05000265/LER-1981-003-01, /01T-0:on 810202,outboard Steam Isolation Valve MO-2-2301-5 Closed But Would Not Reopen.Caused by Insufficient Torque in Hot Condition to Lift Valve.Valve Limit Switches Adjusted

/01T-0:on 810202,outboard Steam Isolation Valve MO-2-2301-5 Closed But Would Not Reopen.Caused by Insufficient Torque in Hot Condition to Lift Valve.Valve Limit Switches Adjusted

ML20004D714
Person / Time
Site:	Quad Cities
Issue date:	02/13/1981
From:	Hannum D COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20004D708	List: 05000265/LER-1981-003, Forwards LER 81-003/01T-0.Detailed Event Analysis Also Encl 05000265/LER-1981-003-01, /01T-0:on 810202,outboard Steam Isolation Valve MO-2-2301-5 Closed But Would Not Reopen.Caused by Insufficient Torque in Hot Condition to Lift Valve.Valve Limit Switches Adjusted
References
LER-81-003-01T, LER-81-3-1T, NUDOCS 8106090677
Download: ML20004D714 (1)

LER-1981-003, /01T-0:on 810202,outboard Steam Isolation Valve MO-2-2301-5 Closed But Would Not Reopen.Caused by Insufficient Torque in Hot Condition to Lift Valve.Valve Limit Switches Adjusted

Event date:
Report date:
2651981003R01 - NRC Website

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LICENSEE EVENT REPORT I

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REPOR T OATE 80 EVENT DESCRIPTION AND PROSABLE CONSEQUENCES h o 2 l At 2215 while performing HPCI valve operability test, outboard steam isolation l

o 3 l valve MO-2-2301-5 was closed but would not re-open.

RCIC had been made Inoperable l

ITTT1 I prior to this time. Consequently, an immediate Reactor shutdown was started in 1

q j accordance with Technical Specification 3.5.C.3. and 3 5.E.3 Auto pressure relief l

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44 33 39 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS lilOj l Valve MO-2-2301-5 had been demonstrated operable in the cold condition on February

_l li li j l 1, 1981. However, in the hot condition more toraue was required to lift the valve j

gl disc off the seat. The valve limit switches were adjusted and the valve demonstrated l l,i3i l operable on February 2,1981.

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