05000278/LER-1979-024-01, /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

/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: 05000278/LER-1979-024, Forwards LER 79-024/01T-0 05000278/LER-1979-024-01, /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 ML19207B858 ML19207B865
References
LER-79-024-01T-01, LER-79-24-1T-1, NUDOCS 7909050443
Download: ML19207B865 (1)

LER-1979-024, /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

Event date:
Report date:
2781979024R01 - NRC Website

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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

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.LE ASE PHINT OR TYPE ALL REQUIRED INFOnMATION)

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d 60 61 DOCKET NUMBER 6d bd EVENT 04Tt 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h Inspection program performed in response to IE Bulletin 79-02 identified i

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1 3 of L test failed anchor bolts in one saport en the 3D RHR pump suct-l ion piping. During a seicnic event with the failed anchor support the

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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

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8 9 80 SYSTEM

CAUSE

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30 31 32 ACTION CUTUHG EFFECT SH ' 1100 W N ATT ACHMENT NPRC 4 PniME COMP COMPONEN1 TAKEN ACTION ON Pt. AN T VETHOD HOCHS (-

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40 41 42 43 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

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successfully torque tested.

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