ML20064H017

Monthly Oper Rept for Nov 1978

ML20064H017
Person / Time
Site:	Vermont Yankee
Issue date:	12/11/1978
From:	Sjogren R VERMONT YANKEE NUCLEAR POWER CORP.
To:
Shared Package
ML20064H015	List: ML20064H014 ML20064H017
References
NUDOCS 7812150292
Download: ML20064H017 (6)

Text

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'4 VERSONT YANKEE NUCLEAR POWER STATION SONTHLY STATISTICAL REPORT 78-11 FOR THE FONTH OF NOVE}!BER, 1978 t

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AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-271 UNIT Vermont Yankee DATE 781211' COMPLETED BY R.M. Siocren TELEPHONE (617) 366-9011 X2281 MONTH N V'UD'#* 1970-DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (Mwe Net) -

-- -IMWe-Net)

I 119 37 524

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2 362 33 524 3 440 39 M2 501 4 20 5

407 ,,

524 6 483 ,, 524

, 7 4 43 524 g 522 24 524 9 522 ,

3 524 10 522 26 515 11 523 ,; 524

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I: 510 ;3 523 13 523 ,9 523 14 523 30 524 15 523 3g 16 524 INSTRUCTIONS On this format, list the average daily unit power levelin MWe. Net for each day in ke reporting month. Compute to the nearest whole megswatt.

(9/77 )

s DOCKET NO. 50-271 UNIT Vermont Yankee DATE 781?ll C0!-IPLETED liY R. kl . Siocren .

TELEPllONE (617) 366-9011 X2281 .

SAFI'TY RELATED flAIVIENANCE November 1978 NATURE OF LER OR OUTAGE FIALFUNCTION FIAINTENANCE NU!!BER CAUSE ItLSULT CORRECTIVE ACTION l EQUIP!!ENT Containment Air Valve Corrective Outage Failed Solenoid Velve Sticks Open Replace Solenoid V72-388 FlR 78-1022 78-06 Valve RilR Valve V10-2711 Corrective NA Loose Packing Leakage Adjusted Packing F1R 78-1144 FISIV 80-A Corrective NA Failed Test Pilot Slow Closure Test Replaced Test Pilot Valve FtR 78-1150 Valve Circuit Operation Impaired itPCI Turbine Corrective NA Flanual Trip Sole- Turbine Cannot be Replaced Solenoid FtR 78-1154 noid Valve Failed Flanually Tripped from the Cont rol Room itCIC Turbine Corrective NA Turbine Trip Flech- Turbine Cannot be Disassembled and Cleaned ttR 78-1155 anism not Function- blanually tripped Flechan ism ing due to Dirty from the Cont rol Internals Room

" it" ItllR Service Water Corrective NA Dirty Internals Back Flow Through Disassembled and Cleaned Pump Check Valve V70-40ll S!R 78-1209 the Valve Valve Steam Line Drain Valve Corrective V2-77 F1R 78-1216 NA Loose Packing Leakage Adjusted Packing

DOCKET NO. 50-271 UNIT Vermont Yankee DATE 781211 COMPLETED BY R. M. Sjogren TELEPHONE (617) 366-9011 AZJ61 REPORT MONTH November, 1978 2_______

SU21ARY OF CPERATING EXPERIENCES Highlights Vermont Yankee was in operation every day of the month for November.

The plant operated at an average of 94.7's of rated ther=al power for the report period. Gross electrical generation for the month was 370,910 MWHe or 95.4% at design electrical capacity.

Operation 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 the report period, the plant was increasing power after a shutdown due to turbine bearing

(, problems. At 0700 hours0.0081 days <br />0.194 hours <br />0.00116 weeks <br />2.6635e-4 months <br />, while at 10'. of thermal power, a reactor scram occurred due to the fact that there was a low vacuum in the condenser. A return to full power was initiated at 0900 hours0.0104 days <br />0.25 hours <br />0.00149 weeks <br />3.4245e-4 months <br />.

11-5 At 0600 hours0.00694 days <br />0.167 hours <br />9.920635e-4 weeks <br />2.283e-4 months <br /> power was decreased to 50% for turbine surveillance. A return to full power was initiated at 0700 hours0.0081 days <br />0.194 hours <br />0.00116 weeks <br />2.6635e-4 months <br />.

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

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