ML19207B865

LER 79-024/01T-0:on 790815,during Response Tests for IE Bulletin 79-02,three or Four Failed Anchor Bolts Were Found on Support to 3D RHR Pump Section Piping.Caused by Improper Installation.Bolts Replaced & Passed Insp

ML19207B865
Person / Time
Site:	Peach Bottom
Issue date:	08/29/1979
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19207B859	List: ML19207B858 ML19207B865
References
LER-79-024-01T-01, LER-79-24-1T-1, NUDOCS 7909050443
Download: ML19207B865 (1)

Text

w on. A% H S NULLE AH HuiUL AIOhV COMMMMUN l15 Unit 3 LICENSEE EVEN i HEPORI Ite po r t No. 3-79-2h/1T CON HOL DLOCK. l l l l l 'l l  ;.LE ASE PHINT OR TYPE ALL REQUIRED INFOnMATION)

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 2 Inspection program performed in response to IE Bulletin 79-02 identified i 3 1 3 of L test failed anchor bolts in one saport en the 3D RHR pump suct- l 4 ion piping. During a seicnic event with the failed anchor support the ]

"[Tl [ piping system could possibly fail and caase ficoding in one of four RHR l TT) I rocms. Because redundant RER pumps and backup Core Spray System are j i7 l available, safety significance is censidered mini"vtl.

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44 41 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS o l The most probable cause of failure was improper installation. The three I yl test failed anchor bolts were replaced with wedre type anchors and I 7 l successfully torque tested.

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NAME OF PREPARER

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PHONE-(215) 841-5020 o