ML20236P346

Monthly Operating Rept for Oct 1987

ML20236P346
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	10/31/1987
From:	Murphy W, Wallin G VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC
References
VYV-87-231, NUDOCS 8711170254
Download: ML20236P346 (6)

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VERMONT YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 87-10 FOR THE MONTH OF OCTOBER, 1987 1

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OPERATING DATA REPORT DOCKET NO.

50-271 l

DATE 871110 COMPLETED BY G.A. Wallin TELEPHONE (802) 257-7711

]

OPERATING STATUS Notes:

I 1.

Unit Names Vermont Yankee 2.

Reporting Period:

October 3.

Licensed Thermal Power (MWt):

1593 a

'4.

Nameplate Rating (Gross MWe):

540 5.

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

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6.

Maximum Dependable Capacity (Gross MWe):

535 j

7.

Maximum Dependable Capacity (Net MWe):

504 l

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 i

11. Hours in Reporting Period 745.00 7296.00

12. Number of Hours Reactor was Critical 708.03 5961.01 103431.74

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13. Reactor Reserve Shutdown Hours C.00 0.00 0.00-

14. Hours Generator On-Line 644.78 5892.06 100870.75

15. Unit Reserve Shutdown Hours 0.00 0.00 0.00

16. Gross Thermal Energy Generated (MWH) 916714.00 8873850.00 147549490.50

17. Gross Electrical' Energy Generated (MWH) 304522.00 2970657._0_0 49099491.00

18. Net Electrical Energy Generated (MWH) 291553.00 2825927.00 46584603.00

19. Unit Service Factor 86.55 80.76 76.15

20. Unit Availability Factor 86.55 80.76 76.15

21. Unit Capacity Factor (using ME Net) 77.65 76.85 69.78

22. Unit Capacity Factor (using DER Net) 76.14 75.36 68.42

23. Unit Forced Outage Rate 2.36 0.35 6.34

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 VYDPF 0411.01 INITIAL ELECTRICITY Original COMMERCIAL OPERATION i

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AVERAGE DAILY UNIT POWER LEVEL l

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DOCKET NO.

50-271 l

UNIT Vermont Yankee

]

DATE 871110 1

COMPLE1ED BY G.A. Wallin TELEPHONE.

(802) 257-7711 t'

MONTH October DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL' (MWe-Net)

(MWe-Net) 1 0

17 417 l

2-0 18 475 3

0 19 516 4.

12 20 516 5'

46 21 516 6

165 22 516 7

285 23 516 8

395 24 516 9

351 25 533 (25hr. day) 10 351 26 516 11 419 27 516 12 491 28 516 13 510' 29 516 14

'503 30' 516 15 502 31 516 16 502 INSTRUCTIONS:

On this format, list the average daily unit power level in MWe-Net for each day 4

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

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DOCKET NO.

.50-271 UNIT

' Vermont Yankee DATE 871110 COMPLETED BY G.A. Wallin TELEPHONE (802)'257-7711 REPORT MONTH October

' SUM 4ARY OF OPERATING EXPERIENCES Highlights Vermont Yankee operated at 77.2% of rated thermal power for the month.

Gross electrical generation was 304,522 HiWe or 75.7% 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 0.0% of rated thermal power.

871002 At 0220 hours0.00255 days <br />0.0611 hours <br />3.637566e-4 weeks <br />8.371e-5 months <br />, the Reactor was critical.

871003 At 1356 hours0.0157 days <br />0.377 hours <br />0.00224 weeks <br />5.15958e-4 months <br />, the' Reactor scrammed due to a Turbine Control Oil System problem.

i 871004 At 0034 hours3.935185e-4 days <br />0.00944 hours <br />5.621693e-5 weeks <br />1.2937e-5 months <br />, the Reactor was critical.

871004 At 1239 hours0.0143 days <br />0.344 hours <br />0.00205 weeks <br />4.714395e-4 months <br />, the Turbine generator was phased to the grid.

871004 At 1907 hours0.0221 days <br />0.53 hours <br />0.00315 weeks <br />7.256135e-4 months <br />, the Turbine generator was removed from the grid for testing and repairs.

(See Unit Shutdowns and Power Reductions) 871005 At 1041 hours0.012 days <br />0.289 hours <br />0.00172 weeks <br />3.961005e-4 months <br />, the Turbine generator was phased to the grid and a return to full power was initiated.

871009 At 1145 hours0.0133 days <br />0.318 hours <br />0.00189 weeks <br />4.356725e-4 months <br />, reduced power to perform a rod pattern adjustment.

(See Unit Shutdowns and Power Reductions) 871009 At 1700 hours0.0197 days <br />0.472 hours <br />0.00281 weeks <br />6.4685e-4 months <br />, a return to full power was initiated.

871015 At 0100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br />, the cooling towers were secured and the Plant went to an open cycle mode of operation.

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-871017 At 0930 hours0.0108 days <br />0.258 hours <br />0.00154 weeks <br />3.53865e-4 months <br />, reduced power to perform a rod pattern adjustment, j

(See Unit Shutdowns and Power Reductiors) 871017 At 1140 hours0.0132 days <br />0.317 hours <br />0.00188 weeks <br />4.3377e-4 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 99.9% of I

rated thermal power.

4 VYDPF 0411.04 Original 4

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JVERhiONT YINKEE NUCLEAR POWER CORPOR ATION -

' P. O. BOX 157 -

-'.i i, lY GOVERNOR HUNT. ROAD l

VERNON-VERMONT 05354-l l

.l November-10, 1987:

-VYV 87-231-l n

U. S. Nuclear Regulatory-Commission Director, Office of Management Information

and Program. Control.

Washington, D. C.

20555-i Dear Sir Submitted herewith is the Monthly Statistical. Report for the Vermont Yankee

' Nuclear Power Station-for the month of October,.1987.

Very truly yours,

~

VERMONT YANKEE NUCLEAR POWER CORP.

A d'

Warren P. Murphy Vice President and Manager of Operations WPM / DAW /nay:MSR1.1AISR

'VYDPF 0411 Original

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