PNO-III-87-114, on 871120,licensee Elected to Shutdown from Full Power to Cold Shutdown Conditions to Perform Top Assembly Replacement of Reactor Depressurization Sys Valves Exhibiting Excessive Polot Valve Leakage Since 871114

PNO-III-87-114:on 871120,licensee Elected to Shutdown from Full Power to Cold Shutdown Conditions to Perform Top Assembly Replacement of Reactor Depressurization Sys Valves Exhibiting Excessive Polot Valve Leakage Since 871114

ML20212E277
Person / Time
Site:	Big Rock Point File:Consumers Energy icon.png
Issue date:	11/20/1987
From:	Guldemond W, Jackiw N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:
References
PNO-III-87-141, NUDOCS 9711030127
Download: ML20212E277 (1)

l Ae)&u. by \

PRELIMINARY' NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-III-87-141 Date November 20, 1987 This' preliminary notification constitut::s EARLY notice of evsnts of POSSIBLE safety

,/cr_.erification public interest significance.

or evaluation, and isThe information basically all thai.isisas initially known by received the Region without III 4 taff on this date.

Facility: Consumers Power C y any Licensee Emergency Classification:

Big Rock Point Nuclear Plant Notification of an Unusual Event Charlevoix, Michigan Alert

.. Site Area Emergency Docket No. 50-155 General Emergency X ,Not Applicable

Subject:

SHUTDOWN TO REPAIR LEAKING VALVES At11a.m.(CST), November 20, 1987 ti.e licensee elected to shutdown from full power to cold shutdown conditions to perfonn top assembly replacement on Reactor Depressurization System valves exhibiting excessive pilot valve leakage since startup on Novemoer 14. Repairs performed during the forced outage November 9-14 were not fully effective in reducing tiie plant's total unidentified leakage. Lenk rate during the period November 14-20 has risen steadily from approximately 0.642 gpm to 0.752 gpm. The administrative limit is 0.8 gpm and the Tech Spec ii. nit -is 1.0-gpm. The licensee is expected to commence shutdown during the afternoon of November 20, perform repairs over the weekend of November 21-22, and return.to service November 23. No other major maintenance items are planned.

The Senior Resident is on sf ce and monitoring the licensee's course of action.

The State of Michigan will-be notified, fegionIII(Chicago)wasnotifiedofthisevent'at10a.m.(CST), November 20,'1987.

W This information-is current as of 1 p.m. (CST' November 20, 1987.

CONTACT: N. Jackiw W. Guldemand FTS 388-5697 FTS 388-5574 C/R Distribution: Chm, Cmrs, S GC, CA, M, Historian, SECY, Records. J DISTRIBUTION: ,hy

-H. St. NMBB Phillips E/W Willste 3

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Chairman Zech AT65 NRR UIX NMSS -

Com. Roberts Com. Bernthal ARM E00 AirRights OI Mail To: '} L Com. Carr PA SLITP DCS (Original)

Com. Rogers OGC DOT (Trans. Only)

SECY OGC-H' FAX TO: Nicholson Lane Regions CA INPO RES Pegion I GPA NSAC Regien II

' ACRS Licensee Region IV CPUp Resident Inspector Region V

, HQS. Operations Officer

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.:y g Region III Rev. November 1987 9711030127 871120 PDR I&E PNO-III-87-141 PDR ,

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