ML20247K264
| 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 v J,' ()
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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 Water (SRW) Room Fire Detection Instrumentation was inoperable for greater than 14 days.
l 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
hour 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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