BVY-98-098, Monthly Operating Rept for June 1998 for Vermont Yankee Nuclear Power Station

Monthly Operating Rept for June 1998 for Vermont Yankee Nuclear Power Station

ML20236M349
Person / Time
Site:	Vermont Yankee
Issue date:	06/30/1998
From:	Balduzzi M, Wallin G VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
BVY-98-098, BVY-98-98, NUDOCS 9807140033
Download: ML20236M349 (6)

Text

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I VERMONT YANKEE j

-NUCLEAR POWER CORPORATION I I

1 P.O. Box 157, Govemor Hunt Road Vemon, Vermont 05354-0157

.(802) 257-7711 July 10,1998 i BVY-984)98 United States Nuclear Regulatory Commission KITN: Document Control Desk Washington, D.C. 20555

Reference:

(a) License No. DPR-28 (Docket No. 50-271)

. In accordance with section 6.7.A.3 of the Vermont Yankee Technical Specifx:ations, submitted herewith is the Monthly Statistical Report for the Vermont Yankee Nuclear Power Station for the month of June.1998.

Sincerely, VERMONT YANKEE NUCLEAR POWER CORPORATION l

/bWW/Y fW

, Michael A. Balduzzi j

Plant Manager ,

l cc: USNRC Region I Administrator USNRC Resident Inspector - VYNPS . 'g.Q l USNRC Project Manager - VYNPS '

Vermont Department of Public Service 9907140033 900630 "

l PDR ADOCK 05000271 L

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VERMONT YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 98-06 FOR THE MONTH OF JUNE 1998 i

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OPERATING DRTA REPORT DOCKET NO.50-271 DATE 980710 COMPLETED BY G.A. WALLIN TELEPHONE (802)258-5414 OPERATING STATUS ,

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1. Unit Name: Vermont Yankee

2. Reporting Period: June

3. Licensed Thermal Power (MWt):1593

4. Nameplate Rating (Gross MWe): 540

5. Design Electrical Rating (Net MWe): 522

6. Maximum' Dependable Capacity (Gross MWe): 535

7. Maximum Dependable Capacity (Net MWe): 510

8. If changes, occur in capacity ratings (Items Number 3 through 7) since last report,-give reasons:

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9. Power level t.o which restricted, if any(Net MWe) : N/A

30. Reasons for restrictions, if any: N/A 4

This Month Yr-to-Date Cumulative l

11. Hours in Reporting Period 720.00 4343.00 223487.00 I

'12. Number Of Hours Reactor was Critical 622.40 2506.00 185885.98

13. Reactor Reserve Shutdown Hours 0.00 0.00 0.00

14. Hours Generator On-Line 530.16 2412.99 182446.86

15. Unit Reserve Shutdown Hours 0.00 0.00 0.00

16. Gross Thermal Energy Generated (MWH) 759068.10 3566168.30 274340072.20

.17. Gross Electrical Energy Generated (MWH) 253753.00 1217890.00 91741674.00

18. Net Electrical Energy Generated (MWH) 241326.00 1166303.00 87249058.00 l

19. Unit Service Factor 73.60 55.60 80.80 20.-Unit. Availability Factor 73.60 55.60 80.80

21. Unit Capacity _ Factor (Using MDC Net) 65.70 52.70 76.50  ;

, 22. Unit Capacity Factor (Using DER Net) 64.20 51.40 75.00 l-

-23. Unit Forced Outage Rate 18.89 4.87 4.57

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

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 l Forecast Achieved INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION VYDPF 0411.01 (Sample)

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AVERAGE. DAILY UNIT POWER LEVEL DOCKET NO. 50-271 UNIT Vermont Yankee DATE 980710 COMPLETED BY G.A. WALLIN TELEPHONE (802)258-5414 MONTH June DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net)

1. 0 17. 507

2. 0 18. 501

3. 13 19. 519

4. 226 20. 525 5 ~. 260 21. 525

6. 384 22. 524

7. 443 23. 524

8. 475 24. 521

9. 24 25. 520

10. 0 26. 517

11. 0 27. '522

12. 0 28. 524

13. 0 29. 524 14 84 30. 524

'15. -387 31. -

16. 484 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.

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' DOCKET NO. 50-271 DATE 980710 COMPLETED BY 'G.A. WALLIN TELEPHONE ,802)258-5414

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REPORT MONTH June

SUMMARY

OF OPERATING EXPERIENCES Highlights

. Vermont. Yankee operated at 66.2% of rated thermal power for the month.

Gross electrical generation was 253,753 MWHe or 64.5% 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 0.00%

of-rated thermal power.

980601 At 0350 hours0.00405 days <br />0.0972 hours <br />5.787037e-4 weeks <br />1.33175e-4 months <br />, the reactor was critical.

980603 At 1539 herrs, the turbine-generator was phased to the grid.

-980603 At 2110 neurs, the turbine-generator was removed from the grid.

980603 At 2353 hours0.0272 days <br />0.654 hours <br />0.00389 weeks <br />8.953165e-4 months <br />, the turbine-generator was phased to the grid, and a return to full power was initiated. (See Unit Shutdowns and Power Reductions)

'980609 At 0135 hours0.00156 days <br />0.0375 hours <br />2.232143e-4 weeks <br />5.13675e-5 months <br />, the turbine tripped and reactor scrammed due to high reactor water level. (See Unit Shutdowns and Power

! Reductions) 980612 At 2321 hours0.0269 days <br />0.645 hours <br />0.00384 weeks <br />8.831405e-4 months <br />, the reactor was critical.

l 980614 At 0503 hours0.00582 days <br />0.14 hours <br />8.316799e-4 weeks <br />1.913915e-4 months <br />, the turbine-generator was phased to the grid, ano a return to full' power was initiated.

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

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