ML19256G490

Forwards LERs 79-088/03L-0,79-089/03L-0,79-090/03L-0, 79-091/03L-0 & 79-092/03L-0

ML19256G490
Person / Time
Site:	Arkansas Nuclear
Issue date:	12/21/1979
From:	Trimble D ARKANSAS POWER & LIGHT CO.
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19256G491	List: 05000368/LER-1979-088-03, /03L-0:on 791122,during Mode 3 Operation,Emergency Feedwater Flow Control Valve 2CV-1025-1 Failed to Close on Demand from Control Room.Caused by Valve Operator Hydraulic Pressure Being Low.Sys Vented 05000368/LER-1979-089-03, /03L-0:on 791124,during Mode 3 Operation,Emergency Feedwater Flow Control Valve 2CV-1025-1 Failed to Close on Demand from Control Room.Caused by Trash in Valve Operator Hydraulic Sys & Hydraulic Snubber Out of Adjustment 05000368/LER-1979-090-03, /03L-0:on 791125,during Mode 3 Operation,Emergency Feedwater Flow Control Valve 2CV-1025-1 Failed to Close on Demand from Control Room.Caused by Valve Operator Hydraulic Sys Being Low on Fluid.Sys Filled 05000368/LER-1979-091-03, /03L-0:on 791126,during Mode 3 Operation,Dissolved Oxygen Concentration of Reactor Coolant Sys Found Greater than 0.1 Ppm But Less than 0.2 Ppm.Caused by Large RCS Deboration 05000368/LER-1979-092-03, /03L-0:on 791201,during Mode 2 Operation,Emergency Feedwater Flow Control Valve 2CV-1025-1 Failed to Close on Demand from Control Room.Caused by Lack of Hydraulic Pressure Due to Low Fluid Level in Accumulator ML19256G490
References
2-129-12, NUDOCS 7912310383
Download: ML19256G490 (1)

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ARKANSAS POWER & LIGHT COMPANY POST OFFICE BOX 551 LITTLE ROCK. AAKANSAS 72203 (501) 371 t.000 December 21, 1979 2-129-12 Mr. K. V. Seyfrit, Director Office of Inspection & Enforcement U. S. Nuclear Regulatory Comission Region IV 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011

Subject:

Arkansas Nuclear One - Unit 2 Docket No. 50-368 License No. NPF-6 Licensee Event Report Nos. 79-088/03L-0, 79-089/03L-0, 79-090/03L-0, 79-091/03L-0, and 79-092/03L-0 (File:

2-0520)

Gentlemen:

In accordance with Arkansas Nuclear One - Unit 2 Technical Specification 6.9.1.9b, attached are the subject reports concerning the failure of the Er.er-gency Feedwater Flow Control Valve (79-088/03L-0, 79-089/03L-0, 79-090/03L-0, and 79-092/03L-0) and a high oxygen concentration in the Reactor Coolant System

( 79-091/03L-0).

Very truly yours, D& f.

David C. Trimble Manager, Licensing DCT: MAS:ska Attachments cc: Mr. Victor Stello, Jr., Director Mr. Norman M. Haller, Director Office of Inspection and Office of Management and Enforcement Program Analysis U. S. Nuclear Regulatory Com.

U. S. Nuclear Regulatory Com.

Washington, D. C.

20555 Washington, D. C.

20555 Mr. W. D. Johnson U. S. Nuclear Regulatory Com.

P. O. Box 2090 Russellville, AR 72S01 1656 119 n 12a 1 o 3Y3

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