ML19351G415

Safety Evaluation Supporting Fire Detection Signaling Sys. More Info Re Steam Driven Emergency Feedwater Pump Required

ML19351G415
Person / Time
Site:	Crystal River
Issue date:	01/22/1981
From:	Office of Nuclear Reactor Regulation
To:
Shared Package
ML19351G411	List: ML19351G410 ML19351G415
References
NUDOCS 8102230656
Download: ML19351G415 (3)

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UNITED STATES

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NUCLEAR REGULATORY COMMISSION y

E WASHINGTON, D. C 20555

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SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION FIRE PROTECTION REVIEW CRYSTAL RIVER UNIT NO. 3 FLORIDA POWER CORPORATION DOCKET NO. 50-302 Fire Detection Signaling System, Section 3.2 In the SER, it was our concern that emergency power was not supplied to those portions of the fire detection and signaling systems serving areas containing safety-related equipment.

Sy letter dated December 11, 1980, the licensee verified that the fire l

detection systems received power from the emergency. diesel generators upon loss of off-site power.

In addition, the licensee verified that the follow-ing systems are powered from lighting panels which upon loss of off-site power, the two emergency diesel generators provide power:

(1) Products of Combustion Cabinet - Office Building (2) Products of Combustion Cabinet - Plant (3) Halon System (4) Cable Spreading Room Fans (5) Cardox System (5) Fire Service Control Panel Based on the licensee's verification that the fire detection systems receive power from the emergency diesel generators upon loss of off-site power, we conclude that the emergency power for the detection systems meets Section E.l(d) of Appendix A to BTP ASB 9.5-1 and, therefore, is acceptable.

I Steam Driven Emergency Feedwater Pumo. Section 3.18 In the SER, it was.our concern that a single, unmitigated fire could affect both the motor driven and the steam driven emergency feedwater pumps. At least one emergency feedwater pump is required for safe shutdown.

By letter dated December 11, 1980, the licensee provided additional informa-tion regarding the proposed fire protection modifications for this area.

The licensee indicated that the circuits.for the motor driven pump, which are located in the vicinity of the steam driven pump, are encased in conduit and that fire barriers will be installed to keep an exposure fire from impinging directly on the conduit. The conduit will not provide protection in the l

event of an exposure fire. The licensee has not demonstrated that the pro-posed fire barriers are adequate to maintain the integrity of the circuits 1

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for at least one hour in the event of a fire and, therefore, the modification is not acceptable.

The licensee has proposed to build a UL approved one-hour fire barrier between certain notor-operated valves but has not referenced the specific UL design and has not indicated which valves will be protected.

The licensee must provide this information for us to conplete our evaluation of the adequacy of the barriers.

In addition, the licensee has not provided an autor,atic suppression system as required by Section III.G of Appendix R to 10 CFR Part 50.

This suppression syste.; must be provided to meet Appendix R.

Dated: January 22, 1981 I

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FIRE PROTECTION REVI'EW STATUS CRYSTAL RIVER UtlIT T10. 3 i

i DOCKET fl0. 50-302

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Item Description of Unresolved Issues 1

3.18 Steam Driven Emergency Feedwater Pump 3.25 +

3.27 3.28

$ Evaluation and Corrective Action for Fire i

3.29 C

4 onsequences in Certain Areas 3.30

3. 31.

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