ML20141D405

Special Rept:On 970327,fire Detection Sys Removed from Svc to Support Mod to Purge Air Sys in Unit 2 27-foot Elevation & 5-foot Elevation East Piping Penetration Rooms During Refueling Outage.Temporary Alteration Installed

ML20141D405
Person / Time
Site:	Calvert Cliffs
Issue date:	05/08/1997
From:	Katz P BALTIMORE GAS & ELECTRIC CO.
To:	Miller H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
NUDOCS 9705200095
Download: ML20141D405 (3)

Text

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. PETEu E. KATz Baltimore G:s and Electric Comp _ny i Plant General Manager Calvert Cliffs Nuclear Power Plant l i

Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, Maryland 20657 410 495 4101 May 8,1997 U. S. Nuclear Regulatory Commission Region 1 475 Allendale Road King of Prussia, PA 19406 ATTENTION: Mr.11. J. Miller, Regional Administrator SUIMECT: Calvert Cliffs Nuclear Power Plant Unit No. 2; Docket No. 50-318 Fire Detection Instrumentation -- Soccial Report The attached Special Report is submitted in accordance with Calvert Cliffs Unit 2 Technical Specification 3.3.3.7. The Special Report concerns the inoperability of the Fire Detection System for the ,

Unit 2 27-foot Elevation and 5-foot Elevation East Piping Penetration Rooms for a period in excess of j

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14 days.

Should you have questions regarding this matter, we will be pleased to discuss them with you.

l l Very truly yours, l

f a. --P ) OL, n  ;

PEK/CDS/bjd O l

Attachment ec: Document Control Desk, NRC Direemr, Project Directorate I-1, NRC

'kI R. S. Fleishman, Esquire Resident inspector, NRC J. E. Silberg, Esquire R.1. McLean, DNR A. W. Dromerick, NRC J. II. Walter, PSC l

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ATTACHMENT (1) i . . UNIT _LflRE DETECILON INSTRUMENTATION - SPECIALREPORT Baltimore Gas and Electric Company submits this Special Report concerning an inoperable Fire Detection System, as required by Technical Specification 3.3.3.7, Action Statement b. Specifically, the Fire Detection System for the Unit 2 27-foot Elevation and 5-foot Elevation East Piping Penetration Rooms was inoperable for greater than 14 days, requiring issuance of a Special Report.

ACTION TAKEN After the Fire Detection System for the Unit 2 27-foot Elevation and 5-foot Elevation East Piping Penetration Rooms was removed from service, Unit 2 Technical Specification 3.3.3.7, Action Statement a was entered and implemented. This Action Statement, requires that within one hour an hourly fire watch patrol be established in the affected fire zone; or that the automatic sprinkler system in the fire zone, including the water flow alarm and supervisory system, is verified operable at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> for the area protected by the inoperable fire detection system.

CAUSE OF INOPERABILITY On March 27,1997, the Fire Detection System was removed from service to support a modification to the Purge Air System in the Unit 2 27-foot Elevation and 5-foot Elevation East Piping Penetration Rooms during the Unit 2 refueling outage. The modification included welding activities. The smoke from welding activities can actuate the Fire Detection System causing a hanging fire alarm in the Control Room. To prevent this alarm, a temporary alteration was installed that removed the Fire Detection System from service.

PLANS AND SCIIEDULES FOR RESTORING TIIE SYSTEM TO OPERABLE STATUS The Fire Detection System in the Unit 2 27-foot Elevation and 5-foot Elevation East Piping Penetration Rooms was restored to an operable status on April 24,1997.

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