PNO-III-89-035, on 890516,unit Shut Down to Repair Hydrogen Leak in Main Generator Stator Water Cooling Sys.Unit Will Be Shut Down for 9 Days for Repairs & Other Maint Activities

PNO-III-89-035:on 890516,unit Shut Down to Repair Hydrogen Leak in Main Generator Stator Water Cooling Sys.Unit Will Be Shut Down for 9 Days for Repairs & Other Maint Activities

ML20247C940
Person / Time
Site:	Byron
Issue date:	05/17/1989
From:	Hinds J, Mckenna E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:
References
PNO-III-89-035, PNO-III-89-35, NUDOCS 8905250095
Download: ML20247C940 (1)

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l PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PN0-III-89-35 Date May 17, 1989.

T>dD This pts 11minary notification constitutes EARLY notice of events of POSSIBLE /t  !

safety or'public' interest significance. The information is as initially F  :

r4ceived without verification or evaluation, and is basically all that is

-known by the Region ~III staff on this date.  !

Facility: Commonwealth Edison Co. Licensee Emergency Byron Unit 2 Classification:  ;

. Byron,-IL 61010 Unusual Event l Alert 4 Docket No. 50-455 Site Area Emergency General Emergency  ;

X Not Applicable ,

Subject:

SHUTDOWN TO REPAIR HYDR 0 GEN LEAK

'At 12 noon (CDT), May 16, 1989, the licensee began a controlled shutdown of Unit 2 after l

detecting a hydrogen leak in the main generator stator water cooling system on fiay 15.  !

'The Unit is expected to be down about nine days for repairs and other maintenance activities.

Region III (Chicago) is monitoring the licensee's course of action, i

The State of Illinois will be notified. I R::gion III was first informed of the planned shu+,down at 3 p.m. (CDT), May 16, 1989. This information is current as of 9:30 a.m. (CDT), May 17, 1989. j b7G CONTACT: . Hinds E. McKenna  !

FTS 388-5575 FTS 388-5603 i

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DISTRIBUTION:

WHITE FLINT NORTH'1 MNBB REGIONS FAX T0:

Chairman Zech CA XE01 0 RI INPO 10:40 1 Comm. Roberts OGC ARM RII NSAC @ o5 Comm. Carr 01 OIA RIV Licensee w qs, Comm. Rogers EDO RV NRC Ops Ctr m s Comm. Curtiss NRR NL MAIL T0:

'SECY NMSS RES DCS (Orig.) PDR (8/634-3343)30 M

.GPA/SLITP/PA ACRS DOT (Trans. Only)

'ASLAP Rev. 03/01/89 g52g95890517 g; [

PNO-III-69-035 PDC

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