ML20214C385

Monthly Operating Rept for Apr 1987

ML20214C385
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	04/30/1987
From:	Murphy W, Wallin G VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC
References
VYV-87-108, NUDOCS 8705200689
Download: ML20214C385 (6)

Text

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s VERMONT YANKEE NUCLEAR POWER STATION MONTH.Y STATISTICAL REPORT 87-04 FOR TtE MONTH OF. APRIL,1987 4

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1E19 B705200689 870430 i

PDR ADOCK 05000271 PDR i L/1 R

OPERATING DATA REPORT-DOCKET NO.

50-271 DATE 870510 COMPLETED BY G.A. Wallin TELEPHONE (802) 257-7711-OPERATING STATUS Notes:

1.

Unit Names Vermont Yankee 2.

Reporting Period:

April 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

3 ower level to which restricted, if any (Net MWe): N/A P

10. Reasons for restrictions, if any:

N/A This month Yr-to-Date Cumulative

11. Hours in Reporting Period 719.00 2879.00

12. Number of Hours Reactor was Critical 719.00 2879.00 100349.73

13. Reactor Reserve Shutdown Hours 0.00 0.00 0.00

14. Hours Generator On-Line 713.68 2873.68 97852.37

15. Unit Reserve Shutdown Hours 0.00 0.00 0.00

16. Gross Thermal Energy Generated (MWH) 1095301.00 4511940.50 143187581.00

17. Gross Electrical Energy Generated (MWH) 369379.00 1529019.00 47657853.00

18. Net Electrical Energy Generated (MWH) 353972.00 1466678.00 45225354.00

19. Unit Service Factor 99.26 99.82 76.42

20. Unit Availability Factor 99.26 99.82 76.42

21. Unit Capacity Factor (using MDC Net) 97.68 101.08 70.08

22. Unit Capacity Factor (using DER Net) 95.78 99.11 68.72

23. Unit Forced Outage Rate 0.74 0.18 6.51

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

1987 Refueling Outage scheduled to begin on August 8,1987 and continue through October 2,1987.

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 COMERCIAL OPERATION

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1 AVERAGE DAILY UNIT POWER LEVEL-DOCKET NO.

50-271~

. UNIT Vermont Yankee DATE 870510

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COMPLETED BY G.A. Wallin TELEPHONE (802) 257-7711 m-MONTH ADEil DAYJ AVERAGE DAILY POWER LEVEL DAY

. AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Net)'

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-512 17 516 2

515 18 517 3

520 19 499 4

264 20 516

-c:n,

-.*5 302 21 516 6

453 22 516

7 419

. 23 515 8

486 24 515 9

518 25' 516

-10 518-26 457

-11 518-27-514 l

12 514 28 515

-( :

.13 517 29 515 14 517 30 516 15 517 31 16 517

• - 23 hour2.662037e-4 days <br />0.00639 hours <br />3.80291e-5 weeks <br />8.7515e-6 months <br /> day.

. INSTRUCTIONS:

On this format, list the average daily unit power level in MWe-Net for each day in the reporting month. Compute to the roarest whole megawatt.

VYDPF 0411.02 Original

DOCKET NO3 50-271 UNIT NAME Vermont Yankee UNIT SHUTDOWNS AND POWER REDUCTIONS DATE 870510 COMPLETED BY G. A. Wallin REPORT MONTH April TELEPHONE (802) 257-7711 1

2 3

4 5

No.

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

Shutting Down Event Code Code Prevent Recurrence Reactor Report +

87-04 870404 S

0.00 B

4 N/A RB ZZZZZZ Power reduction for Turbine Power Bypass Valve testing.

Reduction

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87-04 870404 S

0.00 B,H*

4 N/h RB CONROD Power reduction for a Control Power Rod Pattern Exchange and i

Reduction surveillance testing.

87-05 870404 F

5.32 8

4 N/A CC PIPEXX Power reduction to investigate Power and repair a pinhole leak off the Reduction "B" Turbine Control Valve above the seat drainline.

1 2

3 4

F-Forced A-Equipment Failure (Explain)

Method:

Exhibit G - Instructions S-Schtduled 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

VYDPF 0411.03 G-Operational Error (Explain)

Exhibit I - Same Source Original

• H-Other (Explain) - Control Rod Pattern Exchange O

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DOCKET NO.

50-271 UNIT Vermont Yankee DATE 870510 COMPLETED BY G.A. Wallin TELEPHONE (802) 257-7711 REPORT MONTH April SLM4ARY OF OPERATING EXPERIENCES Hiablights Vermont Yankee operated at-95.6% of rated thermal power for the month.

Gross electrical generation was _369,379 MWH or 95.1% of design-e electrical capacity.

Operatina' 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 99.9% of.

rated thermal power.

870401 At 1450 hours0.0168 days <br />0.403 hours <br />0.0024 weeks <br />5.51725e-4 months <br />, transferred to a hybrid cycle of operation in order to remove river. debris from the intake structure.

.870402 At 1031 hours0.0119 days <br />0.286 hours <br />0.0017 weeks <br />3.922955e-4 months <br />, returned to an open cycle of operation.

870404 At 0830 hours0.00961 days <br />0.231 hours <br />0.00137 weeks <br />3.15815e-4 months <br />, decreased power to 80% for Turbine Bypass Valve testing.

(See Unit Shutdowns and Power Reductions).

870404 At 0845 hours0.00978 days <br />0.235 hours <br />0.0014 weeks <br />3.215225e-4 months <br />,~ completed Turbine Bypass Valve testing. ' Reduced power to minimum recirculation flow.

870404 At 0912 hours0.0106 days <br />0.253 hours <br />0.00151 weeks <br />3.47016e-4 months <br />, initiated control rod exercising and turbine surveillance.

870404 At 1055 hours0.0122 days <br />0.293 hours <br />0.00174 weeks <br />4.014275e-4 months <br />, completed control rod exercising and turbine surveillance;-initiated a rod pattern exchange.

(See Unit Shutdowns and Power Reductions.)

870404 At 1157 hours0.0134 days <br />0.321 hours <br />0.00191 weeks <br />4.402385e-4 months <br />, completed the rod pattern exchange.

870404 At 1330 hours0.0154 days <br />0.369 hours <br />0.0022 weeks <br />5.06065e-4 months <br />, reduced power to 22% to investigate a minor steam leak.

(See Unit Shutdowns and Power Reductions.)

870404 At 1730 hours0.02 days <br />0.481 hours <br />0.00286 weeks <br />6.58265e-4 months <br />, the generator was removed from the grid.

870404 At 2249 hours0.026 days <br />0.625 hours <br />0.00372 weeks <br />8.557445e-4 months <br />, the turbine / generator was phased to the grid and a return to full power was initiated.

At the end of the reporting period, the plant was operating at 99.9% of rated thermal power.

VYDPF 0411.04 Original-l

VERMONT YANKEE NUCLEAR POWER CORPORATION P. O. BOX 157 GOVERNOR IIUNT ROAD VERNON, VERMONT 05354 VYV 87-108 May 10, 1987 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 April, 1987.

Very truly yours, VERMONT YANKEE NUCLEAR POWER CORP.

dett M

Warren P. Murphy Vice President a d Manager of Operations WPM /tlAW/gmv:MSR1.1/MSR VYDPF 0411 Original

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