05000244/LER-1983-016-03, /03L-0:on 830418,during Maint,Pinhole Leak Discovered on Boric Acid Transfer Sys Branch Connection Off Boric Acid Filter Outlet.Caused by Intergranular Attack Due to Stress Corrosion Cracking.Piping Will Be Replaced

/03L-0:on 830418,during Maint,Pinhole Leak Discovered on Boric Acid Transfer Sys Branch Connection Off Boric Acid Filter Outlet.Caused by Intergranular Attack Due to Stress Corrosion Cracking.Piping Will Be Replaced

ML20023D061
Person / Time
Site:	Ginna
Issue date:	05/06/1983
From:	Schuler T ROCHESTER GAS & ELECTRIC CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20023D059	List: 05000244/LER-1983-016, Forwards LER 83-016/03L-0 05000244/LER-1983-016-03, /03L-0:on 830418,during Maint,Pinhole Leak Discovered on Boric Acid Transfer Sys Branch Connection Off Boric Acid Filter Outlet.Caused by Intergranular Attack Due to Stress Corrosion Cracking.Piping Will Be Replaced
References
CAR-1411, LER-83-016-03L, LER-83-16-3L, NUDOCS 8305190175
Download: ML20023D061 (2)

LER-1983-016, /03L-0:on 830418,during Maint,Pinhole Leak Discovered on Boric Acid Transfer Sys Branch Connection Off Boric Acid Filter Outlet.Caused by Intergranular Attack Due to Stress Corrosion Cracking.Piping Will Be Replaced

Event date:
Report date:
2441983016R03 - NRC Website

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LICENSEE EVENT REPORT CAR 1411 CONTROL BLOCK:

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60 81 ooCKET NuMOER 68 69 EVENT oATE 74 75 RtPoRT oATE 80 EVENT DESCRIPTION ANO PROSA8LE CONSEQUENCES h

. o I 2 I l While performing maintenance in the boric acid storage tank room, a small pinhole l

m l 1eak was discovered on the Boric Acid Transfer System branch connection off the Borie l

,o#4l l Acid Filter outlet. The leak was in the 3/4" 150 psi schedule 10 stainless steel l

t o Isl l piping adjacent to the weld on V-349C, shutoff valve for PI-109. The plant was in l

l o Is I l cold shutdown for a refueling outage at the time of discovery. A temporary patch was go;;; l installed on the leak to allow the system to remain in operation for providing l

e o ia l I makeup capability during steam generator channel head decon operations.

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33 37 40 41 42 43 44 47 CAuSE DESCRIPTION AND CORRECTIVE ACTIONS h lli l o i l The cause of these leaks is attributed to intergranular attack due to stress l

I-- corrosion cracking-Action-to-be -taken-during-this~ outage will...ba. to replace _the-._

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gl affected sections..of piping and fittings, and any other suspect sections of piping l

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Future corrective action is being investigated by our Engineering Department.

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES This leak was discovered while preparing to replace a portion of the "A" Boric Acid Transfer Pump discharge piping. That piping was being replaced as a result of a leak, discovered on 12/19/82,-in the 2" 150 psi schedule

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10 weld at a 90 elbew near V-341. At that time, a temporary patch was installed to maintain the system operable until repairs could be completed.

Other. leaks have occured on'this piping as reported on LER 79-008, LER 4

81-006, and LER 82-027.

This item is reportable per Tech. Spec. 6.9.2.b(4) i CAUSE DESCRIPTION AND CORREC11VE ACTIONS Redesign or modification work on this sytem is currently' scheduled to

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commence in 1984 as part.of Engineering Work Request, EWR-3092.

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