ML20064G360

Monthly Oper Rept for Nov 1978

ML20064G360
Person / Time
Site:	Beaver Valley
Issue date:	12/01/1978
From:	Witkowsky F DUQUESNE LIGHT CO.
To:
Shared Package
ML20064G358	List: ML20064G354 ML20064G360
References
NUDOCS 7812110132
Download: ML20064G360 (4)

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OPERATING DATA REPORT DOCKET NO. 50-334 DATE 1?/1/79 COMPLETED BY F. P. tiitkcus TELEPHONE. 41 #.47- 5023-OPERATING STATUS S

1. Unit Nasne: 3eaver Valley Power Station. Unit #1 Notes

2. Reporting Period: November. 1078

3. Licensed Thennal Power (MWt): A o

4. Nameplate Rating (Gros: MWe): 923 S. Design Electrical Rating (Net MWe): 852

6. Maximum Dependable Capacity (Gross MWe): 845 7

7. Maximum Dependable Capacity (Net MWe): 800

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

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9. Power Level To Which Restricted. If Any (Net MWe): None

10. Reasons For Restrictions. If Any:. N/A

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l This Month Yr to.Date Cumulative II. Hours I.s Reporting Period 720 8,016 22,656

12. Number of Hours Reactor Was Criti.:al 0 3.430.94 9.878.84

13. Reactor Reserve Shutdown Hours 720 3.097.63 4.056.03

14. Hours Generator On.Line 0 3.315.13 9,346.43 IS. Unit Reserve Shutdown Hours 0 0 0 i r 16. Cross Thermal Energy Generated (MWH) 0 8,294.360.80 20.363.854.60

17. Gross Electrical Energy Generated (MWH) 0 2.506.800.00 0.181.040.00

18. Net Electrical Energy Generated (MWH) 0 2.141.4?7.00 5 A51.?oo no

19. Unit Service Factor 0 41.3 47.9 I 20. Unit Availability Factor 0 41.3 47.9 t

21. Unit Capacity Factor (Using MDC Net) 0 36.5 42.1

22. Unit Capacity Factor (Using DER Net) 0 34.2 39.5

23. Unit Forced Outage Rate 100 49.5 17.5

24. Shutdowns Scheduled Over Next 6 Months iType. Date and Duration of Eacht:

Plant currentiv in extended shutdown to replace the main eenerator's main j transformert refueling delayed.

25. If Shut Down At End Of Report Perind. Estimated Date of Startup: 12/13/78

26. Units In Test Status IPrior to Commercial Operationi: Forecast Achieved INITIAL CRITICALITY N/A N/A i INITIA L ELECTRICITY N/A N/A COMMERCIAL OPERATION N/A N/A 7812IIO131 -

,s AVERAGE DAILi UNIT POWER LEVEL l

DOCKET NO. 50+334 UNIT BVPS tinit #1 DATE 12/1/78 COMPLETED BY F. P. Witkow TELEPHONE 412-6t.3-5023

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MON 1H November. 1978 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe. Net) (MWe-Net)

! O 37 0' 4 0 g3 0 2

3 0 39 0 4 0' 20 0 5 0 21 0 6 0 n 0 7 0 D 0 8 0 24 0 ll 9 0 u O 10 .0 26 0 II O 27 0 12 0 23 0-13 0 0 29 0 0 14 30 0 ---

15 , 33 16 0 INSTRUCTIONS On this formai.h.st the mrage daily unit power feel in MWe. Net for each day in the reporting sinon:h.Cmnpuie to the nearest whole megawaii.

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DOCKETNO. 50-334 UNIT SHUTDOWNS AND POWER REDUCTIONS UNIT NAME BVPS Unit #1 DATE 12/1/78 COMPLETED BY __F. P. W1tkowsky REPORT MONTil Nove:r.ber. _ l??8 412-643- 5023 TELEPilONE l

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,{g 3 ~ Y ~g Licensee g r, p't Cause & Correcieve

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-$ 3g 4 2 s oc Event gj EE Assi.m to

• .E : y Report = aO E' Prevent Returrence 3 ;)j =!!

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l 23 780728 F 720 A 3 LER 78-43 EB TRANSF A generator differential / main transformer differential trip initiated a reactor and turbine trip when a fault in the A phase of the main generator main transformer resulted in failure of the transformer.

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.i 1 2 3 4 F: F.orced Reason: Methml: Exhibit G Inssenctions S: Schedu!cd A.Eiguipment Failure (Explain) l-Manual fn Pseparation of Data B Maintenance ci Test 2 Manual Scram. Entr> Sheels sin I.icensee C Refueling 3 Automatic Scram. Event Rep we (LI:RI FitcINtlREG D Rerulatus) Restriction 4 Other IExplaini 0161)

I Operato Training & License Examinathm 12 Adnunisseative .'

G Opeeational 1:sso II.nplaint Eshibit I Sam /Souice l'7/77) Il Dihes (inplam p

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DUQUESNE LIGHT COMPANY Beaver Valley Power Station Narrative Summary Of Operating Experience - November, 1978 Date Event November 1-30 The plant remained in Mode 5 throughout the month of November during which time the main transformer replacement and turbine-generator overhaul work continued.

November 3 The Type C leak testing was completed. At 0635 hours0.00735 days <br />0.176 hours <br />0.00105 weeks <br />2.416175e-4 months <br />, the Containment Type A Pressurization Test was started but it was stopped at 0807 hcurs because of air leakage on the 7 containment personnel air locWPinner door. At 0305 hours0.00353 days <br />0.0847 hours <br />5.042989e-4 weeks <br />1.160525e-4 months <br />, the 1C Containment Air Recire fan tripped while operating in slow speed due to a short in the motor. At 2000 hours0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br />, the Containment Type A test was restarted.

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November 4-19 On November 9, the No. 2 Diesel Generator was returned to operable status after extensive testing and maintenance. Main turbine oil flush was in progress on November 11. Also, on November 11 at 2230 hours0.0258 days <br />0.619 hours <br />0.00369 weeks <br />8.48515e-4 months <br />, the Type A Leak Test was discontinued because of erratic containment temperature readings and leakage through containment air ejector isolation valves. Containment depressurization was started on November 12 to permit correction of these problems.

November 20-30 The Containment Type A Leak Test was started at 0000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> on November 20 and completed. Also on November 20, the replacement main transformer was initially energized by backfeeding from the system and used to supply partial station service load for protection checkouts and a soaking period.

Major Safety Related Maintenance - November,1978

1. A leaking seal on the 1B High Head Charging Pump was replaced on November 14.

2. An extensive test of the No. 2 Diesel Generator was completed on November 9.

This test was conducted to determine the probable cause of field flash failure during the incident in July when the Main Transformer was lost. The probable cause was traced to an extremely infrequent hangup of the field flash cutout relay. A circuit to monitor the status of the field flash cutout relay and remote manual field flash capability were added to increase reliability. See Licensee Event Report 78-43.

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