ML20141D382

Special Rept:On 970319,Fire Detection Sys for Units 1 & 2 Rendered Inoperable.Caused by Unit Shutdown for Refueling Outage.Restored Fire Detection Sys to Operable Status at Conclusion of Unit 2 Refueling Outage

ML20141D382
Person / Time
Site:	Calvert Cliffs
Issue date:	04/28/1997
From:	Katz P BALTIMORE GAS & ELECTRIC CO.
To:	Miller H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
NUDOCS 9705200085
Download: ML20141D382 (3)

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m .v PETE3 E. KATz Baltimore Gas and Electric Company Plant General Manager Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Calvert Cliffs Nuclear Power Plant Lusby, Maryland 20657 410 495-i101 April 28,1997 U. S. Nuclear Regulatory Commission Region 1 475 Allendale Road King of Prussia, PA 19406 ATTENTION: Mr. II. J. Miller, Regional Administrator SUlkIECT: Calvert Cliffs Nuclear Power Plant Unit Nos.1 & 2; Docket Nos. 50 317 & 50-318 Fire Detection Instrumentation -- Special Report Technical Soccification 3.3.3.7. Action Statement b The attached special report is submitted in accordance with Calvert Cliffs Units i and 2 Technical Specification 3.3.3.7. The report concerns the inoperability of the Fire Detection System in the Calvert Cliffs Intake Structure for a period in excess of 14 days.

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

Very truly yours, 97052000a5 970428 PDR ADOCK 05000317 k //

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f cc: Document Control Desk, NRC Director, Project Directorate 1-1, NRC L R. S. Fleishman, Esquire Resident inspector, NRC I J. E. Silberg, Esquire R.1. McLean, DNR A. W. Dromerick, NRC J. H. Walter, PSC

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ATTACIIMENT (1)

FIRE DETECTION INSTRUMENTATION SPECIAL REPORT Baltimore Gas and Electric Company submits this Special Report concerning an inoperable Fire Detection System, as required by Technical Speci0 cation 3.3.3.7, Action Statement b. Specifically, the Fire Detection System in the Calvert Cliffs Intake Structure was inoperable for greater than 14 days, requiring issuance of a Special Report.

ACTION TAKEN On March 19,1997 the Fire Detection System for the Units 1 and 2 Intake Structure was rendered inoperable when Unit 2 was shutdown for a refueling outage. Units 1 and 2 Technical Speci0 cation 3.3.3.7, Action Statement a was entered. In accordance with this Action Statement, within one hour an hourly Orc watch was established for the area protected by the inoperable fire detection system.

CAUSE OF INOPERABILITY The Fire Detection System was disabled via temporary alteration to prevent spurious alarms to the Control Room. The Unit 2 shutdown caused temperature changes in the intake structure due to the loss of heat load from the equipment in the room. The Fire Detection System is sensitive to severe temperature changes.

l PLANS AND SCIIEDULES FOR RESTORING TIIE SYSTEM TO OPERABLE STATUS 1

The Fire Detection System will be restored to an operable status at the conclusion of the Unit 2 refueling l outage. In the interim, appropriate compensatory actions will continue in accordance with Technical l Speci0 cation 3.3.3.7, Action Statement a until the Gre detection equipment is restored to an operable status.

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