ML19259D692

LER 79-039/01T-0:on 791009,re-analysis of safety-related Sys Indicated as-built Configuration Would Not Remain Functional During Sse.Caused by Design Error.Three Supports Have Been Modified & Sys Is Normal

ML19259D692
Person / Time
Site:	Pilgrim
Issue date:	10/22/1979
From:	Whitney G BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19259D686	List: ML19259D685 ML19259D692
References
LER-79-039-01T, LER-79-39-1T, NUDOCS 7910260256
Download: ML19259D692 (1)

Text

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74 75 HEPORT DATE B0 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h lo l 2 l l On October 9,1979, Bechtel Corporation notified Pilgrim Station that an analytical I lo la l l re-analysis of "B" RBCCW System indicated the as-built configuration would not remain l ITTTl functional during Safe Shutdown Earthquake. I o 5 I

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3b 3/ 40 42 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h lilollThis event resulted from a design error. The three suonorts have been modified per i i l PDCR 79-24 A-1 and the system has been returned to norm 1. I I

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i a l i 4 i _ J 80 7 8 9 STA 5  % POWER OTHER STATUS DISCO RY DISCOVERY DESCHiPTION N.A. [@l Engineering Evaluation i 5 W@ l0 l8 l0 l@l l l l A TIVITY CONTENT RELE ASED OF RE L E ASE AMOUNT OF ACTIVITY LOCATION OF RELE ASE N.A. N.A. l FlM W @ W@l l PERSONNEL EXPOS ES l

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7 8 9 10 Gerald G. Whitney 617-746-7900 o NAME OF PREPARER PHONE: