ML20049A781

Monthly Operating Rept for Aug 1981.Narrative Rept Encl

ML20049A781
Person / Time
Site:	Nine Mile Point
Issue date:	09/08/1981
From:	Roman T NIAGARA MOHAWK POWER CORP.
To:
Shared Package
ML20049A773	List: ML20049A772 ML20049A781
References
NUDOCS 8110020263
Download: ML20049A781 (4)

Text

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i NIAGARA MOHAWK POWER CORPORATION i

NINE MILE POINT NUCLEAR STATION UNIT #1 NARRATIVE OF OPERATING EXPERIENCE August 1981

' he Station operated during the month of August with a monthly avail-ability factor of 100% and a net design electrical rating capacity factor of 93.9%. Capacity factor losses were mainly due to high con-denser cooling water temperatures and resultant low condenser efficiency.

Specific capacity factor losses were due to the following:

On August 16 an air operated main steam isolation valve outside primary containment failed to operate in the test circuitry mode during the bi-weekly partial closure surveillance test. Unit load was reduced to approximately 55% and the redundant motor operated valve inside the primary containment was closed, thus removing the one steam line from service. The affected valve was then fully stroked and then partially stroked in the test mode satisfactorily. The steam line was returned to service and power was restored within preconditioning limitations.

On August 27 a motor operated main steam isolation valve inside the primary containment failed to test satisfactorily in the test circuitry mode during the performance of the biweekly surveillance test as above.

Unit load was reduced to approximately 70%, and the valve was partially stroked out of the test circuitry mode satisfactorily. Power level was again restored within preconditioning limitations.

CLASS I WORK - MAINTEN.*J4CE - AUGUST 1981

1. 16851 - Replaced cooling water heat exchangers nn J102

#16998 - Replaced CRD #71494 I #16990 - Replaced CRD #7092

#16995 - Replac2d CRD #71627

1. 16985 - Repir :ed CRD #71630 .

CL%S I WORK - INSTRUMENTATION AND CONTROL - AUGUST 1981 l #15020 - #11 Emergency ventilation radiation monitor causing alarms-replaced senior converter unit

1. 16493 - LPRM-12-17C Flux Amp replaced electromitor (VI)

CLASS I WORK - ELECTRICAL - AUGUST 1981 I

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1. 16805 - Tightened screw on BBJ-12 in K panel N1-MST-M1 Mo. Battery Readings 8110020263 010909 ,

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OPERATLNG DATA REPORT DOCKETNO. 50-220 DATE 9/8/81

. COMPLETED BY T. Roman TELEPilONE (119 141-2110

. X1383 OPER ATING ST/.TUS

'. Unit Name: Nine. Mile Point #1 Notes 06/01/61 - os/ 31/o;

2. Reporting Period:

3. Licensed Thermal Power (MWt): 1850

4. Namepiste Rating (Gross MWe): 640

5. Design Electrical Rating (Net MWe): 620 i 6. Maximum Dependsble Capseity (Gross MWe): 630

7. Maximum Dependable Capacity (Net MWe):

M0

8. If Chan;es Occur in capacity Ratings (Items Number 3 Through 7)Since Last Report. Give Elsons: *

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

10. Reasons For Restrictions.lf Any:

This Month . Yr..to.Dste Cumulatise

11. Hours in Reporting Pen.o d 744.0 5,831.0 103,727.0

/44.U 2,940.4 76,505.5

12. Number Of Hours Resetor Was Critics!

13. Resetor Reserve Shutdown Hours 0.0 0.0 1.204.2

14. Hourt Generator On Line 744.0 2,852.2 7'3.760.8

15. Unit Rewrve Shutdown Hours 0.0 0.0 20.4

16. Gross Thermal Energy Genersted (MWH) 1,358,299.0 4,738,972.0 120,596,481.0

17. Gross Electrical Energy Genersted (MWH) 446,733.0 1.561,157.0 39,760,073.0

. 18. Net Electrics! Energy Generated (MWH)

'+4J,016.0 , 1,509,762.0 38,497.890.0 i 19. Unit Service Factor 100.0 og A 71_1

20. Ur:it Avsilsbility Factor 100.0 48.9 71.1

31. Unit Capseity Factor (Usin;: MDC Net) -

95.4 42.4 60.8

22. Unit Capacity Factor (Using DER Net) 93.9 41.8 - 59.9

23. U.;;; Torced Outsge Rate 0.0 3.5 8.6 -

24. Shutdowns Scheduled Oser Next 6 Months Type.Date.si.J Duration of Esch::

25. If Shut Down At End Of Report Period. Estimated Date of Sisttup:

26. Units in Test Status (Prior o Commercial Operati on): Forcesst Achies ed INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION

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• AVER \GE DAILY L' NIT POhER LEVEL ,

DOCKET NO. 2227 WIT Nine Mile #1

. DATE 9/8/81 COMPLETED BY T. Roman TELEPilONE - (3155 343-2110 X1383 AlONTH Aucust 1981

• DAY AVERAGE DAILY POWER LEVEL.i DAY AVERAGE DAILY POWER LEVEL IMWe NetI (MWe-Net i I 999 580 37 2 9A1 gg sgg 3 579 19 588 4 579 587 20 5 581 587 21 585 586 6

7 590 585 23' s 590 580 34 9

585 587 -

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10 26 In 585 574 -

3-589 589 12 ,

I 583 588 I3 29 584 593

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14 30 15 582' 31 .588 16 497 l

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INSTRUCTIONS On this format.hst the average dany unit power lesel in MWe-Net for each day in the rep.'aimp m.mth. Compute 4.3

! the nearest whole mepws s.

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