Text

Monthly Operating Rept for June 1979
	ML19225A178
Person / Time
Site:	La Crosse File:Dairyland Power Cooperative icon.png
Issue date:	07/04/1979
From:	Parkyn J; DAIRYLAND POWER COOPERATIVE
To:	;
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ML19225A177	List: ML19225A176; ML19225A178;
References
	MOR-790630, NUDOCS 7907180520
	Download: ML19225A178 (9)
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OPERATTNG DATA REPORT 50-409 DOCKET NO DATE 0/-04-79 COMPLETED BY d-FAKNIN 6u0-b89-2331 TELEPilONE OPERATING STATUS uA CROSSE BOILING WATER REACTOR Notes

1. Uni Name:

0000 79-01-06 to 2400 79-30-06

2. Reportha Period.

165

3. Licensed Therraal Pcwcr (MWt):

65.3

4. Namephte RathM (Grcs: MWe):

50

5. Dest;n Dectr!:s! Ratt:2 (Net MWe):

50 6.1.lmrmm Depez:dable Capadty (Cross MWe):

4

7. Maxt:st=s Dependable Capacity (Net MWe)

8. If Changes Occur in Capacity R.uings (Items Nu:nber 3 Through 7) Since 12st Report. Gise Rea.ons:

9. Fcwer Levd To WLkh Restricted. If Any (Nei Mbe)

___48 Ne t f S'e SELF-IMPOSED RESTRICTION DUE TO NUCLEAR

10. Ret: ens For Res::ictions. lf Any:

INSTRUME'iTATION NOISE AT HIGHER F0WER LEVELS (VOIDS IN STEAM SEPARATORS).

This Month Yr. to Date Cumulatne 720 4343 81,819 II. Ibm la Repc:tmg Period

12. Number Of !!ours Reactor has Critical 701.7 2576 53,755.2

13. Ecmeter Rm Shr.:down !!am 0

0 478 671.3 2376.0 49,094.1

14. ne::: r--Os4!::e

15. Unit Raaerve *2=edows ihm 0

0 79

16. Gree Theru=1 Ece gy Ge=crz:cd (MWil) 84,293 J?l,420 6,760,662

17. Gro:a Electrics! En:rgy Ge= crated (Mwil) 24,192 62,672 2,044,981

18. Net Destrn! Energy Ge=crz:ed (Mwil) 22,552 56,635 1,888,438 93.2 54.7 58.0

19. Unit Smics Facto 93.2 54.7 58.1

20. Unit Ara?.sb51ty Fa: tor 65.3 27.2 46.5

21. Unit Capdty Factor (Uz!=g MDC Net) 62.6 26.1 44.6

22. Unit capacity Factor (Usbg DER Net)

23. Unla Forced Outage Rate 6.8 14.1 6.0 24.' Shutdeens $clee:fded Over Next 6 Months (Type. Date, and Durstbn of Each t-NONE SCHEDULED

25. tf Shut Down At End Of Rep:rt Prried. Esttected Date of Strtep:

26. Units ia few Starvi (Prior to Cw.M Operatios t Forecas Achsed INITIA.L CRTTICALITY INITIAL ELECTRICITY COMMERCIA L OPER ATION 347 275 793,m g

AVER AGE D AILY UNir POWER LEVEL DOCKET NO.

50-409 LACBWR Wir 07-04-79 DATE d 0 PAREYN COMPLETED BY 608-689-2331 TELEPFf 0N E woNng _JU'iE 1979 DAY AVER 4GE 1) All ' POhER LFVEL DAY AVER AGE DAILY POhER LEVEL

( MWe-Net i 1?

g 17 42 2

0 7g

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-2 17 19 4

I 32

o 20 5

l 22 42 6

22 l'

43 t

s 27 43 24 9

30 43 25 10 M

43 26 1

33 27 42 35 3,

28 42 37 13 29 42 38 g4 30 42 38 15 31 16 40 INSTRUCTIONS On this forrr.at hrt the average daily unit power levelin Mwe Net for eact day in the reporting rnonth. Co npure tu the nearest whole nwgawatI.

(9/77)

LI

DOCKET NO.

50-409 UNIT SilU1 DOWNS AND POhER REDUCTIONS UNIT N AME LACBWR DATE 07-04-79 JUNE 1979 (OMPLETED BY J. P AR KYN RLPORI %IONTil TELEMIONE Fnp_f9o_p331 "t

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33.79 A

3 NA CD ELECON An Unplanned Closure of the Main Steam Isolation Valve (MSIV) Occurred The Cause of the Closure was Traced to Loose Wires on Relay SK 18/l which is Part of the Valve Control Circuitry.

79-07 79-06-18 F

14.95 G

3 NA CD NA Personnel Action While Performing Maintenance on a Multipoint Recorder Caused a Fuse Supplying the IL1 Bus to Open.

This Bus Supplies Power to the Pressure Transmitter ihich Closes the MSIV in the Event of Low Steam Pressure to the Turbine.

Loss L^>

of Power to this Transmitter thus Closed the MSIV, which Caused a Reactor Scram.

ra 1

2 1

4 s

I l in ceJ Reason M e t h os!

I shbit G Inst rutit >ns s',

s SsheJuled A Equipment f ailure (I splain)

! Mainul f or Piepaurion of Dat a B.Maintenanse or Test

' M n ou' % r a.o I.i.ii> shecis t o, Laenue C-Pefueling

\\ution ein N r no I.cni Repon 111 R) f Ye(Nt RI G D Regulatory Resirktion 4 Oth ri!sp' uni oint6 i Opeutor Trauung A I tenw I s,unnution f Adminniutne G-Operational I tr r ti splain)

I sinNt i h oc N. w e 08)

11 Ot he r (l'splam)

NARRATIVE

SUMMARY

OF OPERATING EXPERIENCE JUNE 1979 At the outset of the June reporting period, the reactor was in its initial power escalation following the ccmpletion of refueling.

A reactor scram occurred at 2220 hours0.0257 days 0.617 hours 0.00367 weeks 8.4471e-4 months on June 1,

1979, due to closure of the Main Steam Isolation Valve (MSIV).

This closure was attributed to two loose wires on Relay SK18/l which is part of the valve control circuitry.

A reactor startup was conducted on June 2nd with the reactor critical at 1243 hours0.0144 days 0.345 hours 0.00206 weeks 4.729615e-4 months .

The turbine generator was synchronized to the DPC grid at 0807 hours0.00934 days 0.224 hours 0.00133 weeks 3.070635e-4 months on the 3rd.

Initial power escalation to above 901 reactor power was completed by June 17th.

A reactor scran occurred on June 18th at 1110 hours0.0128 days 0.308 hours 0.00184 weeks 4.22355e-4 months due to per-sonnel action while performing maintenance on a multipoint recorder.

A momentary short en an alarm circuit caused a fuse supplying the IL1 bus to open.

This bus also supplies power to various other recorde rs and process instrumentation.

The low steam pressure signal from the Reactor Pressure to Steam Turbine transmitter and its associated relay caused the MSIV to close due to loss of pcwer from the IL1 bus.

A reactor startup was conducted on the same day with the reactor critical at 1501 hours0.0174 days 0.417 hours 0.00248 weeks 5.711305e-4 months .

The turbine generator was synchronized to the DPC grid at 0207 hours0.0024 days 0.0575 hours 3.422619e-4 weeks 7.87635e-5 months en the 19th.

The maximum power level at which the reactor was operated during June 1979 was 93.2% of rated ther.al power and the maximum net electrical power generated was 44 MWe-net.

Significant maintenance items performed during the reporting period are indicated on attached Instrument & Electrical Maintenance and Mechanical Maintenance listings.

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'r JUNE 1979 MECHANICAI, MAII;TENANCE LER OR NATURE OF OUTAGE SA_LFUNCTION EQUIPMENT MAINTENANCE NUMBER CAUSE RESULT COR9ECTIVE ACT10'i N, Manifold Corrective NA Leak On Valve Body Loss of N2 to Ground Out Old Weld and A tmosphere Silver Solder to Seal Servo Valve for Turbine Corrective NA Contamination in Malfunction of Cleaned t.d Polished Governor Turbine Oil Turbine Governor Servo Valves Lower Control Rod Dcive Preventive NA NA NA Performed PM Inspaction and Frame No. 20 Stored for Spare.

Replaced Seai in Hydraulic Motor.

Stack Air Monitor Pump Corrective NA Wear from length Pump Badly Rebuilt Pump and Stored of service Damaged for Spare i

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ML19225A178

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