00 9893690.00

.148569330.50

17. Gross Electrical Energy' Generated-(MWH) 344361.00 3315018.00 49443852.00 l

'18. Net Electrical Energy Generated'(MWH) 330457.00 3156384.00 46915060.00

19. Unit Service Factor 90.91 81.67 76.23

20. Unit Availability Factor 90.91 81.67 76.23

21. Unit Capacity Factor (using.K)C Net) 91.07 78.13 69.90

22. Unit Capacity Factor (using DER Net) 89.29 76.61 68.54

23. Unit Forced Outage Rate 9.09 1.30 6.36

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 l

26.' Units in Test Status (prior to commercial operation): N/A Forecast Achieved INITIAL CRITICALITY l

WDPF 0411.01 INITIAL ELECTRICITY j

Rev. 1-COMERCIAL OPERATION l

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AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.

50-271 UNIT Vermont Yankee DATE 871210 l

COMPLETED BY G.A. Wallin TELEPHONE (802) 257-7711 f

MONTH November l

l DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL l

(MWe-Net)

(MWe-Net) 1 512 17 518 2

516 18 518 l

3 517 19 518 4

517 20 518 5

517 21 518 6

517 22 513 7

517 23 518 8

28 24 518 i

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25 518 10 35 26 518 11 333 27 518 12 506 28 518 13 464 29 514 14 517 30 518 15 513 31 16 517 INSTRUCTIONS:

J On this format, list the average daily unit power level in MWe-Net for each day j

in the reporting month. Compute to the nearest whole megawatt.

VYDPF 0411.02 Rev. 1

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DOCKET NO.

50-271 UNIT Vermont Yankee DATE 871210 COMPLETED BY G. A. Wallin TELEPHONE (802) 257-7711 REPORT MJNTH November SUIMARY OF OPERATING EXPERIENCES Highlights 4

Vermont Yankee operated at 88.9% of rated thermal power for the month.

Gross electrical generation was 344,361 MWHe or 88.6% of design electrical capacity.

Operating 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 99.2% of j

rated thermal power.

871108 At 0125 hours0.00145 days <br />0.0347 hours <br />2.066799e-4 weeks <br />4.75625e-5 months <br />, the reactor scrammed on a high level Main Turbine trip. This was caused by a restriction in the Feedwater Control Valves.

Investigation revealed that the restriction was imposed by mispositioning of the manual operator shafts and handwheels in a position other than " neutral". This hampered the Feedwater Control Valves in regulating reactor water level during the planned power reduction. (See Unit Shutdowns and Power Reductions) 871110 At 0348 hours0.00403 days <br />0.0967 hours <br />5.753968e-4 weeks <br />1.32414e-4 months <br />, the reactor was critical.

871110 At 1854 hours0.0215 days <br />0.515 hours <br />0.00307 weeks <br />7.05447e-4 months <br />, the turbine-generator was phased to the grid and a power ascension commenced.

871113 At 0030 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />, reduced power to 66% to perform a rod pattern adjust-ment.

871113 At 0205 hours0.00237 days <br />0.0569 hours <br />3.38955e-4 weeks <br />7.80025e-5 months <br />, completed the rod pattern adjustment and a return to full power was initiated.

At the end of the reporting period, the plant was operating at 100% of rated thermal power.

VYDPF 0411.04 Rev. 1

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VERhiONT YANKEm NUCLEAR POWER CORPORATION P. O. BOX 157 GOVERNOR IIUNT ROAD VERNON, VERMONT 05354 i

i December 10, 1987 I

VYV 87-268

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l U. S. Nuclear Regulatory Commission 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 q

Nuclear Power Station for the month of November, 1987.

j Very truly yours, j

VERMONT YANKEE NUCLEAR POWER CORP.

l hW kfw Warren P(. Murphy Vice President a d Manager of Operations i

i VYDPF 0411 3

Rev. 1 i

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