ML20112E471

Monthly Operating Rept for Feb 1985

ML20112E471
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	02/28/1985
From:	Burger F, Murphy W VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
VYV-85-124, NUDOCS 8503260578
Download: ML20112E471 (7)

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VERMONT YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 85-02 FOR THE MONTH OF FEBRUARY, 1985 I'

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8503260578 850228 i

PDR ADOCK 05000271

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OPERATING DATA REPORT Docket No.

50-271 Date 850308 Completed by F.J. Burger Telephone (802) 257-7711 OPERATING STATUS Notes:

1.

Unit Name:

Vermont Yankee 2.

Reporting Period: February 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 672.00 1416.00

12. Number of Hours Reactor was Critical 656.97 1400.97 88214.90

-13. Reactor Reserve Shutdown Hours 0.00 0.00 0.00

24. Hours Generator On-Line 651.55 1395.55 85825.62

15. Unit Reserve Shutdown Hours 0.00 0.00 0.00

16. Gross Thermal Energy Generated (MWH) 1014624.00 2195059.00 124754068.50

17. Gross Electrical Energy Generated (MWH) 344,027.00 744606.00 41534354.00

18. Net Electrical Energy Generated (MWH) 329,998.00 714406.00 39415254.00

19. Unit Service Factor 96.96 98.56 78.70

20. Unit Availability Factor 96.96 98.56 78.70

21. Unit Capacity Factor (using MDC Net) 97.43 100.10 71.71

22. Unit Capacity Factor (using DER Net) 95.54 98.16 70.31

23. Unit Forced Outage Rate 3.04 1.44 7.29

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

1985 Refuelino Outage to begin September 14, 1985 and continue throuah April 26, 1986.

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

26. Units in Test Status (prior to commercial operation):

Forecast Achieved Initial Criticality Initial Electricity Commercial Operation MSR.F1

' AVERAGE DAILY l UNIT POWER LEVEL Docket No.

50-271 Unit Vermont Yr.nkee Date 85P308 Completed by F..{. Burger Telephone (802) 257-7711

' MONTH -February DA AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY P0hER LEVEL

-_ MWe-Net)

(MWe-Net)

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1 518 17 514

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'2 427 18 519 3

495 19 519 4

'518 20 519' 5-519 21 519 6'

238 22 518 7

218 23 519 8

490 24 511 9

487 25 519 10 515 26 518 11 519 27 518 12 519 28 518 13 519 29 14 520 30 15 520 31 16' 520 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

Dockst No.

50-271-Unit Vermont Yrnkee UNIT SHUTDOWNS APO POWER REDUCTIONS Date 850308 Completed by F.J. Burger REPORT' K) NTH February 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 #

85-02 850202 S

0 B

4 N/A RB CONROD Power reduction for control rod Power pattern exchange and turbine Reduction surveillance.

85-03 850206 F

20.45 A

3 85-04 IA INSTRU.

Main Turbine trip and subsequent

. reactor scram were caused by an erroneous trip signal traced to corroded test switch contacts.

The switch was replaced.

85-04 850209 S

0 8

4 N/A RB CONR00 Power reduction for control rod Power pattern adjustment and turbine Reduction surveillance.

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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r Docket No.

50-271 Unit Vermont Yankee Date 850308 Completed by F.J. Burger Telephone (802) 257-7711 REPORT MONTH February

SUMMARY

OF OPERATING EXPERIENCES Highlights Vermont Yankee operated at 94.8 % of rated thermal power for the month. Gross electrical generation was 344,027 MWH or 94.8% of design electrical e

capacity.

Operatino 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 99.8% of rated thermal power.

850202 At 0800 hours0.00926 days <br />0.222 hours <br />0.00132 weeks <br />3.044e-4 months <br /> a power reduction was initiated for control rod &

turbine surveillance.

850202 At 1020 hours0.0118 days <br />0.283 hours <br />0.00169 weeks <br />3.8811e-4 months <br /> a return to full power was started.

850206 At 1104 hours0.0128 days <br />0.307 hours <br />0.00183 weeks <br />4.20072e-4 months <br /> the main turbine tripped and the reactor scrammed.

(See Unit Shutdowns & Power Reductions.)

850207 At 0206 hours0.00238 days <br />0.0572 hours <br />3.406085e-4 weeks <br />7.8383e-5 months <br /> the reactor was critical.

850207 At 0731 hours0.00846 days <br />0.203 hours <br />0.00121 weeks <br />2.781455e-4 months <br /> the turbine generator was phased to the grid.

At the end of the reporting period the plant was operating at 99.8% of rated

-thermal power.

MSR.F5

.,4 VERhiONT YANKEE NUCLEAR POWER CORPORATION P. O. BOX 157 GOVERNOR IIUNT ROAD VERNON, VERMONT 05354 VYV 85-124 March 8,1985 U. S. Nuclear Regulatory Commission Director, Office of Management Information and Program' Control Washington, D. C.

20555 Daar Sir:

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

Very truly yours, VERMONT YA*EE NUCLEAR POWER CORPORATION b

4e t~s Vice President and (v Warren P. Murphy j

Manager of Operations WPMNJB/pt:MSR1.1

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