05000366/LER-1979-024-03, /03L-0 on 790214:while Performing Startup Test Procedure HNP-2-10925,safety Relief Valves C & G Failed to Open.Cause Unknown.Topworks Have Been Replaced & Followup Rept Will Be Written When Investigation Is Complete

/03L-0 on 790214:while Performing Startup Test Procedure HNP-2-10925,safety Relief Valves C & G Failed to Open.Cause Unknown.Topworks Have Been Replaced & Followup Rept Will Be Written When Investigation Is Complete

ML19273B567
Person / Time
Site:	Hatch
Issue date:	02/28/1979
From:	Thomas Greene GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19273B566	List: 05000366/LER-1979-024, Forwards LER 79-024/03L-0 05000366/LER-1979-024-03, /03L-0 on 790214:while Performing Startup Test Procedure HNP-2-10925,safety Relief Valves C & G Failed to Open.Cause Unknown.Topworks Have Been Replaced & Followup Rept Will Be Written When Investigation Is Complete
References
LER-79-024-03L, LER-79-24-3L, NUDOCS 7904090177
Download: ML19273B567 (1)

LER-1979-024, /03L-0 on 790214:while Performing Startup Test Procedure HNP-2-10925,safety Relief Valves C & G Failed to Open.Cause Unknown.Topworks Have Been Replaced & Followup Rept Will Be Written When Investigation Is Complete

Event date:
Report date:
3661979024R03 - NRC Website

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At 2148 CST 2/14/79 while perfonning startup test procedure HNP-2-10925, MSIV clos-l ure, safety relief valves 2B21-F013 C and G failed to open with its 1090 Psig set-I 1 o 13 l l o 4 l

points in the presence of a reactor high pressure of 1125 Psig.

Safety relief valvej C and G were declared inoperable and a maintenance request was initiated to replace ;

lo Isl 1 C and G with new topworks of the same pressure setpoints.

The other 9 safety reliefg lo lc l 1

valves were available at the time of the scram.

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1. 308) and G (Serial #310) is unknown.

The top-I l i i 21 I works have been replaced.

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