05000293/LER-1979-039-01, /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

/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: 05000293/LER-1979-039, Forwards LER 79-039/01T-0 05000293/LER-1979-039-01, /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
References
LER-79-039-01T, LER-79-39-1T, NUDOCS 7910260256
Download: ML19259D692 (1)

LER-1979-039, /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

Event date:
Report date:
2931979039R01 - NRC Website

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8 60 61 DOCK ET NUMBER 68 63 EVENT DATE 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

l re-analysis of "B" RBCCW System indicated the as-built configuration would not remain l lo la l ITTTl functional during Safe Shutdown Earthquake.

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40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h lilollThis event resulted from a design error. The three suonorts have been modified per I

l PDCR 79-24 A-1 and the system has been returned to norm 1.

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7 8 9 10 Gerald G. Whitney 617-746-7900 o

NAME OF PREPARER PHONE: