ML20210A931

Monthly Operating Rept for Aug 1986

ML20210A931
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	08/31/1986
From:	Murphy W, Wallin G VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
VYV-86-297, NUDOCS 8609170396
Download: ML20210A931 (6)

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i VERMONT YAfEEE NUCLEAR POWER STATION 1.

I MONTHLY STATISTICAL REPORT 86-08 i

1-FOR THE K) NTH OF AUGUST,1986 l

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i 8609170396 860831

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OPERATING D4TA REPORT DOCKET FO.

'50-271 DATE 860910 COMPLETED BY G.A. Wallin TELEPHONE (802) 257-7711 OPERATING STATUS Notes:

1.

Unit Name:

Vermont Yankee 2.

Reporting Period:

August 3.

Licensed Thermal Power (MWt):

1593 4.

Nameplate Rating (Gross MWe):

540 5.

Design Electrical Rating (Het MWe):514(oc) 504(cc) 6.

Maximum Dependable Capacity (Gross MWe):

535 7.

Maximum Depandable 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

12. Number of Hours Reactor was Critical 744.00 1458.55 94569.61

13. Reactor Reserve Shutdown Hours 0.00 0.00.

0.00

14. Hours Generator On-Line 744.00 1392.57 92110.92

15. Unit Reserve Shutdown Hours 0.00 0.00 0.00

16. Gross Thermal Energy Generated (MWH) 1164504.00 2079592.50 134189223.50

17. Gross Electrical Energy Generated (MWH) 378400.00 669365.00 44625267.00

18. Net Electr* cal Energy Generated (MWH) 354824.00 626549.00 42326799.00

19. Unit Service Factor 100.00 23.88 75.36

20. Unit Availability Factor 100.00 23.88 75.36

21. Unit Capacity Factor (using MDC Net) 94.63 21.32 68.71

22. Unit Capacity Factor (using DER Net) 92.78 20.90 67.37

23. Unit Forced Outage Rate 0.00 0.00 6.83

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

NA

25. If shut down at end of report period. estimated date of startup:

NA

26. Units in Test Status (prior to commercial operation): N/A Forecast Achieved INITIAL CRITICALITY VYDPF 0411.01 INITIAL ELECTRICITY 0riginal ComERCIAL OPERATION

b AVERAGE DAILY. LNIT POWER LEVEL DOCKET PO.

50-271 UNIT Vermont Yankee DATE 860910 CO R ETED BY G.A. Wallin TELEPHOPE (802) 257-7711 K) NTH Auoust ~

. DAY AVERAGE' DAILY POWER LEVEL-DAY AVERAGE 04ILY F0WER LEVEL (MWe-Net)

(MWe-Net) 1 484' 17 475 1

2 481 18-482 3

478 19 431 4

484 20 310 5

~485 21 465 l

6 485

.22 486 7

482 23 488 8

483 24 484 9

484 25 489 i

1 10 478

'26 489 11 482 27 483 4

12 488' 28 492 4

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13 488 29 493 1

14 488 30 493 i

15 485 31 488 16 482 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.

VYDPF 0411.02 i

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DOCKET 2.

50-271 UNIT FRME V.trmont Yankee.

UNIT SiUT00WNS AND POWER REDUCTIONS D4TE 860910 COW 4.ETED BY G. A. Wallin REPORT >0 NTH August TELEPIONE (802) 257-7711 1

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No.

Date Type Duration Reason Method of License System Component Cause and Corrective Action to (hours)

Shutting Down Event Code Code Prevent Recurrence Reactor Report #

1 86-04 860819 F

0.00 A

4 NA CB INSTRU A faulty vibration switch caused Power a high vibration alarm on the

'B' Reduction recirc pump motor.

86-05 860819 F

0.00 A

4 NA CB INSTRU A faulty upper oil level switch Power caused a hi/lo alarm on the Reduction

'B' recirc pump motor.

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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 0-Regulatory Restriction 3-Automatic Scram Report (LER) File (NUREG 0161)~

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

F-Administrative 5

2 VYOPF 0411.03 G-Operational Error (Explain)

Exhibit I - Same Source Original H-Other (Explain) 4 4

DOCKET N).

50-271 UNIT Vertront Yankee DATE 860910 COMPLETED BY G.A. Wallin TELEPHONE (802) 257-7711 REPORT M) NTH August SLNMARY OF OPERATING EXPERIENCES Hiahlights Vermont Yankee operated at 98.3% of rated thermal power for the month.

Gross electrical generation was 378,400 MWH or 94.2% of design e

electrical capacity.

Operating Summary The following is a chronological description of plant operations including other pertinent items'of interest.for the months At the'beginning of the reporting period the plant was operating at 99.9% of rated thermal power.

860819 At 1600 hours0.0185 days <br />0.444 hours <br />0.00265 weeks <br />6.088e-4 months <br />, a power reduction.was initiated due to' a high vibra-tion alarm on the "B" recirculation pump motor.

860819 At 1715 hours0.0198 days <br />0.476 hours <br />0.00284 weeks <br />6.525575e-4 months <br />, the "B" recirculation puinp was manually tripped.

860819 At 1737 hours0.0201 days <br />0.483 hours <br />0.00287 weeks <br />6.609285e-4 months <br />, the "B" recirculation pump was restarted and power was increased.

860819 At 2015. hours, a second power reduction was intilated due to a high level lube oil alarm on the "B" recirculation pump motor.

860819 At 2025 hours0.0234 days <br />0.563 hours <br />0.00335 weeks <br />7.705125e-4 months <br />, the "B" recirculation pump was manually tripped again.

860820 At 1243 hours0.0144 days <br />0.345 hours <br />0.00206 weeks <br />4.729615e-4 months <br />, the B" recirculation pump was restarted.

860820 At 1430 hours0.0166 days <br />0.397 hours <br />0.00236 weeks <br />5.44115e-4 months <br />, a power increase was initiated.

At the end of the reporting period the plant was operating at 99.2% of

. rated thermal power.

VYDPF 0411.04 Original i

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VERMONT YANKEE NUCLEAR POWER CORPORATION P. O. BOX 157 GOVERNOR IIUNT ROAD VERNON, VERMONT 05354 ViV 86-297 September 10, 1986 i

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 Nuclear Power Station for the. month of August,1986.

Very truly yours, VERMONT YANKEE NUCLEAR POWER CORP.

W u

Vice President and Manager of Operations WPM / TAW /lat:MSRI.1A45R VYDPF 0411 Original O

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