ML20090D873

Preliminary AO-50-219/74-55:on 741018,during Surveillance Test,Containment Spray Pump 51A Failed to Start in Automatic Mode When Subjected to Signals.Cause Under Investigation

ML20090D873
Person / Time
Site:	Oyster Creek
Issue date:	10/21/1974
From:	Carroll J JERSEY CENTRAL POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20090D872	List: ML20090D864 ML20090D873
References
AO-50-219-74-55, NUDOCS 8303030736
Download: ML20090D873 (3)

Text

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To: James P, O'Reilly Directorate of ilegulatory Opera:ic::.1 P,egion 1 631 Park Aver. :o King of Prussia, Pennsylvania 19406 P:so: Jersey Centr:1 Powcr 4 Light Cc pcay Oyster Creek Nucient Generating Station Docket GG-213-Forked River, frew Jersey 08731 fin'dtct: Abnorr.al Occurrence Report No. 50-219/?4/35

%o following is a prejininary report belt subnitted in c071 fen with ths Technical OpciS:in:sticas, paragraph 6,6s2, Prelinin2rf A;prmh by.I r

_ che , _g L/10/21/74 J. T. CarroI; ,'u/r.4 Date er: W. A. Citrhusso g7 FOS e p S

'eport R unte: 10/_Q4 occurrence: [Itvis/ 74  ;

Initial Written Tino of f Report Date: 10/21/74 Occurrence: 1515 i

OYS1TR CREEK NUCLEAR GENERATING STATION I FORKED RIVER NEif JERSEY OS731  !

i Abnorrail Occurren^o Report No. 50-219/74/ 55

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IDShTIFICATION Failure of Containment Spray Purp SIA to start when called  ;

0F OCCURRENCE:

upon to do so. 3 O

'Ihis event is considercJ to be an abnorral occurrence as de-fined in the Technical Specifications, paragraph 1.1SD.

CONDITICNS PRIOR x Sterdy State Power ,Routina shutdown ,

'IU OCCU2RE!;CE: Ilot Standby Operation Cold Shutdc.m imad Qanges During "

Refueling Shutdown Routins Fever Operation Routine Stcrtup _ Cthcr (Specify)

Operatica __

Power: Reactor,1904 Mit .

Elcetric, 642 120  !

Plow: Recire.16.0 X 104 gpn Stack Gas: -

Ibb b /s c DESCRIPTICN It was observed on Friday, October 18,1974, at 1515, during 0F OCCU.T.ETCE:  :

the conthly surveillance test of the contaircent spray systen that Containment Spray Purp 51A failed to start in the auto-natic node when subjected to sialated low-low re:^ tor water Icyc1 and high drywell pressure signals. It was observed that the " leg failure" alara initiated approxirntely 57 seconds ,

after the start signal was applied. In en atte pt to troubic-  ;

shoot the cause of the p:g ralfunction, the surveilknee was  !.~

again perforced while n.uitoring the action of the 45 second s i

k h

Ahnnbral_ Occurrence 9 9 .

Report No. 50-219/74/55 Pago 2 tina dolay relay, TKI, in the start circuit for the purp. It was observed that the 51A picp successfully started at this tics and all aspects of its operation were found to be normal.

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APPARE!T CAUSE Design Procedure C7 OCCUGE;CE: I!anufuttuns Un'ssual Survice Cen:!iticn Instalhtien/ Inc. ST ronxntal Cens trttction Concient Failure Operator _

_ Other (Specify) h cause of the occurrence is presently tudor investiption ANALYSIS OF 1ho only significance associated with the failure of 51A to OCCU:',PIfiCH:

start 's in a foss of systen redundcacy, ibd conditions crisen requiring contclt: ant spray, hp 51C would have started autoratically nnd perforced the containment heat removal function. In addition, the canually initiated backup Pu ps 51B for System 1 cnd SID for Systen 2 were oporchie and could have been initiated. The contain cnt heat removal function can be cdequately supplied by a single containment spray ptcp.

CORRECTIVE Sinco the failuro of the purp to start did not repeat on the ACTION:

second surveillance test, the cause for the initial failure was indeterminab1c.

FAILUPI DATA: Not cpplicabic.

Prepared by: >

• 9/Q / 'f)l, Dato: 10/21/M

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