05000313/LER-1979-021-03, /03L-0:on 791115,while Securing Makeup & Purification Sys,Inside Containment Isolation Seal Return Valve Failed to Fully Close on Demand.Caused by Valve Operator Torque Switch Failing to Make Up.Switch Replaced

/03L-0:on 791115,while Securing Makeup & Purification Sys,Inside Containment Isolation Seal Return Valve Failed to Fully Close on Demand.Caused by Valve Operator Torque Switch Failing to Make Up.Switch Replaced

ML19211A252
Person / Time
Site:	Arkansas Nuclear
Issue date:	12/06/1979
From:	Shively C ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19211A250	List: 05000313/LER-1979-012-03, Leak Rate Testing of Reactor Bldg Purge Valves at Penetration V-1 Indicated Leak Rate in Excess of Tech Spec Limits.Caused by Maladjusted Valve Seat Shims.Leak Rate Test Performed 05000313/LER-1979-021, Forwards LER 79-021/03L-0 & Updated LER 79-012/03X-1 05000313/LER-1979-021-03, /03L-0:on 791115,while Securing Makeup & Purification Sys,Inside Containment Isolation Seal Return Valve Failed to Fully Close on Demand.Caused by Valve Operator Torque Switch Failing to Make Up.Switch Replaced
References
LER-79-021-03L-01, LER-79-21-3L-1, NUDOCS 7912170264
Download: ML19211A252 (1)

LER-1979-021, /03L-0:on 791115,while Securing Makeup & Purification Sys,Inside Containment Isolation Seal Return Valve Failed to Fully Close on Demand.Caused by Valve Operator Torque Switch Failing to Make Up.Switch Replaced

Event date:
Report date:
3131979021R03 - NRC Website

text

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NRC F ORM 366

. NUCLE AR REGUL ATORY COMMISSION (7 77)

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Lo_U]1 cold shutdown condition. the Inside Contninrent Isolation Seal Return I

loI.II Valve for RCP "B".

CV-1272, failed to fully close on demand.

The out-1 0

5 sido enntnin-one Tcnlarinn 9pn1 Rornrn Vnivo enc nrnven nnernh19 & n1,redl o 6 l in the closed nosition.

IFR's 50-713/78-010 nnd 78-002 were due to 1

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issufD NRC UST oNLY A ULj@otscas, TION l

NA 1 llllll;;;i Chris N. Shively 5d5/968-2519 AME OF PREPARER

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