Text

Monthly Operating Rept for Nov 1979
	ML19256F275
Person / Time
Site:	Vermont Yankee
Issue date:	12/12/1979
From:	Sjogren R; VERMONT YANKEE NUCLEAR POWER CORP.
To:	;
Shared Package
ML19256F272	List: ML19256F271; ML19256F275;
References
	NUDOCS 7912180407
	Download: ML19256F275 (8)
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VERMONT YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 79-11 FOR THE MONTH OF NOVEMBER,1979 1608 187 791218 t) #-[ d @

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OPERATING DATA REPORT DOCKET NO. 50-271 DATE 791212 CO3tPLETED BY R M- Slogren TELEPHONE (017) 306-9011 X2281 OPERATING STATUS Vermont Yankee Not*5

1. Unit Name:

2. Reporting Period: November 1979 1,593

3. Licensed Thermal Power (31Wt):

4. Nameplate Rating (Gross 31We): 540

5. Design Electrical Rating (Net 31We): 514 (open cycle) 504 ( closed cycle)

6. Sfaximum Dependable Capacity (Gross 31We): 535

7. Sf aximum Dependable Capacity (Net 31We): 504 -

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

9. Power Level To Which Restricted. If Any (Net 31We):

10. Reasons For Restrictions.If Any:

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This 3fonth YrAo.Date Cumulative i .

11. Hours In Reportin2 Period 720 8,016

12. Number Of Hours Reactor Was Critical 673 6,524.6 50,414.4

13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0 14, Hours Generator On Line 636 6,450.8 . 48,583.8

15. Unit Reserve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (31WH) 914.100 9.672.791.5 68.059,610 .

17. Gross Electrical Energy Generated (31WH) 310,002 ,_, 3,229,696 22,569,164

18. Net Electrical Energy Generated (J.!WH) 297.366 3,064,240 21,383,763

19. Unit Service Factor 88.3 80.3 77.1

20. Unit Availability Factor 88.3 80.3 77.1 -

21. Unit Capacity Factor (Using 31DC Net) - 81.9 75.8 67.3

22. Unit Capacity Factor (Using DER Net) 80.4 74.4 66.0

23. Unit Forced Outage Rate 1.9 1.7 6.6

24. Shutdowns Scheduled Over Next 6 Stonths (Type. Date.and Duration of Each1:

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

26. Units in Test Status (Prior to Commercial Operation): Forecast Achieved INITIA L CRITICALITY <

. INITIAL ELECTRICITY CONT 31ERCIAL OPERATION

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1608 188 m,3

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-271 UNIT Vermont Yankee DATE 791212 C05tPLETED BY R. M. Sjogren TELEPHONE (617) 366-9011 X2281 510 NTH November 1979 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (51We-Net) (S!We-Net) 0 37 445 2 0 g3 518 3 5 39 480 4 135 20 210 5 262 21 491 6 310 22 523 k 7 362 23 525 .

8 444 24 525 9 478 25 519 10 515 26 512 11 509 27 523 12 507. 23 525 13 506 29 527 14 508 30 526 15 507 3g 16 495 INSTRUCTIONS On this format. list the average daily unit power level in S!We. Net for each day in the reporting month. Compute to the nearest whole mepwatt.

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DOCKET NO. 50-271 A

UNIT Vermont Yankee p DATE 791212 CO C0!4PLETED BY R. M. Sjogren CD C

TELEP110NE (617) 366-9011 REPORT MONTil November 1979 X2281 SAFETY RELATED !!AINTENANCE SilEET 3 of 3 NATURii OF LElt OR Ulfi' AGE MALFUNCTION EQUIP!!!!NT MAINTENANCE NUllBER CAUSE RESULT CORRECTIVE ACTION "A" RWCU Pump Suction Corrective NA Loose Flange Leakage Tightened Flange Flange MR79-1024 "B" RWCU Pump Suction Corrective NA Loose Flange Leakage Tightened Flange Flange MR79-1040 RilR Valve V10-65A Corrective NA Worn Packing Leakage Tightened Packing MR79-1045 Voltage Balance Relay for Corrective NA Mechanical Binding Relay Would Not Aligned Reset Mechanism the Emergency Diesel MR79-1061 of the Reset Reset Generators Mechanism -

DOCKET NC. 50-271 UNIT Vermont Yankee DATE 791212 COMPLETED BY R. M. Sjogren

. TELEPHONE (617) 366-9011 X2281 '

REPORT MONTH November 1979 SIED!ARY OF OPERATING EXPERIENCES Highlights Vermor.t Yankee operated at 79.7% of rated thermal power for the month of November, 1979. Gross electrical generation for the month was 310,002 MWHe, or 79.7% of design electrical capacity.

Operations Summary The following is a chronological description of plant operations including other pertinent items of interest for the month:

11-1 At the beginning of this report period, the plant was in the shutdown mode for refueling.

11-2 At 1445 hours0.0167 days 0.401 hours 0.00239 weeks 5.498225e-4 months , the reactor achieved criticality, ending the scheduled refueling outage. The generator was phased to the grid at 2143 hours0.0248 days 0.595 hours 0.00354 weeks 8.154115e-4 months on 11-3.

11-19 At 2201 hours0.0255 days 0.611 hours 0.00364 weeks 8.374805e-4 months the reactor automatically scra=med due to con-tractor personnel inadvertantly striking a protection system instrument panel.

11-20 The reactor was critical beginning at 0602 hours0.00697 days 0.167 hours 9.953704e-4 weeks 2.29061e-4 months , and the generator was phased to the grid at 1102 hours0.0128 days 0.306 hours 0.00182 weeks 4.19311e-4 months .

11-30 At the conclusion of this report period, the plant was operating at 99% of rated thermal power.

1608 194

ML19256F275

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