05000293/LER-1981-037-03, /03L-0:on 810710,control Room Alarms Indicated Trouble W/Seal Flow on Recirculation Pump A.Caused by Seal Flange O Ring Failure Resulting in Overheating of Both Seal Stages.Pump Seals Replaced

/03L-0:on 810710,control Room Alarms Indicated Trouble W/Seal Flow on Recirculation Pump A.Caused by Seal Flange O Ring Failure Resulting in Overheating of Both Seal Stages.Pump Seals Replaced

ML20010B445
Person / Time
Site:	Pilgrim
Issue date:	08/05/1981
From:	Whitney G BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20010B442	List: 05000293/LER-1981-037, Forwards LER 81-037/03L-0 05000293/LER-1981-037-03, /03L-0:on 810710,control Room Alarms Indicated Trouble W/Seal Flow on Recirculation Pump A.Caused by Seal Flange O Ring Failure Resulting in Overheating of Both Seal Stages.Pump Seals Replaced
References
LER-81-037-03L, LER-81-37-3L, NUDOCS 8108140477
Download: ML20010B445 (1)

LER-1981-037, /03L-0:on 810710,control Room Alarms Indicated Trouble W/Seal Flow on Recirculation Pump A.Caused by Seal Flange O Ring Failure Resulting in Overheating of Both Seal Stages.Pump Seals Replaced

Event date:
Report date:
2931981037R03 - NRC Website

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NHC T ORM'366 U. S. NUCLEAR REGULATORY COMMISSION (7 77)

LICENSEE EVENT REPORT CONTROL 8 LOCK: ]

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8 60 61 DOCKET NUM8ER 68 69 EVENT DATE 14 75 REPORT DATE 6J EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h fo 121 l On July 10. 1981. Control Room alarms indicated emnblo e.7f eh non1 finu nn "A"

l lo i3I l Recire. Pump.

Drywell leakane was calculated at 5. 22 cmm.

A controlled shutdown l

l o 141 l was initiated in accordance with Tech. Spec. 3.6.C.1.

NRC was notified. A I

Io Isi I drywell entry was made to determine cause.

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40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 litoll Investigation revealed the seal flange "0" ring had failed and both seal stages l

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