ML20247K264

Special Rept:On 980405,Unit 1 Svc Water Room Fire Detection Instrumentation Was Inoperable for Greater than 14 Days. Caused by Support of Mod Sys.Will Restore Instrumentation to Operable Status After Mod Welding Work Is Completed

ML20247K264
Person / Time
Site:	Calvert Cliffs
Issue date:	05/15/1998
From:	Katz P BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9805220051
Download: ML20247K264 (2)

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4 PETER E. KArz Baltimore Gas and Electric Company

, . Plant General Manager Calvert Cliffs Nuclear Power Plant Calvert Cliffs Nuclear Power Plant 1650 Calvert Cliffs Parkway Lusby, Maryland 20657 410 495-4101 May 15,1998 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION: Document Control Desk SUILIECT: Calvert Cliffs Nuclear Power Plant Unit No.1; Docket No. 50-317 Fire Detection Instrumentation Special Renort The attached special report is submitted in accoidance with Calvert Cliffs Unit 1 Technical Specification 3.3.3.7. The report concerns inoperable fire detection instrumentation. Specifically, the Unit 1 Service Water Room Fire Detection Instruments > ion has been inoperable for greater than 14 dtys.

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

Very truly yours, b

PEK/JMO/bjd Attachment cc: R. S. Fleishman, Esquire H. J. Miller, NRC J. E. Silberg, Esquire Resident inspector, NRC S. S. Bajwa, NRC lt. I. McLean, DNR A. W. Dromerick, NRC J. H. Walter, PSC

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4 ATTACHMENT (1)

UNIT 1 FIRE DETECTION INSTRUMENTATION SPECIAL REPORT This Special Report is required by Technical Specification 3.3.3.7, Action (b), because the Unit 1 Service l Water (SRW) Room Fire Detection Instrumentation was inoperable for greater than 14 days.

ACTION TAKEN l l

Technical Specification 3.3.3.7. Achn (a) was implemented because the Fire Detection Instrumentation l for the Unit 1 SRW Room was wmoved from service. This action requirer in part, that with one or more of the fire detection instrument (s) shown in Table 3.3-11 inoperable, ther "nin one hour establish a fire watch patrol to inspect the zone (s) with the inoperable instrument (s) at least once pet hour, or within one 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> and at least per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> thereafter, inspect the zone (s) with inoperable instruments and verify th: .t the Automatic Sprinkler System, including the water flow alarm and supervisory system, is OPERABLE by Channel Functional Test.

CAUSE OF INOPERABILITY Or \pril 5,1998, the Unit 1 SRW Room Fire Detection Instrumentation was removed from service to support a modification to the SRW system. The modification included welding activities. The smoke from welding sctivities can actuate the Fire Detection Instrumentation resulting in a hanging fire alarm in the Control Room. To prevent this alarm, an approved temporary alteration was installed that removed the Unit 1 SRW Room Fire Detection Instrumentation from service.

PLANS AND SCHEDULES FOR RESTORING TIIE INSTRUMENTATION TO OPERABLE STATUS The Unit 1 SRW Room Fire Detection Instrumentation will be restored to OPERABLE status after the modification welding work is completed. This work is currently planned to be completed prior to the Unit I startup. In accordance with Technical Specification 3.3.3.7, Action (a), compensatory actions will remain in effect until the Unit 1 SRW Room Fire Detection Instrumentation is restored to OPERABLE status.

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