ML19320C988

Monthly Operating Rept for June 1980

ML19320C988
Person / Time
Site:	Vermont Yankee
Issue date:	07/08/1980
From:	Beers F, Burger F VERMONT YANKEE NUCLEAR POWER CORP.
To:
Shared Package
ML19320C987	List: ML19320C986 ML19320C988
References
NUDOCS 8007180400
Download: ML19320C988 (6)

Text

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VERMONT YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 80-06 FOR THE MONTH OF JUNE, 1980 ,

i l- 80 0718070d i . . _ . - -

OPERATING D ATA REPORT DOCKET NO. 50-271 DATE 800708 CO.i!PLETED IJY F.C. Beers TELEPHONE 617-366-9011 X2215 OPERATING ST ATUS

1. Unit Name: Vermont Yankee Notes

2. Reporting Period: June 1980

3. Licensed The:msl Power (StWri: 1593

4. Namepiste Ratin; tGross 3thet: 540 .

5. Design Electrient Rating (Net 3twel: 514 ( P8") 504 (closed)

6. >!nimum Cependable Capseity iGross StWel:

7. Sluimum Dependsbie Capacity (Net 31Wel: 504 S. If Changes Occur in Capscity Ratin;s t. items Number 3 Through 71 Since Last Report. Give Reasons:

- 9. Power Level To which Restricted. If Any (Net StWe):

,10. Reasons For Restrictions. !f Any:

C This Stonth Yr to-Date Cumulatise

-11. Hours in Reporting Pe-iod 4.367.00 --

', 12. Number Of Kours Reactor Was Critics! 672.28 4,173.71 55.332.10

13. Reactor Reserve Shutdown Hunts 0.0 0.0 0.0

14. Hours Generator On-Line 660.00 4,118.60 53,446.38

15. Unit Re>ene Shutdown Hour, 0.0 0.0 0.0

16. Cross Thermsi Energy Gener:ted (.\lWH) 969,742.00 6,309,169.00 75,533,802.00

7. Gross Electrics 1 Energy Gexented talhHi 318,668.00. 2,141,802.00 25.111,472.00

- 18. Net Electrical Energy Genersted (51WH) 298,640.00 '"2,043,101.00 23,811,466.00

19. Unit Service Factor 91.67 94.31 78.41

20. Unit Availability Factor ^- i 94.31 78.41

21. Unit Capscitv Factor tU>in; 31DC Neti 82.30 92.83 69.31

22. Unit Capseity Factor (Using DCR Neti 80.70 91.02 67.96 6.JJ 2.07 6.19

23. Unit Forced Outs;c Rate l 24. Shutdown > Scheduled Ou:r Next 6.'.lunths iType. Date.and Duration of Eschi:

j 1. CRD Testing as required by the NRC scheduled for Mid July. Duration unknown

2. Annual refueline scheduled for eight weeks beeinnine Sentamher 26. 1980

-23. If Shur Down At End Of Report Period. Estimsted Dste of Startup.

26. Units in Test Status t Pr or to Commercial Operationi: Forecast uhiesed l .

l INITIA L CRITICALITY l , INITI A L ELECTRICI rY

! CO3talERCI.\L Ol'ER.\ TION goi- i

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DOCKET NO. 50-171 UNIT Vermont Yankee DATE 800708 COMPLETED BY F.J. Burger TELEPHONE 802-257,7711 X137 REPORT MONTH June, 1980

SUMMARY

OF OPERATING EXPERIENCES Highlights Vermont Yankee operated at 84.35% of rated thermal power for the month.

Gross electrical generation was 318,668 MWH

• or 81.95% design electrical capacity.

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

6/1/80 At the beginning of the reporting period the plant was at 99.1%

of rated thermal power.

6/11/80 At 1200 hrs. a power reduction was initiated to investigate leakage into the costeinment. This was followed by a shutdown l to repair a leak in a feedwater check valve. The turbine i was tripped at 1710 hours0.0198 days <br />0.475 hours <br />0.00283 weeks <br />6.50655e-4 months <br />.

6/13/80 At 1110 hrs. a start-up was initiated. The turbine was phased l

onto the grid at 2043 hrs.

6/15/80 At 0927 hrs. "B" Recirculation Pump tripped causing a power reduction. The pump was restarted and a power ascension initiated.

6/17/80 At 1401 hrs. the reactor scrammed due to a turbine trip caused by a high water level in a moisture seperator drain tank. The problem was resolved (see attached Shutdown & Power Reductions Sheet) and a plant startup initiated. The turbine was phased onto the grid at 2231 hrs.

6/30/80 At the end of the reporting period the plant was a 99.5% of rated thermal power.

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AVERAGE DAILY L' NIT POh ER LEVEL

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DOCKETSO.

IJNIT Vermont Yankee 00708 DAT c i

F.J. Biarger COMPLETED BY TELEPHONE 802-257-7711 X137 MONTH June 1980 DAY AVERAGE I VER LEVEL day AVERAGE DAILY POWER LEVEL i (MWe Net l l l

1 491 251 1 l.o l

, 492 323 i

~ ~ 18 37 489 i9 377 l 4 491 ,0 457 495 493 5 i 6 492 ,,

492

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7 493 489 23 "

493 484 S 24 9 497 480 l 33 '

498 IO 26 468 11 289 27 457  !

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494 12 13 24 ,9 492 .

311 14 30 490 303

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' 31 l 16 339 l

INSTRUCTIONS .,

On this fortnst. list the act::ge daily unit power lese! in Mwe. Net n r aach day in the reporting n;. nth. C unpuie to the nesrest wiiole ene;: watt.

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8 50-271 I KE UNIT SilOTDOWNS AND POWER REDUCTIONS gg l Vermont Yankee -

3 DAU- JQDZD3 COMI'l.i.llill llY F. J. Burge__r RI:POllT MONill June i g,g,tg.gio,Ng; 1-802-257-7711 X 137

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80-14 80-06-11 F 51.5 A 1 N/A Cll VALVEX Leakage from feedwater check valve caused by failed valve seal. Replaced seal.

80-15 80-06-15 F 0 A 4 N/A CD RELAYX Recirculation pump tripped while (power resetting pump HG set relays. Restarted reduc- pump, tion) 80-16 80-06-17 F 8.5 A 3 N/A IIA VAI. VEX liigh level in main turbine moisture

. separator drain tank tripped the turbine and scrammed the reactor, liigh level caused by faulty drain valve. The valve was repaired.

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DOCKET NO. 50-271 l UNIT Vermont Yankee ,

DATE 800708 COMPLETED BY F.J. Burger TELEPHONE 802-257-7711 X137 MONTilLY EQUIPMENT MAINTENANCE June 1980 Page 1 of 1 NATURE OF LER OR OUTAGF EQUIPMENT MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION Main Steam Valve Corrective MR80-397 N/A Worn Packing Leakage Replaced bonnet gasket and MS 938, EPR Sensing packing.

Lina Isolation RWCU Valve V-12-19A Corrective MR80-409 N/A Worn Parts Leatrage Replaced seal ring & packingL RilR Valve V10-46A Corrective HR80-488 N/A Worn Parts Leakage Replaced gasket & packing Feed Water Check Valve V2-28B Corrective MR80-613 Outage 80-14 Worn Parts Leakage Replaced seal ring Drywell Air Lock Corrective MR80-619 N/A Component Inner Door Gasket Deterioration Degraded Casket Replaced gasket RPS Relay SA-K12A Corrective HR80-493 N/A Component Deterioration Burned Relay Replaced relay coil l

Steam Tunnel Temp. Corrective MR80-584 N/A Component Switch TS-2-121D Halfunction Set Point Drift Repicced switch Containment Sampling Corre,ctive HR80-634 LER 80-20/3L Dirt Valve Sticking ' Disassembled and cleaned

~; System Isolation Valve valve.

109-76A 4

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