ML20028B750

LER 82-032/03L-0:on 821029,auxiliary Operator Discovered Nuclear Blowdown Monitor Tank Damaged.Caused by Distorted Diaphragm Blocking Tank Overflow & Vent Paths.Diaphragm Removed & Tank Repaired

ML20028B750
Person / Time
Site:	Summer
Issue date:	11/24/1982
From:	Koon A SOUTH CAROLINA ELECTRIC & GAS CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20028B730	List: ML20028B729 ML20028B750
References
LER-82-032-03L, LER-82-32-3L, NUDOCS 8212030202
Download: ML20028B750 (1)

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EVENT OESCRIPTION ANO PROBABLE CONSEQUENCES l o l2 I l On October 29. 1982 with the Plant in Mode 2, Auxiliary Operator discovered i 101311 Nuclear Blowdown Monitor Tank damaaed. This tank is required by Technical l lo 14 l I Specification 3.11.1.3 as cart of the Liauid Radwaste System. There were no l I l'Il-adver4a-consequences even though ne releases could be made k m, thh unk I lolell l lol7ll l l

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. .. .. a a 18 UJer CAL'SE DESCRIPTION AND CORRECTIVE ACTIONS h IilolI The cause was that the diaphraam located inside the tank distorted such that it l I i li I L_ blocked off the tank overflow and vent oaths. As tank level was increased. I lil2ll pressure buildup caused damage to the tank. The tank was immediately tagged l l il a l l out of service. Subsequently, it was repaired and returned to service without l lil4ll diaphragm installed. l

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