ML19241B437

Monthly Operating Rept for June 1979

ML19241B437
Person / Time
Site:	Vermont Yankee
Issue date:	07/12/1979
From:	Sjogren R VERMONT YANKEE NUCLEAR POWER CORP.
To:
Shared Package
ML19241B435	List: ML19241B434 ML19241B437
References
MOR-790630, NUDOCS 7907170152
Download: ML19241B437 (7)

Text

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VERMONT YANKEE NUCLEAR POWER STATION M'!'THLY s STATISTICAL REPORT 79-06 FUR THE MONTH CF JUNE, ~979 7907170 /.'s

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s OPERATING DATA REPORT DOCKET NO. 50-271 DATE N 7

CONIPLETED BY * " 94caren TELEPHONE /^171 '66-9011 X2281 OPERATING ST ATUS Ver ent Yankee Notes

1. Unic Name:

2. Reporting Period: J me 1979

3. Licensed Thenaal Power I5IWt): 1593

4. Nameplate Rating (Gross 51we): 540

5. Design Electrical Rating (Net 31We):

514 (open cycle) 504 ( closed cycle)

6. 312ximum Dependable Capacity (Gross SIWE): 535

7. Sf aximum Dependable Capacity (Net SIWE): 504 S. If Changes Occur in Capacity Ratings (items Number 3 Throu;h 7) Since Last Report.Gise Reasons:

9. Power Lesel To Which Restricted. If Any (Net 5!We):

10. Reasons For Restrictions. If Any:

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This 51onth Yr..t o.Da t e Cumulative 720 4,343 59,378.75

11. Hours in Reporting Period

12. Number Of Hours Reactor Was Critical 720 3,935.3 47,825.1

13. Reactor Resene Shutdown Hours 0 0 0

14. Hours Generator On Line 720 3,921.8 46.054.8

15. Unit Reserve Shutdown Hours 0 0 0

16. Gross Thermal Energy Generated (51WH) 1.075 471 6.034.372.7 64.421,150.2 -

17 Gross Electrical Energy Generated 151WH) 352.110 ,_,

2,039,422 21,378,890 IS. Net E:ectrical Energy Generated (31WH) l'O.nno 1.o44.524 20.7.,64,047

19. Unit Senice Factor 100 00.3 77.6

20. Unit Availability Factor 1n0 90.3 77.6

21. Unit Capacity Factor (Using 5fDC Net) 00.0 89.8 67.7

22. Unit Capacity Factor (Using DER Net) 90.4 88.3 67.7

23. Unit Forced Outage Rate 0 0 6.7

24. Shutdowns Scheduled Oser Next 6 Slonths (Type. Date.and Duration of Eachi:

Refueline Sootenber 22 - 6 week's

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

26. Umts in Test Status IPrior to Commercial Operation): Foreca3r Achiesed INITIA L CRITICA LITY INITIAL ELECTRICITY V

C05131ERCIAL CPERATION '

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(9/77 )

AVERAGE DAILY UNIT POWER ..EVEL DOCKET NO. 50-271 UNIT Ve r~jPln t Yankee DATE 7007'2 COstPLETED JY R. M. Sioeren TELEPHONE (617) 366-9011 X 2281

.\tONTH l'U" 1979 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL

(.\1he Net) 151We-Net)

501 37 473 2 274 13 489 3 352 19 493 4 412 20 492 3

470 ,,

492 6 488 480 7

485 0 23 3 467 490 3

9 . .' 9 25 492 to 469 26 448 11 483 ;7 481

493 ;3 485 13 405 ,9 488 14 49' 30 486 490 ---

13- 3[

io 435 INSTRUCTIONS On this f armat. 'ut the aserage da:i un:t power tese! in \tWe Net for e::ah d23 :n the repornn2 :m. nth. Compute to the nearest sneie mepwatt.

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x DOCKET NO.

50-271 UNITSilUIDOWNS AND POWER REDUCTIONS _

UNI T N AssE Vernent fankee DATE 790712 .,

RI: PORT M ONTil June 1979 COMPl.El ED ltY R. Pf. Slovren T ELI PilONE (617) 366-9011 X2281

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.2 :- g sM L.icensee 5 g,  ;, Cause & Corrective gl

., 3 No . Date g gg g jg$ Event MY p Attion in H

$E $ .5 ;j, c Report it 8a' u go Psevent itecnrience f

O u

o 79-8 790602 S 0 11 4 --

RAA CONROD  !! - Control Rod Pattern Exchange (Power Redne-tion) 79-9 790608 S 0 11 4 --

RAA CONROD 11 - Cont rol Rod Pattern Adjust ment (Power Reduc-tion) 79-10 790626 F 0 A 4 --

CBR VALVEX A "A" Recirc Discharge Valve (V2-53A (Power was electrenically backser.ted to Reduc- stop valve leakage.

tlon) 1 2 3 4 l'. linied Iteason: M eilniil: 1:xhita G . Instruainns S St heiluted A l'qnipniens Failure (Explain) 1 Mannal for Picparaiion of Data 11 Maintenance oi Test 7. Manual Scrain. I'ntiy Sheets inr L.icensee C Ref orfing 3.Antomatic Su.un. Eveni Itepne s (1.1 lt I l'de INtiltl.G-D Regulatiny Resisiction 4 Other (Explain) 0161) 1 -Opciato: l iaining & l.itense Exainination i . Aihnine.t e ative 3 G ()per.itional I i sor (l .x pl.nai) [x]idsii l - Same Sones e l'8/17) 11 Oihe 11:apl.ein)

1)OCKET f;0. 50-271 UNIT Vermont Yankee 10 DAlli 790712 en N

CO:!PLETED hY R. ft. Sj og re r.

TELEPil0NE (617) 366-9011. X2281 .'~2 v

SAFirlY !!E!All:D f t\lNil:NANCil NA~l uf tli 01' Llilt 011 Ul!!'Al;L i!All UNC l l ON 1:QllII'l!!~.N f f IAI N'l l:NANC E NU!!!!ER CAUSL 1:LSUL1 Cull!!!:C' LIVE ACI luN Fuel pool and reactor Corrective NA Failed power Units tripped Replaced power supplies building vent radiation FIR 79-332 supplies monitors Containment air dilution Corrective NA Failed t ransmit ter No output Replaced transmitter pressure transmitter MR79-452 PT-VG-4A llPCI booster pump outboard Corrective NA Leak,ge Low oil level Added oil bearing MR79-454 IIPCI booster pump seal Corrective NA 1.oose fitting 1.eakage Tight ened f it t ing water MR/9-464 RCIC flow ludicator Corrective NA Partially drained False flow indi- Filled reference leg MR79-467 reference leg cations

DOCKET NO. 50-271 UNIT ve mnt n., t e e DATE 700712 CCMPLETED BY R. M. sineron TELEPHONE (A17T 367 o011 X2281 REPORT MONTH June 1979 SL" MARY OF OPEPMI.' G EXPERIENCES Highlichts Ve rnent Yankee operated at 93.87. of rated thermal power for the month of June, 1979. Gross electrical generation for the month was 332,110 MWHe, or 90.6% of design electrical capacity.

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

6-1 At the beginning of the report period, the plant was operating at 997. of rated thermal power.

6-2 At 0210 hours0.00243 days <br />0.0583 hours <br />3.472222e-4 weeks <br />7.9905e-5 months <br /> power was reduced to 317. to effect a control rod pattern exchange. Power increase to 97%

co =enced at 1113 hours0.0129 days <br />0.309 hours <br />0.00184 weeks <br />4.234965e-4 months <br />.

6-8 At 2100 hours0.0243 days <br />0.583 hours <br />0.00347 weeks <br />7.9905e-4 months <br /> power was reduced to 68% to ef f ect a control rod pattern adjustment. Power increase to 98% commenced at 0230 hours0.00266 days <br />0.0639 hours <br />3.80291e-4 weeks <br />8.7515e-5 months <br /> on 6-9.

6-26 At 0837 hours0.00969 days <br />0.233 hours <br />0.00138 weeks <br />3.184785e-4 months <br /> power was reduced to 67% to fa .e a primary containment entry by plant personnel to .it i f y and correct a source of primary coolant leakage. Power increase to 98% co==enced at 1133 hours0.0131 days <br />0.315 hours <br />0.00187 weeks <br />4.311065e-4 months <br />.

6-30 At the conclusion of this report period, the plant was operating at 98% of rated thermal power.

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