PNO-III-86-012, on 860211,unidentified Primary Sys Leakage Slightly Above Tech Spec Limit.Leakage Associated W/Leakage Past Valve Seats in Portions of Reactor Depressurization Sys.Maint Outage Planned for 860215 to Correct Leakage

PNO-III-86-012:on 860211,unidentified Primary Sys Leakage Slightly Above Tech Spec Limit.Leakage Associated W/Leakage Past Valve Seats in Portions of Reactor Depressurization Sys.Maint Outage Planned for 860215 to Correct Leakage

ML20137S803
Person / Time
Site:	Big Rock Point File:Consumers Energy icon.png
Issue date:	02/11/1986
From:	Boyd D, Chrissotimos N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:
References
PNO-III-86-012, PNO-III-86-12, NUDOCS 8602180121
Download: ML20137S803 (1)

PRELIMINARY NOTIFICATION OF EVENT OR: UNUSUAL OCCURRENCE--PNO-III-86-12 Date February 11, 1986 bm8 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without v rification or evaluation, and is basically all that is known by the Region III staff on this date. y-Q Facility: Consumers Power Company. Licensee Emergency Classification:

Big Rock Point Nuclear Plant XX Notification of an Unusual. Event Charlevoix, MI 49720 Alert Site Area Emergency Docket No: 50-155 General Emergency Not Applicable

Subject:

SHUTDOWN TO REPAIR VALVE LEAKAGE At 6:18 a.m February 11, 1986, the licensee determined that the unidentified primary system leakage was slightly above the Technical Specification limit (1.126 gallons per minute compared to the limit of 1.0 gallons par minute).

As rcquired by the Technical Specifications, the licensee began a controlled shutdown and an Unusual Event was declared under the licensee's emergency plan.

The leakage is associated-with leakage past valve seats in portions of the Reactor Depr;ssurization Sytem. The licensee had previously planned a maintenance outag2 for the weekend of February 15, 1986, to correct known leakage in this system. The repairs are expected to require several days to complete.

The'R:sident Inspector will monitor the licensee's activities.

The State of Michigan will De informed.

Regicn III (Chicago) was notified of this matter by the Headquarters Duty Officer about 7:15 a.m., February 11, 1986. This information is current as of 9 a.m., February 11, 1986.

I CONTACT: D. Boyd N. s tYmos FTS 388-5546 S 388-5716 DISTRIBUTION:

H.-St. ED0 NRR E/W Willste Mail: ADM:DMB Chairman Palladino PA IE NMSS D0T:Trans only Comm.'Zech ELD OIA RES Comm. Bernthal AE0D Comm. Roberts

. Com. Asselstine SP P @ ' Regional Offices

'ACRS SECY INP0 P* NSAC P;#

CA RIII Resident Office PDR Licensee: I;Io (Corp. Office-ReactorLic.Only)

PD Region III PNO-III-86-012 PDR Rev. November 1985 TB3Y