ML20008E885

LER 81-010/03L-0:on 810207,total RHR Flow Exceeded Tech Specs.Caused by Air Line Supplying Actuator on RHR Valve Breaking,Allowing Valve to Fail Open.Rhr Flow Reset.Rigid Air Supply Lines to Be Replaced W/Flexible Lines

ML20008E885
Person / Time
Site:	McGuire
Issue date:	03/09/1981
From:	Ouellette R DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20008E882	List: ML20008E881 ML20008E885
References
LER-81-010-03L, LER-81-10-3L, NUDOCS 8103100449
Download: ML20008E885 (1)

Text

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• N surveillance the control operator di wovered total RHR flow I ry m treturn at about 1500CPMratherthanthe3000GPMrequiredbyTechnicalSpecif}-

i3,.i tcation 4.9.8.1. Only new fuel was installed in the core so overheating was ,

i o . s i Lnot a oroblem. Normal functions of the RHR systen were not needed so the safe, 13..i toperation of the plant and the health and safety of the public were not affect 9d lo e r! !

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i . i ci 1 An air line supplying the actuator on an RHR valve broke and allowed the t,,iitvalve to fail open. The RHR flow was set back to 3000 GPM. All rigid air ,

i .-! I sesonly lines are being replaced with flexible lines. Operating procedures for,

[,,3y[ the RHR system will be modified and more frequent surveillance of the system ,

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