ML20027A393

LER#78-051/03X-1 on 780907:during Surveillance Test Dis 1600-11,valve 2-1601-24 Failed to Operate in Specified Time Limit.Caused by Foreign Matter Lodged in Solenoid Operated 4 Way Valve,Preventing Proper Bleed Off

ML20027A393
Person / Time
Site:	Dresden
Issue date:	10/17/1978
From:	Cieszkiewicz S COMMONWEALTH EDISON CO.
To:
Shared Package
ML17173A380	List: ML17173A379 ML20027A393
References
LER-78-051-03X, LER-78-51-3X, NUDOCS 7811240211
Download: ML20027A393 (1)

Text

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UPDATE REPORT - PREVIOUS LICENSEE EVENT REPORT REPORT DATE: 10-02-78 l

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lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMAT15N1 O l t l lI j'L l D l R l Sl 2l@l0 10 l- l0 10l0l0!0 l- l0 l0 l@l 25 4 l 1l 26 11 1l 1l@l57 CAT LICENSE TYPE Jo l

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REPQRT DATE d 60 61

• DOCKET NUMegR 6d EVENT D ATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h o I :: l l While performing surv. DIS 1600-11 (Press. Suppression Air Oper. Viv. press sw. setotj l

o i3; l ck.) valve 2-1601-24 failed to operate in the specified time limit required by T.S. I I

o i41 l 427.D.1.a, Table 3.7.1. Safety significance mininal because redundant (inboard) iso-l t

o isi I lation valve was operable and would have provided containment integrity within spec- l 0 i6 l l ified times as required. This is the first occurrence of this type at Dresden. I I

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43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTICNS h i 10 l l Probable cause-foreign matter lodced in solenoid coerated 4 wav valve' the7ehv nre- l ~

9ilillvhntingproperbleedoff. Subsequent testing and external inspection revealed no I g l l abnormalities. With exception to the initial valve operation all subsequent operationsl I

,;3g l were well within the specified times setforth in the Tech. Specs. Because of the l*

,,4, l singular nature of the event no further actions are' deemed necessary. I 7 8 9 .

80 ST U  % POWER OTHER STATUS 15 0 RY DISCOVERY OESCRIPTION i1 l 5 l [E_j@ l 0 l 9 I 5 lhl NA l l,J,jhl Surveillance Testine  !

ACTIVITY CO TENT r.ELEASED OF RELE ASE AMOUNT OF ACTIVITY LOCATION OF RELE ASE 1 l6l NA l l NA l 3 9

@ l10Z l@l 11 44 45 80 PER5CNNEL EXPOSURES NUMBER TYPE OESCRIPTION -

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PERSONNE L INJURIES NUMBER O ESCRIPTION@

1 181 10 10 ! Ol@l12 NA 7 8112 4 0 'L O l 8 9 11 80

' " LOSS OF oR O AMAGE To F ACILITY TYPG OESCR PTION it Isl [z j@l NA l S T e 10 80

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