05000254/LER-1980-019-03, /03L-0:on 800817,while Operating at 400 Mw,After Performance of Reactor Core Isolation Cooling Monthly Pump Operability Surveillance Test,Flow Controller Was Left in Manual.Caused by Operator Failure to Readjust to Automatic

/03L-0:on 800817,while Operating at 400 Mw,After Performance of Reactor Core Isolation Cooling Monthly Pump Operability Surveillance Test,Flow Controller Was Left in Manual.Caused by Operator Failure to Readjust to Automatic

ML19344F090
Person / Time
Site:	Quad Cities
Issue date:	08/25/1980
From:	Kopacz J COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19344F085	List: 05000254/LER-1980-019, Forwards LER 80-019/03L-0 05000254/LER-1980-019-03, /03L-0:on 800817,while Operating at 400 Mw,After Performance of Reactor Core Isolation Cooling Monthly Pump Operability Surveillance Test,Flow Controller Was Left in Manual.Caused by Operator Failure to Readjust to Automatic
References
LER-80-019-03L-04, LER-80-19-3L-4, NUDOCS 8009120399
Download: ML19344F090 (2)

LER-1980-019, /03L-0:on 800817,while Operating at 400 Mw,After Performance of Reactor Core Isolation Cooling Monthly Pump Operability Surveillance Test,Flow Controller Was Left in Manual.Caused by Operator Failure to Readjust to Automatic

Event date:
Report date:
2541980019R03 - NRC Website

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LER NUMBER: LER/R0 80-19/03L 11.

LICENSEE NAME: Commonwealth Edison Company quad-Cities Nuclear Power Station lil.

FACILITY NAME: Unit One IV.

DOCKET NUMBER: 050-254 V.

EVENT DESCRIPTION

On August 17, 1980, with Unit One operating at 400 MWe, the RCIC Monthly Punip Operab!Ilty Surveillance was performed. At the conclusion of the test the flow controller was inadvertently lef t in MANUAL at a reduced flow.

VI.

PROBABLE CONSEQUENCES OF THE OCCURRENCE:

The Reactor Core Isolation Cooling System is designed to supply makeup cooling water to the reactor vessel should the main condenser become isolated from the reactor, with normal feedwater unavailable. The HPCI System was operable at all times the RCIC flow controller was in the MANUAL mode. No other RCIC components were affected by this event.

Had ar RCIC automatic initiation event taken place, the system valves would have lined up properly, and partial flow would have been provided.

Vll. CAUSE:

At the conclusion of the pump operability surveillance the Unit Licensed Operator failed to place the flow controller into AUTO.

Vill. CORR,ECTIVE ACPION:

The immediate action upon detection of the occurrence was to place the flow controller into AUTO. The Shift Technical Advisors are presently accompanying the operators during their panel checks to provide additional assurance of correct Control Room panel line-ups. This event is being discussed with those operators involved.

Procedures were reviewed, and i

no additions or changes are deemed necessary.

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