05000366/LER-1980-105-03, /03L-0:on 800821,nitrogen Pressure Was Lost to Both Standby Liquid Control Sys Accumulators.Caused by a Test Valve Leak & B Test Valve Being Broken While Installing Test Gauge.Test Valves Replaced

/03L-0:on 800821,nitrogen Pressure Was Lost to Both Standby Liquid Control Sys Accumulators.Caused by a Test Valve Leak & B Test Valve Being Broken While Installing Test Gauge.Test Valves Replaced

ML19337A562
Person / Time
Site:	Hatch
Issue date:	09/18/1980
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19337A560	List: 05000366/LER-1980-105, Forwards LER 80-105/03L-0 05000366/LER-1980-105-03, /03L-0:on 800821,nitrogen Pressure Was Lost to Both Standby Liquid Control Sys Accumulators.Caused by a Test Valve Leak & B Test Valve Being Broken While Installing Test Gauge.Test Valves Replaced
References
LER-80-105-03L, LER-80-105-3L, NUDOCS 8009290281
Download: ML19337A562 (2)

LER-1980-105, /03L-0:on 800821,nitrogen Pressure Was Lost to Both Standby Liquid Control Sys Accumulators.Caused by a Test Valve Leak & B Test Valve Being Broken While Installing Test Gauge.Test Valves Replaced

Event date:
Report date:
3661980105R03 - NRC Website

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o13l l Stand-by Liquid Control System Accumulators.

The SBLC system was admin-l o 141 l istratively declared inoperable as per Tech Specs 3/4.1.5.

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The cause of the event was the accumulators "A" test valve leaking and I

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the accumulator "B" test valve being broken while installing a test l

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o LER#: 50-366/1980-105.

Licensee: Georgia Power Company Facility Name: Edwin I. Hatch Docket #: 50-366

Narrative

Report for LER 50-366/1980-105.

During normal operation on August 21, 1980, nitrogen pressure was lost to both Stand-by Liquid Control System Accumulators, 2C41-A003A & B.

The SBLC systems were administratively declared inoperable as per Tech Specs 3/4.1.5.

The cause of the event was the accumulator " A" nitrogen pressure b'eing found at less then 450 psi and nitrogen pressure being lost to accumulator "B" while performi.ng Stand-by Liquid Control System Pump Operability Test and Relief Valve Test, HMP-2-3702.

Investigation of the problems revealed that the accumulator "A" test valve, 2C41-F003A, was leaking and accumulator "B" test valve, 2C41-F003D, had been broken while installing a test gauge during the surveillance. Within one hour of discovery new test valves were installed, accumulators recharged and the system returned to service.

i The purpose of the SBLC accumulators is to dampen the pressure surges of the l

positive displacement SBLC pump.

It is our contention that although the SBLC l;

system has not been analyzed to function without accumulator pressure, the ll system would have performed its design function.

The generic review revealed i

no inherent problems. This is a non-repetitive event and there were no effects on public health or safety due to this event.

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