05000293/LER-1980-006-03, /03L-0:on 800115,strut Bushing Insert on RHR Sys snubber,SS-10-10-46,found Turning Freely within Strut.Caused by Lack of Strut to Strut Bushing Weld.Weld Performed to Restore Operable Status

/03L-0:on 800115,strut Bushing Insert on RHR Sys snubber,SS-10-10-46,found Turning Freely within Strut.Caused by Lack of Strut to Strut Bushing Weld.Weld Performed to Restore Operable Status

ML19296B488
Person / Time
Site:	Pilgrim
Issue date:	02/07/1980
From:	Mcloughlin M BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19296B484	List: 05000293/LER-1980-006, Forwards LER 80-006/03L-0 05000293/LER-1980-006-03, /03L-0:on 800115,strut Bushing Insert on RHR Sys snubber,SS-10-10-46,found Turning Freely within Strut.Caused by Lack of Strut to Strut Bushing Weld.Weld Performed to Restore Operable Status
References
LER-80-006-03L, LER-80-6-3L, NUDOCS 8002200652
Download: ML19296B488 (1)

LER-1980-006, /03L-0:on 800115,strut Bushing Insert on RHR Sys snubber,SS-10-10-46,found Turning Freely within Strut.Caused by Lack of Strut to Strut Bushing Weld.Weld Performed to Restore Operable Status

Event date:
Report date:
2931980006R03 - NRC Website

text

N RC F ORM 366 U. S. NUCLE AR RE GUL AToRY COMMISS JN (1 719, LICENSEE EVENT REPORT e@

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1. ,s 6'3 EVENT DATE 14 75 REPORT DAT E 80 EVENT DESCRIPTION AND PROR ABLE CONSEQUENCES h goj2; On January 15, 1980 while performing a snubber inspection, the strut bushing insert

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on R]iR System snubber number SS-10-10-46 was determined to be turning freely within l

o lng4l lits strut. The snubber is located in an accessible area within the torus room. The l [oisj snubber was repaired and returned to service. The snubber surveillance interval will l

[ be reduced as required by PNPS Technical Specifications as a result of this event.

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40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS lA strut to strut bushing veld was performed to restore the snubber to operable status, i

o g,ii; lThe lack of this weld allowed the snubber to slide freely within its supporting strut.]

,,,,, g he installation of this snubber and subsequent inspections, although noting an un-l T

g,,3; jusually long snubber stroke, failed to detect this defect. Safety related snubbers l

g, [4 i ;at PNPS have been inspccted and we are confident that this is an isolated case.

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NAME OF PREPARER PHONE: