05000313/LER-1979-023-03, /03L-0:on 791221,during Normal Makeup Operation, Boric Acid Pumps Left Operating,Resulting in Overboration of Reactor Coolant & Automatic Withdrawal of Rod.Caused by Reactor Operator Oversight.Operator Counseled

/03L-0:on 791221,during Normal Makeup Operation, Boric Acid Pumps Left Operating,Resulting in Overboration of Reactor Coolant & Automatic Withdrawal of Rod.Caused by Reactor Operator Oversight.Operator Counseled

ML19262C001
Person / Time
Site:	Arkansas Nuclear
Issue date:	01/18/1980
From:	Bramlett L ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19262B999	List: 05000313/LER-1979-023, Forwards LER 79-023/03L-0 05000313/LER-1979-023-03, /03L-0:on 791221,during Normal Makeup Operation, Boric Acid Pumps Left Operating,Resulting in Overboration of Reactor Coolant & Automatic Withdrawal of Rod.Caused by Reactor Operator Oversight.Operator Counseled
References
LER-79-023-03L-01, LER-79-23-3L-1, NUDOCS 8001220402
Download: ML19262C001 (1)

LER-1979-023, /03L-0:on 791221,during Normal Makeup Operation, Boric Acid Pumps Left Operating,Resulting in Overboration of Reactor Coolant & Automatic Withdrawal of Rod.Caused by Reactor Operator Oversight.Operator Counseled

Event date:
Report date:
3131979023R03 - NRC Website

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NRC FORM 364 U. S NUCLE AR REGUL ATORY COMMIS$ TON (777)

LICENSEE EVENT REPORT EXHIBIT A CONTROL BLOCS 0 l l l l l.lh IPLE ASE PRINT OR TYPE AL( REQUIRED INFORMATIONI i

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60 69 DOCatt hum.gp td 69 (VENT DAYg la 76 HFFOMToaTE 80 EVENT OESCRIPTION AND PROB AOLE CO%EOVENCES h TFTT11 Durina a normal makeup operation to the RCS. the boric acid pumps were i

EI)) t inadvertantly left operatino.

This resulted in over boration of the reactor coolant and automatic withdrawal of rods above the limits per i

io ni e s i T.S.3.5.2.5.3.

The RCS was inmediately diluted and the rod index was I

returned to the normal range within the allotted 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />. LER 50-313/78-075 o o I was a similar occurrence of the rod index out of limit.

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The operator was counseled and i,,,i copies of the failure report were distributed to all licensed operators.,

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