05000366/LER-1980-117-03, /03L-0:on 800803,w/reactor in Run Mode & While Performing HNP-2-3184,it Was Discovered That Reactor Core Isolation Cooling Turbine Could Not Be Reset & Throttle Valve Did Not Have Light.Caused by Inadequate Procedure

/03L-0:on 800803,w/reactor in Run Mode & While Performing HNP-2-3184,it Was Discovered That Reactor Core Isolation Cooling Turbine Could Not Be Reset & Throttle Valve Did Not Have Light.Caused by Inadequate Procedure

ML19344E124
Person / Time
Site:	Hatch
Issue date:	08/19/1980
From:	Baxley S GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19344E120	List: 05000366/LER-1980-117, Forwards LER 80-117/03L-0 05000366/LER-1980-117-03, /03L-0:on 800803,w/reactor in Run Mode & While Performing HNP-2-3184,it Was Discovered That Reactor Core Isolation Cooling Turbine Could Not Be Reset & Throttle Valve Did Not Have Light.Caused by Inadequate Procedure
References
LER-80-117-03L, LER-80-117-3L, NUDOCS 8008260670
Download: ML19344E124 (2)

LER-1980-117, /03L-0:on 800803,w/reactor in Run Mode & While Performing HNP-2-3184,it Was Discovered That Reactor Core Isolation Cooling Turbine Could Not Be Reset & Throttle Valve Did Not Have Light.Caused by Inadequate Procedure

Event date:
Report date:
3661980117R03 - NRC Website

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fd to EVENT DATg 14 7b HE PO8ti D AT E F0 EVENT oESCRIPTioN AND PHo0AOLE CONSEoVENCES lDuring normal operation with Reactor in run mode and while performing HNP-2-3184, Re-l o 2 l mote Shutdown Panel Instrumentation Channel Check, it was determined the RCIC Turbine l o 3 ioi q lcould not be reset and the trip and throttle valve did not have any indicating light. l y o,si ;There were no effects upon public health and safety due to this event. This is a non-l l repetitive event and is not applicable to Unit I.

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33 J4 35 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h Ii10lIThe cause of the failure has been attributed to inadequate nrocedure: failure to in-I lilil 1struct operator to verify that indication for the trip and throttle valve returned.

I lThe procedure is being revised to instruct operator what will occur when the transfer I i 2 l switch is placed in emergency and normal position.

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NARRATIVE

REPORT On August 3,1980 at 1305, while performing liNP-2-3184 Remote Shutdown Panel Instrumentation, after placing the RCIC Turbine flow-control transfer switch to normal position, the alarm in the Main Control Room

" Remote Shutdown Transfer Switch in Emergency position" cleared; but, the indication for the trip and throttle valve did not return to normal as it should have.

At this time the RCIC system was declared inop and a 14 day LC0 was i

initiated. Operator should have been able to rer.t RCIC system at this time.

1 A Maintenance Request was written (MR 2-80-3148) to have the Maintenance i

Shop investigate the reason the trip and throttle valve did not have in-dication.

While the Maintenance Request was being processed the operator transferred the RCIC Turbine flow-control transfer switch to emergency position and back to normal at which time the RCIC trip and throttle valve indication returned to normal and al16wed the RCIC system to be reset at 1400 on August 13, 1980.

There were no effects upon the public health and safety due to this event.

This event is not a reoccurring problem and is not applicable to the other unit.

HNP-2-3184 Remote Shutdown Panel Instrumentation Channel Check will be revised to insure that when the RCIC flow-control transfer switch is re-turned to the normal position, verify that the indication on the trip and throttle valve return to normal and RCIC system can be reset.