ML19211A252

LER 79-021/03L-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

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: ML19211A249 ML19211A252 ML19211A255
References
LER-79-021-03L-01, LER-79-21-3L-1, NUDOCS 7912170264
Download: ML19211A252 (1)

Text

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NRC F ORM 366 . NUCLE AR REGUL ATORY COMMISSION (7 77)

LICENSEE EVENT REPORT EXHIBIT A CONTROL 8 LOCK: l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 l l l \ \ 6lh 7

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74 HE,OR T D ATE So 3 60 Si DOCKET NuM8Ea PS EVENT OESCRIPTION AND PROSAGLE CONSEQUENCES h ITTTlI While securing rho Makeun & Puri fienrinn 9vsrom. with the unit in the I 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 0 2 I similar failures of limitorcue type SMB torcue switch failures. Report-o . Inhin nnr T_9 6 1?_t? h I

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AME OF PREPARER Chris N. Shively , u g, 5d5/968-2519 7 91217 0ZIY