05000369/LER-1981-039-03, /03L-0:on 810403,pressure Operated Relief Valve Found Lifting While in Automatic W/Associated Block Valve Closed.Caused by Low RCS Pressure Setpoint.Pressure Reduced & Valve Returned to Svc

/03L-0:on 810403,pressure Operated Relief Valve Found Lifting While in Automatic W/Associated Block Valve Closed.Caused by Low RCS Pressure Setpoint.Pressure Reduced & Valve Returned to Svc

ML20005A083
Person / Time
Site:	McGuire
Issue date:	05/02/1981
From:	Ouellette R DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20005A082	List: 05000369/LER-1981-039, Forwards LER 81-039/03L-0.Detailed Event Analysis Encl 05000369/LER-1981-039-03, /03L-0:on 810403,pressure Operated Relief Valve Found Lifting While in Automatic W/Associated Block Valve Closed.Caused by Low RCS Pressure Setpoint.Pressure Reduced & Valve Returned to Svc
References
LER-81-039-03L, LER-81-39-3L, NUDOCS 8106290355
Download: ML20005A083 (1)

LER-1981-039, /03L-0:on 810403,pressure Operated Relief Valve Found Lifting While in Automatic W/Associated Block Valve Closed.Caused by Low RCS Pressure Setpoint.Pressure Reduced & Valve Returned to Svc

Event date:
Report date:
3691981039R03 - NRC Website

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M l While in Mode 5, initial fuel loading, PORV INC34A was lifting while in M i automatic The associated block valve (located in series) was closed, g i Thus the' PORV became inoperable." This constituted a degraded mode of 7

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The actual setpoint was apparently set on the low side. When i the PORV lifted the associated block valve was closed. Pressure was re-i t,,L,1,,,,ji duced and the PORV was returned to an operable status.

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