ML20237C635

Monthly Operating Rept for July 1998 for Nine Mile Point Nuclear Station,Unit 1

ML20237C635
Person / Time
Site:	Nine Mile Point
Issue date:	07/31/1998
From:	Coleman D, Rich Smith NIAGARA MOHAWK POWER CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NMP91475, NUDOCS 9808240036
Download: ML20237C635 (5)

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. 1 NIAGARA MOH WK G E N E R ATIO N "" " ""*'^"*""^"** """*'* "

BUSINESS GROUP August 14, 1998 NMP91475 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555 RE: Nine Mile Point Nuclear Station Unit #1 Docket No. 50-220 DPR-63

Subject:

Operating Statistics and Shutdowns - July 1998 Gentlemen:

Submitted herewith is the Operating Data Report, Unit Shutdowns and Power Reductions, and a Narrative of Operating Experience for July 1998 for the Nine Mile l Point Nuclear Station Unit #1. Submittal of this information complies with Section 6.9.1.c of the Unit #1 Technical Specifications.

i l 4 Very truly yours, AAc/d M Robert G. Smith

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I Plant Manager - NMP1

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l Enclosures 7,f pc: H.J. Miller, Regional Administrator, Region 1 B.S. Norris, Senior Resident inspector

! 9008240036 980731 ADOCK 05000220 PDR R PDR L _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ -

j OPERATING DATA REPORT DOCKET NO.: 50-220 DATE: 8/07/98 f

PREPARED BY: D. E. Coleman l TELEPHONE: (315) 349-2558 OPERATING STATUS

1. Unit Name: Nine Mile Point Unit #1

2. Reponing Period: July 1998 Notes

3. Licensed Thermal Power (MWt): 1850

4. Nameplate Rating (Gross Mwe): 642

5. Design Electrical Rating (Net Mwe): 613

6. Maximum Dependable Capacity (Gross Mwe): 584

7. Maximum Dependable Capacity (Net Mwe): 565

8. If Changes Occur in Capacity Ratings (Items Number 3 through 7) Since Last Repon, Give Reasons:

9. Power Level To Which Restricted, If Any (Net MWe):

10. Reasons Fer Restrictions, If Any:

This Month ' Yr-to-Date Cumulative

11. Ilours in Reponing Period 744.0 5087.0 253,104.2 j

12. Number of Ilours Reactor Was Critical 744.0 4436.2 171,438.6 4

13. Reactor Reserve Shutdown llours 0 0 1,264.2

14. Ilours Generator On-Line 744.0 4412.3 167,391.1 l

15. Unit Reserve Shutdown llours 0 0 20.4

16. Gross Thermal Energy Generated (MWii) 1,365,371.0 8,067,070.0 285,541,816.0 17 ~ Gross Electrical Energy Generated (MWH) 441,714.0 2,726,636.0 95,079,529.0

18. Net Electrical Energy Generated (MWII) 429,142.0 2,654,555.0 92,214,683.0

19. Unit Service Factor 100.0 86.7 66.1 l

20. Unit Availability Factor 100.0 86.7 66.1

21. Unit Capacity Factor (Using MDC Net) 102.1 92.4 60.5

22. Unit Capacity Factor (Using DER Net) 94.1 85.1 58.8

23. Unit Forced Outage Rate 0.0 13.3 22.6

24. Shutdowns Scheduled Over Next 6 Months (Type, Date and Duration of Each):

25. If shutdown At End of Repon Period, Estimated Date of Startup:

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OPERATING DATA REPORT NINE MILE POINT UNIT 1 DOCKET NO.: 50-220 i DATE:8/07/98 PREPARED BY D. E. Coleman TELEPilONE: (315) 349-2558 I MONTil July 1998 l

t DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL l (Mwe-Net) (Mwe-Net) 1 585 17 573 2 588 18 576 3 586 19 .577 4 585 20 576 l l '5 583 - 21 576

.6- 583 22 576 l

7 494 23 577 -

8 583 24 576 l 9- 583 25 578 -

10 . - 579 26 577 11 580 27 579 12 583 28 577 13 584 29 577 14 579 30 578 15 580 31 579 16 577 INSTRUCTIONS j 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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• NIAGARA MOHAWK POWER CORPORATION l l NINE MILE POINT NUCLEAR STATION UNIT #1 ).

NARRATIVE OF OPERATING EXPERIENCE The plant operated during the month of July 1998 with a Unit Availability Factor of 100.0% and a Net Design Electrical Capacity Factor of 94.1%. Reductions in Capacity Factor were due to elevated lake temperatures and corresponding reductions in plant i efficiency. On July 7,1998, the unit commenced a Technical Specification required

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shutdown due to a failed surveillance associated with reverse flow testing of a core spray keepfill supply check valve. The shutdown was terminated later that day upon successful re-performance of the surveillance.

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