ML19256F261

Monthly Operating Rept for Nov 1979

ML19256F261
Person / Time
Site:	Maine Yankee
Issue date:	12/12/1979
From:	Sjogren R Maine Yankee
To:
Shared Package
ML19256F260	List: ML19256F259 ML19256F261
References
NUDOCS 7912180389
Download: ML19256F261 (5)

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a MAINE YANKEE NUCLEAR POWER STATION WNTHLY STATISTICAL REPORT 79-11 FOR THE MONTH OF NOVEMBER, 1979 O

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DOCKETNo. 50-309 DATE 791212 COSIPLETED BY R. M. Sjogren TEl.EPiiONE (61, J 360-9011 X2281 OPERATING STATUS

1. Unit Name:

Maine Yanicee Notes

2. Reportins Period:

November 1979

3. Licensed Thermal Power (31Wt):

2,630

4. Namepiste Rating (Gross 31We):

864

5. Design Electrical Ratin2 (Net 31We):

825 850

6. Sf aximum Dependable Capacity (Gross 31We):

810

7. Slaximum Dependable Capacity (Net 31We):

8. If Changes Occur in Capacity Ratings (Items Ndrnber 3 Through 7) Since Last Report. Give Reasons:

9. Power LevelTo Which Restricted.!f Any(Net 31We):

864 (97%)

10. Reasons For Restrictions.If Any:

Power level' restricted by steam flow through the LP turbines.

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This Stonth Yr..to.Date Cumulative i

11. Hours!n Reportin2 eriod 720 8,016 P

705.5 5,422.4 50,466

12. Number Of Hours Reactor Was Critical

13. Reactor Resene Shutdown Hours 0.0 0.0 20.0 14, Hours Generator On.Line 701.7 5,250.6 48,773.8

15. Unit Reserve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (31WH) 1.759.695 12,616,114 103,740,475

17. Gross Electrical Energy Generated (31WH) 586,160 _,

4,202,270 34,070,080

18. Net E!ectrical Energy Generated (31WH) 559,891 4,063,331 32,351,503

19. Unit Service Factor 97.5 65.5 78.8

20. Unit Availability Factor 97.5 65.5 78.8

21. Unit Capacity Factor (Using alDC Net) -

96.0 62.6 68.0

22. Unit Capacity Factor (Using DER Net) 94.3 61.4 65.7

23. Unit Forced Outage Rare 2.5 28.1 7.0

24. Shutdowns Scheduled Over Next 6 Slonths (Type.Date.and Duration of Eachl:

Refueling 1-11-80

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 INITIA L ELECTRICITY CO3131ERCIAL OPERATION

'(9/77) 1608 W

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AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.

50-3C9 UNIT Maine Yankee 791212 DATE COSIPLETED BY R. M. Siogren TELEPHONE (617) 366-9011 X2281 a!0 NTH November 1979 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DA!LY POWER LEVEL (31We Net)

(alwe-Net) g 787 815 37 2

818 gg 812 3

816 39 814 20 816 4

819 5

434 816 21 6

191 814 22 7

798 815 23 8

811 24 814 9

810 25 813 10 810 814 26 II 811 813 27 12 811 813 28 13 814 810 29 14 806 774 30 IS 820 3;

16 818 INSTRUCTIONS On this format, list the average daily unit power level in 51We-Net for each day in the reporting month. Compute to the nearest whole megawatt.

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4 DOCKET NO.

50-309 UNIT Maine Yankee DATE 791212 COMPLETED BY R. M. Sjogren TELEPHONE (617) 366-9011 X2281 REPORT MONTH November 1979 SU2IARY OF OPERATING EXPERIENCES At the beginning of the month the plant was in the process of load re-duction to 80% to permit securing a circulating water pump in order to clean debris off the Amertap condenser cleaning outlet screens.

By 0940 hours0.0109 days <br />0.261 hours <br />0.00155 weeks <br />3.5767e-4 months <br /> on 11/1/79 the debris had been removed and the plant was back at full load (%97%) limited by steam flow through the LP turbines.

On 11/5/79 an electrical spike generated while troubleshooting the electrical " noise" problem in the RPS, resulted in a spuricus TM/LP reactor trip. All systems responded normally to the trip and the plant returned to power on the following day.

For the remainder of the month the plant operated at essentially full load until 11/29/79. By this time RCS boron concentration had decreased to 15 ppm and it was decided to let power decrease down to 2400 MWth as a part of the core coastdown program.

At the end of the month, power was being held at 2400 MWth by allowing Tc to drift down providing the necessary positive reactivity to. hold reactor power constant. Electrical output is decreasing as a function of the decreasing Tc.

The plant is in a coastdown condition as the end of core Cycle 4 approaches. Refueling is presently scheduled to com-mence on 1/11/80.

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