ML19207A278

Monthly Operating Rept for Jul 1979

ML19207A278
Person / Time
Site:	Vermont Yankee
Issue date:	08/10/1979
From:	Sjogren R VERMONT YANKEE NUCLEAR POWER CORP.
To:
Shared Package
ML19207A276	List: ML19207A275 ML19207A278
References
NUDOCS 7908140437
Download: ML19207A278 (6)

Text

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VERMONT YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 79-07 FOR THE MONTH OF JULY, 1979 7 90814 et ^sa o~=

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OPERATING DATA REPORT DOCKET NO. 50-271 DATE 790810 COh!PLETED BY DX Siocren TELEPHONE (617) 366-9011 X"/81 OPERATING STATUS Ve ront Yankee Notes

l. Unit Name:

2. Reposting Period: Julv 1979 1,593

3. Licensed Thermal Power (31Wt):

4. Nameplate Rating (Gross 31We?. 540 514 ( Pe cycle) 504 (closed cycle)

5. Design Electrical Rating (Nec 31We):

6. Sfaximum Dependable Capacity (Gross SIWE): 535

7. Slaximum Dependable tapacity (Net SIWE): 504 S. If Changes Occer n Capacity Ratings (Items Number 3 Through 7) Sinc :.ast Report, Give Reasons.

9. Power Level To Which Restricted !f Any (Net SIWE):

10. Reasons for Restrictions. lf Any:

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This alonth Yr..to.Date Cumulative

11. Hours in Reporting Period 744 5,087

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12. Number Of Hours Reactor Was Critical 744 4,679.3 48,569.1

13. Reactor Reserve Shutdown Hours 0 0 0

14. Hours Generator On.Line 744 4.665.8 . 46.798.8

15. Unit Reserve Shutdown Hours 0 0 0

16. Gmss Thermal Energy Generated (SIWH) 1.1 ? S .100.L 7.162.433.2 _65,549,250.7 .

17 Gross Electrical Energy Generated (5tWH; 364./i 3 2,403,865 21,743,333

18. Net Electrical Energy Generated (5tWH) 'L' '6' 2.285.7R6 20.605,309

19. Unit Senice Factor 100 91.7 77.8

20. Unit Ava~iability Factor 100 91.7 77.8

21. Unit Capacity Factor (Using .\ LLC Net) 91 89.2 68.0

22. Unit Capacity Factor (Using DER Net) 89.2 87.4 66.7

23. Unit Forced Outage Rate 0.0 0.0 6.6

24. Shutdowns Scheduled Over Next 6 Stonths (Type. Date,and Duration of Each):

Refueline September 22, 1979 6 weeks

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

26. Units in Test Status (Prior to Commercial Operation): Forecast Achieved INITIA L CRITICA LITY INITIA L ELEC TRICITY CO\l.\tERCIAL CPERATION (9/77)

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AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-271 UNIT Vermont DATE 700R10 COVPLETED BY R.M. Sjogren TELEPHONE (617) 366-4011 X2281 SiONTH July 1979 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (31We-Net) (31we-Net) 1 463 37 465 2 475 13 466 3 476 g9 465 4 480 20 458 5 481 ;g 361 6 473 ,, 42 9 7 406 23 474 S 4 6 ') 24 467 9 467 25 463 10 472 26 464 11 467 27 466 12 427 ,3 465 13 470 ,9 451 14 AA9 30 465 _

15 465 3; 449 16 464 INSTRUCTIONS On this for:nat. list the average ca:!y unit power level in MWe-Net for e: h day in tl.e reportinz month. Compute to the nearest whole megawatt.

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DO( KET NO 50-271 UNITSil01 DOWNS AND POWER REDUCTIONS CO UNIT N Ah!E Vermont DATE 790810 {.]

U COhlPLEll:D i;Y _R.M. Sjocren ItEPORT hl0N111 Juiv 1979 TELI PflONE (617) 366-9011 X2281 v,

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., .2 e g , .s X Lkensee c 8,, c t , Cause & corecctive No . Date g. gg  ;; _g g 5 Event =y $1 Atijon in

• 5 NU c$ E j di Itcport # yU P4cvent Itecorrence o

79-11 79070, S 0 11 4 --

RA CONROD 11 - Control Rod Pattern Adjustment (Power Reducti an) 79-12 790711 F 0 11 4 - -

CB PUMPXX 11 ' A' Recirc Pump Speed Oscillation.

(Power Tachometer was replaced.

Reducti on) 79-13 790720 S 0 11 4 --

RA CONROD 11 - Control Rod Pattern Adjustment (Power Reducti on) 79-14 790731 F 0 A 4 --

WA VALVEXX A - Packing leak on the 'A' Recirc 11G (Power set lube oil cooler service water Reduct on) outlet valve. Valve was repacked and backseated.

I 2 3 4 17: l'ois ed Iteason: Elethoil: 1:xinbit G - Instinctions S. Stlicilnied A l'quipment Failure (lixplain) l-h! annat for Picp.iration of Dat

!! hiaintenai<ce oi Test 7-htanual Scrain. Enity Sncets Ior iacensee C-Itcluctinr. 3 Antomatic Scram. Event Itepint (l.I:lti lite INtfill.G-D Rc;;ntatory itesisittion 4-Ollier (lixrlain) 0161)

I Opciator Isaining & License lixamination F Ailmini.teative 5 G Opciational i esor (1.xpl.on) I'ninliit I Same Sousse Pr/17) 11 Ollici (limplain)

DOCKliT NO. 50-271 C' rJ UNIT Vermont DATE 790810 c -

y, COIIPLETED liY R. M. Sjogren C TELEPllONE (617) 366-9011 X2281 SAFliTY l'ELAllID flAINTENANCli NAlVitti UI' Llill Ull UUI AGli MA!,1-UNC~1 I ON

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EQUII'lltiflT  ?!AINTENANCli NUIIBER CAUSL 1:LSUL1 COI RECTIVli AClION Reactor Building Vent Duct Corrective NA Unknown Initial false mid Rechecked calibration Ibnitor (17-452B) MR 79-373 range values

DOCKET NO. 50-271 UNIT Ve rmont DATE 790810 COMPLETED BY R. M. Sjogren TELEPHONE (617) 366-9011 X2281 REPORT MONTH July 1979 SU't!ARY OF OPERATING EXPERIENCES Highlights Ver=ont Yankee operated at 95.2% of rated ther=al power for the month of July, 1979. Gross electrical generation for the month was 364,443 K4He, or 90.7% of design electrical capacity.

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

7-1 At the beginning of the report period. the plant was operating at S3% of rated thermal power.

7-7 At 2200 houts power was reduced to 78% to effect a con-trol rod pattern adjustment. Power increase to 98%

co _enced at 2330 hours0.027 days <br />0.647 hours <br />0.00385 weeks <br />8.86565e-4 months <br />.

7-11 At 2200 hours0.0255 days <br />0.611 hours <br />0.00364 weeks <br />8.371e-4 months <br /> power was reduced to 45% to perform main-tenance on the 'A' Recirc pump to correct pump speed oscillations. Power increase to 98% commenced at 0205 hours0.00237 days <br />0.0569 hours <br />3.38955e-4 weeks <br />7.80025e-5 months <br /> on 7-12.

7-20 At 2230 hours0.0258 days <br />0.619 hours <br />0.00369 weeks <br />8.48515e-4 months <br /> power was reduced to 67% to effect a con-trol rod pattern adjustment. Power increase to 99%

commenced at 0430 on 7-21.

7-31 At the conclusion of this report period, the plant had reduced power at 2200 hours0.0255 days <br />0.611 hours <br />0.00364 weeks <br />8.371e-4 months <br /> to 50% to correct a valve packing leak on the 'A' Recirc MG set Lube Oil Cooler.

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