ML19340B275

LER 80-067/01T-0:on 801002,analytical Reanalysis of B RHR Sys Indicated That as-built Configurations of Sys Would Not Remain Functional During Sse.Caused by Design Error.Seismic Anchor Modified to Meet Criteria

ML19340B275
Person / Time
Site:	Pilgrim
Issue date:	10/10/1980
From:	Graham E BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19340B268	List: ML19340B267 ML19340B275
References
LER-80-067-01T, LER-80-67-1T, NUDOCS 8010210724
Download: ML19340B275 (1)

Text

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Y. . LICENSEE EVENT REPORT CONTROL BLOCK: l l l l l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h

[612 l l On October 2, 1980 Boston Edison Co. Engineering Dept. notified Pilgrim Station l lo la l l that an an '.ytical re-analysis of "B" RHR System inc'Acated that the as built con- l

o ;4 l l figurations of .the "B". RHR System would not remain functional during a Safe Shut- l 10151 I down Earthquake. The Station was in a cold shutdown condition at this time. l 10 is 1 I l J o l 71 l I l o is i i 80 I

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'lC l Fl@ l B l@ l A l@ l S l Ul P l 0 l R l T lh {@ l Zlh 9 10 11 12 13 18 19 20 SEoVENTIAL OCCURRENCE REPORT REVIS!CN LER/Ro EVENT YEAR REPORT NO. CODE TYPE NO.

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44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTICNS h ji loI l This event resulted from a desien error. The unit was maintained in a shutdowti l Ii ii l l condition and a seismic anchor was modified to allow the system to meet the- sa fe I i,,7, l shutdown earthquake criteria. The modification was completed and the unit started I g,,3; l up on October 5,1980. l l i 161 l - l 7 8 9 80 STA  % PCWER OTHER STATUS . Ots Y DISCOVERY OESCRIPTION N.A. Support Inspection l1158 l l Gl@ l 0 l 0 l 0 l@l 7

l lCl@l l AbviTY CC$ TENT r.ELEASED OF RELEASE AMOUNT CP ACTIVITY LOCATION OF RELEASE l116 l-l Zl @ l Z lgl N.A. l l N.A. l 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION l 1 l 7 l l 0l 0 l 0 l@l Z l@l N.A. l PERSONNEL inauYiES '

UM ER DESCRIPTION 11 la l l l l 0l@j N.A. l 7- 8 9 11 12 8C LOSS CP OR OAMAGE TO PACluTY Q TYPE DESCRIPTION v N.A. l l1l9 8 9 l l 0l@l10 60 7 -

PU8LICITY NRC USE ONLY

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