ML19341D720

LER 81-019/01T-0:on 810320,two Walls on Refueling Floor of Each Unit Found Unstable Under Effects of Dbe.Caused by Const or Design Error.Mods Completed to Walls.Mods Scheduled for Unit 3 Prior to Completion of Refueling Outage

ML19341D720
Person / Time
Site:	Peach Bottom
Issue date:	04/03/1981
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19341D719	List: ML19341D718 ML19341D720
References
LER-81-019-01T, LER-81-19-1T, NUDOCS 8104080490
Download: ML19341D720 (1)

Text

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l EVENT DESCRIPTION AND PROSASLE CONSECUENCES h

( pio 4 t l During engins m 7 tion of concrete block walls, two walls on the  !

. -nr3; I refueling floor of each unit were found to be unstable under the effects 1 il f , o # 41 l of an Operating 3 asis Earthquake (033). These walls are adjacent to the t

[ g I vent stack radiaticn monitora and the condi3it accociated with them. Tho j

. io ia 1 l nonitors have remined operable and do not have safety systen logic. In l

a ii1 ! the event of an 03E the plant would be shutdown for other reascns t

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=! i,oIl Cause of occurrence was construction or design error. On March 30. 1981, i

i!ii i nodifications were cenpleted to the Unit 2 valls to assure adecuacy of I 1*i!>1I the walls to withstand a Design 3 asis Earthquake. Sinilar nodifications t l!

!iiaIl will be conpleted en Unit 3 prior to cc=pletion of the current refueling l

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