PNO-III-87-021, on 870206,unit Shut Down to Repair Crack in Weld in Hydraulic Control Sys for Reactor Recirculation Sys Flow Control Valve 1B.Leak Identified on 870204.Repair Completed & Reactor Returned to Operation on 870209

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PNO-III-87-021:on 870206,unit Shut Down to Repair Crack in Weld in Hydraulic Control Sys for Reactor Recirculation Sys Flow Control Valve 1B.Leak Identified on 870204.Repair Completed & Reactor Returned to Operation on 870209
ML20210T126
Person / Time
Site: LaSalle Constellation icon.png
Issue date: 02/09/1987
From: Ring M, Warnick R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:
References
PNO-III-87-021, PNO-III-87-21, NUDOCS 8702180074
Download: ML20210T126 (1)


PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL.0CCURRENCE--PNO-III-87-21 Data February 9,1987 This preliminary notification constitutes EARLY notice of events of'P05'iBLE safe'ty or public interest significance. .The information is as initially received without M

v;rification or evaluation, and is basically all that is known by the Region III staff on this date.

Facility: Comonwealth Edison Company- Licensee Emergency Classification:

LaSalle Unit 1 Notification of an Unusual Event Marseilles, IL 61341 Alert Site Area Emergency Docket No. 50-373 General Emergency X Not Applicable

Subject:

SHUTDOWN TO REPAIR RECIRCULATION CONTROL SYSTEM On February 6, 1987, the licensee shut down Unit 1 to repair a crack in a weld in the hydraulic control system for the IB reactor recirculation system flow control valve. The leak had been identified February 4,1987.

The repair was completed, and the reactor returned to operation on February _9,1987. The licenste is planning increased monitoring for the IB recirculation pump because of-an abnormal noise detected previously in the pump.

The State of Illinois will be notified.

Rsgion 'III (Chicago) was informed of the shutdown on February 6,1987. This information is current as of 11 a.m., February 9,1987.

CONTACT:

%W M. A. Ring S{YbU R. F. Warnick FTS 388-5602 FTS 388-5575 DISTRIBUTION:

H. St. EDO NRR E/W Willste Mail: ADM:DMB Chairman Zech PA IE Com. Roberts NMSS D0T:Trans only ELD OIA RES Com. Asselstine AE00 NRC Ops Ctr Com. Bernthal //

Com. Carr SP /,'/9 Regional Offices ACRS SECY INP0/.'c2O NSAC /, M CA RIII Resident Offic PDR Lic?nsee: 1,' 1 (Corp. Office - Reactor Lic. Only) 3y 8702180074 870209 PDR I&E Region III D\I i.

PNO-III-87-021 PDR Rev. November 1986