ML20138B836

Monthly Operating Rept for Sept 1985

ML20138B836
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	09/30/1985
From:	Burger F, Murphy W VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC
References
VYV-85-441, NUDOCS 8510220048
Download: ML20138B836 (7)

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VERMONT YANKEE NUCLEAR POWER STATION MONTli Y STATISTICAL REPORT 85-09 i

1 FOR,THE MONTH OF SEPTEMBER, l'985 9

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OPERATING DATA REPORT Dockst No.

50-271 Date 851010 Completed by.

F.J. Buraer Telephone (802) 257-7711 OPERATING STATUS Notes:

1.

Unit Name:

Vermont Yankee 2.

Reporting Period:

September 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 Numbe'r 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 720.00 6551.00

12. Number of Hours Reactor was Critical 481.16 6297.13 93111.06

13. Reactor Reserve Shutdown Hours 0.00 0.00 0.00 14 Hours Generator On-Lfne 477.73 6288.28 90718.35

15. Unit Reserve Shutdown Hours 0.00 0.00 0.00

16. Gross Thermal Energy Generated (MWH) 607388.50 9550621.00 132109630.50

17. Gross Electrical Energy Generated (MWH) 195419.00 3166154.0C 43955902.00

18. Net Electrical Energy Generated (MWH) 181060.00 2999402.00 41700250.00

19. Unit Service Factor 58.71 95.15 79.39

20. Unit Availability Factor 58.71 95.15 79.39

21. Unit Capacity Factor (using MOC Net) 49.00 90.84 72.45

22. Unit Capacity Factor (using DER Net) 48.92 89.08 71.04

23. Unit Forced Outage Rate 0.00

.33 6.93

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

Refueling outaae began September 21, 1985 for 32 weeks.

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 L-

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AVERAGE DAILY UNIT POWER LEVEL Docket No.

50-271 Unit vermont Yankee Date 851010 Completed by F.J. Burger Telephone (802) 257-7711 MONTH September

[RY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Net) 1 400 17 381 1

2 397 18 378 3

395' 19 374 4

390 20 278 l

5 388 21 0

6 387 22 0

7 388 23 0

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382 24-0 9

386 25 0

10 279 26 0

11 403 27 0

12 390 28 0

13 389 29 0

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14 387 30 0

I 15 385 31 f

i 16 384

- i INSTRUCTIONS:

t On this format, list the aversge daily unit power level in MWe-Net for each day in the reporting month. Compute to the nearest whole mecawatt.

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Docket No.

50-271 Unit Vermont Yankee UNIT SHUTDOWNS AND POWER REDUCTIONS Date 851010 Completed by F. J. Burger REPORT MONTH September Telephone (802) 257-7711 1

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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 #

85-13 850910 F

0 A

4 NA CB ELECON Power reduction due to tripped Power reactor recirculation pump Reduction caused by a false isolation signal which originated in the recire. pump's suction valve valve isolation circuitry.

Temporary repairs were completed and the pump restarted.

Permanent repairs will be done during the current refueling outage.

85-14 850920 S

242.27 C

1 NA NA NA Shutdown for 1985 Refueling Outage.

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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-Adninistrative 5

G-Operational Error (Explain)

Exhibit I - Same Source H-Other (Explain) e.

Docket No.

50-271 Unit Vermont Yrnkee Date 851010 Completed by F.J. Burger SRFETY-RELATED MAINTEtMNCE Telephone (802) 257-7711 EQUIPENT teTURE OF LER OR OUTAGE MALFUNCTION CORRECTIVE ACTION PMINTEIMNCE NLMBER CAUSE RESULT

" A " Reactor Recirculation Corrective N/A Crimped wire in False isolation Bypassed crimp Pump Suction Isolation MR85-1749 the valve positior signal that tripp-Volve V2-43A circuitry ed the " A " recirc pump l

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Docket No.

50-271 Unit Vermont Yankee Date 851010 Completad by F.J. Burger Telephone (802) 257-7711 REPORT MONTH September SLMMRY OF OPERATING EXPERIENCES Hiahlights Vermont Yankee. operated at 52.9% of rated thermal power for the month.

Gross electrical generation was 195.419 MWH or 50.2% of design e

electrical capacity.

Operatina Summary l

At the beginning of the reporting period the plant was operating at 84%

of rated thermal power.

850910 At 0025 hours2.893519e-4 days <br />0.00694 hours <br />4.133598e-5 weeks <br />9.5125e-6 months <br /> the" A" reactor recirculation pump tripped (See unit outages and power reductions).

850910 At 1449 hours0.0168 days <br />0.403 hours <br />0.0024 weeks <br />5.513445e-4 months <br /> the pump was restarted following temporary repairs.

850920 At 1603 hours0.0186 days <br />0.445 hours <br />0.00265 weeks <br />6.099415e-4 months <br /> a reactor shutdown was initiated for the 1985 Refueling Outage.

850920 At 2144 the generator was removed from the grid.

At the end of the reporting cycle the plant was shut down for the 1985 Refueling Outage.

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VERhiONT YANKEE NUCLEAR POW ER CORPOR ATION P. O. BOX 157 GOVERNOR I!UNT ROAD l

l VERNON, VERMONT 05354 l

VYV 85-441 October 2,1985 l

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l U. S. Nuclear Regulatory Commission Director, Office of Management Information and Program Control Washingtor, D. C.

20555

Dear Sir:

Submitted herewith is the Monthly Statistical Report for the Vermont Yankee Nuclear Power Station for the month of September,1985.

Very truly yours, VERMONT YANKEE NUCLEAR POWER CORPORATION W

Y" Warren P. Murphy Vice President and Manager of Operations WPM /FJB/prt:MSR1.1

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