ML19210C685

LER 79-048/03L-0:on 791011,station Battery Set B Was Removed from Svc for Repair of Faulty Cell.Unit Operated in Degraded Mode for 24-h.Caused by Discovery of Cell W/Low Specific Gravity.Cell Repaired by Manufacturer

ML19210C685
Person / Time
Site:	Fort Saint Vrain
Issue date:	11/09/1979
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19210C681	List: ML19210C680 ML19210C685
References
LER-79-048-03L, LER-79-48-3L, NUDOCS 7911190426
Download: ML19210C685 (1)

Text

NRC FORM 366 v. a. nvuusan nauw6a wn s wv . .w..

(7 77)

LICENSEE EVENT REPORT (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI CONTROL BLOCK: l 1

l l l l l lh 6

7 0 i 8 9 icl01rlSlvl1l@l010 LICENSEE CODE 14 15

- l 0 LICENSE l0 l01010 NUM8ER l- 10 l0 l@l4 l1LICENSE 25 26 l1 l2 TYPE l 0 J0l@l57 CAT l 58 l@

CON'T REPORT o i I #

3 9e l60L @l610 l 5 l DOCKET 0 l 0NUMBER l 0 l 2 l 6 68l 7 69@l1 EVENT l0 l1DATE l1 l 7 l9 74 ]@]1 75 l1 REPORTl0 DATE l917 l980l@

EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h O 2 lAt 0900 hours0.0104 days <br />0.25 hours <br />0.00149 weeks <br />3.4245e-4 months <br /> October 11, 1979. with clant operatine at aooroxiriatelv 60% thermal i O 3 l power and 172 MWe, "B" station battery set was removed from service to reoair a faulty 0 4 Icell. The battery was returned to service within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The time out of service l O s l 1s operation in a degraded mode permitted by LCO 4.6.1 and is reportable per Technical O 6 l Specification AC 7. 5.2(b)2. No accompanying occurrence or probable consequences. No 1 0 7 affect on health or safety of the public. I O 8 l  !

7 8 9 80 C E CO E SUSCO E COMPONENT CODE SUSCODE S E 7

O 9 8

I Elrjl @ [g_j @ [y_j @ lq la lT IT lR lY lh Wh dh 9 TO 11 12 13 18 19 20

,_ SEQUENTIAL OCCURRENCE REPORT REVISION LE EVENT YE AR REPORT NO. CODE TYPE NO.

O as=R su RO l 7l 9l l-l l0 14 l8 l ]/ IOl3! lLl l--] l 0l

_ 21 22 23 24 26 27 N N 30 31 32 TK N ACT ON ON PLANT ME HOURS S8 I FOR B. SUPPLI R MANUFACTURER l33A l@]34 Zl@ l35 Zl@ Zl@ 0l 0l 0l Ol l Yl@ l42N l@ lN l@ El3l515!@

36 3/ 40 41 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 1 O I Discoverv of a cell with low specific gravity necessitated removal of "B" station l i i l battery from service. The cell was removed and shioned to the manufacturer 'or I i 7 l repair and the battery returned to service within the 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> allowed by LCO 4.6.1. l i 3 l i 4 I i 7 8 9 80 ST  % POWER OTHER STATUS DIS O RY DISCOVERY DESCRIPTION i s l C l@ l0 6 0l@lN/A l l Bl@l Quarterly Surveillance Testing A TIVITY CO TENT AMOUNT OF ACTIVITY L XATION OF RELEASE 1 6 RELE ASE@D OF RELE ASElZ l l@l lN/A N/A l 7 8 9 to 11 44 45 80 PERSONNEL EXPOSURES NUM9ER TYPE DESCRIPTION i 7 l 0 l 0 l 0 l@l Z l@l N/A l

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PERSONN E L INJU IES NUMBER DESCRIPTION ) s

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7 i a 8 9 0l0l0l@l N/A11 12 80 l

LOSS OF OR DAVAGE TO FActLITY TYPE DE SCRIPTION Lt_L9J 8 9 l Z l@l N/A l 7 to 80

' N IS 7g}g S NLY , M lSUEf@lDE7CRIPTION@ 7 8 9 N 10 N/A l 68 69 llllllll lll lj 80 ; NAME OF PREPARER ,, PHONE:}}