3F0187-07, Special Rept 86-01:on 861223,during Startup from Mode 5,unit Entered Mode 4 W/Noble Gas Activity Monitor & Fuel Handling Bldg Area Exhaust Duct Inoperable.Caused by Poor Response of Installed Check Source.Instrument Recalibr

Special Rept 86-01:on 861223,during Startup from Mode 5,unit Entered Mode 4 W/Noble Gas Activity Monitor & Fuel Handling Bldg Area Exhaust Duct Inoperable.Caused by Poor Response of Installed Check Source.Instrument Recalibr

ML20207M875
Person / Time
Site:	Crystal River
Issue date:	01/09/1987
From:	Eric Simpson FLORIDA POWER CORP.
To:	NRC OFFICE OF ADMINISTRATION (ADM)
References
3F0187-07, 3F187-7, 86-01, 86-1, NUDOCS 8701130318
Download: ML20207M875 (2)

Text

O' Power C O i; P O R A T t () N January 9,1987 3F0187-07 Document Control Desk U. S. Nuclear Regulatory Commission Washington, DC 20555

Subject:

Crystal River Unit 3 Docket No. 50-302 Operating License No. DPR-72 Special Report 86-01

Dear Sir:

Enclosed is Special Report 86-01 which is submitted in accordance wi th Technical Specifications 3.3.3.9 and 6.9.2.

Sincerely.

1 e f/)) 4tfh E. C. Simpson Director, Nuclear Operations Engineering and Licensing AEF/feb Attachment xc: Dr. J. Nelson Grace Regional Administrator, Region II Mr. T. F. Stetka Resident Inspector e701130318 870109 PDR ADOCK 05000302 S PDR [,

Ii GENERAL OFFICE: 3201 Thirty-fourth Street South

• P.O. Box 14042 + St. Petersburg, Florida 33733 + (813) 866-5151 A Florida Progress Company

/

SPECIAL REPORT 86-01 At 0610 on December 23, 1986 during a startup from Mode 5 (Cold Shutdown)

Crystal River Unit 3 entered Mode 4 (Hot Shutdown) with the mid-range noble gas activity monitor for the auxiliary building and fuel handling building area exhaust duct (RM-A2) inoperable. When Mode 4 was entered, Technical

. Specification 3.3.3.9 became applicable and the action statement was entered.

Repair activities were postponed due to main feedwater pump controller problems during plant start-up activities. This resulted in the monitor being out of service for greater than seven days.

The inoperability is attributed to the poor response characteristics of the installed check source. This source may fail to provide repeatable or consistent count data due to geometry associated with the variable location of the source in relation to the detector.

The instrument was recalibrated and the source check was performed satisfactorly on December 31, 1986.

This report is submitted in accordance with Technical Specifications 3.3.3.9 and 6.9.2.

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