ML18094A616
| ML18094A616 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 08/15/1989 |
| From: | Butler W Office of Nuclear Reactor Regulation |
| To: | Public Service Enterprise Group |
| Shared Package | |
| ML18094A615 | List: |
| References | |
| NUDOCS 8908170527 | |
| Download: ML18094A616 (2) | |
Text
7590-01 UNITED STATES NUCLEAR REGULATORY COMMISSION PUBLIC SERVICE ELECTRIC & GAS COMPANY DOCKET NOS. 50-272 AND 50-311 CORRECTION 54 FR 31270 published on July 27, 1989 contained exemptions to 10 CFR Part 50, Appendix R related to the Salem Generating Station, Units 1 and 2.
The word "smoke" on page 31275, Section 9.3, column 2 on line 2 should be corrected to read "fire."
Dated at Rockville, Maryland, this 15th day of August
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0!5000:272 F'DC FOR THE NUCLEAR REGULATORY COMMISSION j)a/1;7?~
Walter Butler, Director Project Directorate I-2 Division of Reactor Projects I/II Office of Nuclear Reactor Regulation 1989.
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ENCLOSURE 2 10 PI PE 'TUNNEL ELEVATION 84 FEET (AREA 12 FA-PT-84) 10.1 Exemption Requested The licensee requested approval of an exemption from the technical requirements of Section III.G.2 of Appendix R to 10 CFR 50 to the extent that it requires that redundant shutdown systems be separated by at least 20 feet free of inter-vening combustibles and be protected by automatic fire detection and suppression systems. Specifically, redundant systems are separated by less than 20 feet and the tunnel is not protected by an automatic fire suppression system.
10.2 Discussion The physical description of this area, including perimeter construction, fire hazards, existing fire protection and configuration of safe shutdown systems is as described in Enclosure 1 to the licensee's July 15, 1988 letter.
To enhance fire safety the licensee cormnitted to install a fire detection system throughout the pipe tunnel which will transmit an alarm automatically to the control room.
The licensee justified the exemption on the bases of the limited fire loading, the unaccessibility of the tunnel and the proposed modification.
10.3 Evaluation The technical requirements of Section III.G.2 are not met in this area because redundant shutdown divisions are separated by less than 20 feet horizontal dis-tance and the tunnel is not protected by an automatic fire suppression system.
The fire loading in the tunnel is minimal.
If all of the combustibles ignited and were consumed the resulting fire would be about 7 minutes in duration as determined from the ASTM E-119 Time Temperature Curve.
Because access to the area is limited to three hatchways the potential for accumulation of significant quantities of transient combustibles or ignition sources is considered remote.
Nevertheless, the staff was concerned that if a fire did occur, it would not be detected in sufficient time for the fire brigade to intervene to limit damage.
The licensee's corrmitment to install a* fire detection system in the area has eliminated that concern.
The staff concludes that with the addition of the detection system, the limited fire hazard in the area and the restricted access, there is reasonable assurance that at least one shutdown division can be maintained free of fire damage.
10.4 Conclusion Based on its evaluation, the staff concludes that the licensee's alternate fire protection configuration provides an equivalent level of safety to that achieved by compliance with Appendix R.
Therefore the licensee's request for exemption from the requirement of Section III.G.2 for 20 feet of separation between redun-dant shutdown systems and an automatic fire suppression system in the pipe tunnel is granted.
10-1
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