ML20198B852

Withdraws 970522 Request for Exemption from Certain Requirements of 10CFR50,App R,Section Iii.G, Fire Protection of Safe Shutdown Capability. Request Was for Util Resolution of GL 92-08, Thermo-Lag 330-1...Barriers

ML20198B852
Person / Time
Site:	Peach Bottom
Issue date:	12/11/1998
From:	Geoffrey Edwards PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GL-92-08, GL-92-8, NUDOCS 9812210174
Download: ML20198B852 (1)

Text

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g 10CFR50.12 l

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PECO: NUCLEAR neme c-Nuclear Group Headquarters l

A UNIT Of /YCO ENacy 965 Chesterbrook Boulevard Wayne, PA 19087 5691 December 11,1998 1 Docket Nos. 50-277 50-278 License Nos. DPR-44 DPR 56 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

Subject:

Peach Bottom Atomic Power Station, Units 2 and 3 Withdrawal of Request for Exemption from Certain Requirements of 10 CFR 50, Appendix R, Section ill.G,

• Fire Protection of Safe Shutdown Capability *

Reference:

Letter PECO Energy to USNRC dated May 22,1997

Dear NRC Officials:

l On May 22,1997, PECO Energy Company (PECO Energy) submitted a request for an exemption from certain provisions of 10CFR 50 Appendix R, Section Ill.G, " Fire Protection of Safe Shutdown Capability." This exemption request is related to PECO Energy's resolution of Generic Letter (GL) 92-08, 'Thermo-Lag 330-1 Fire Barriers." Specifically, an exemption was requested from the automatic fire suppression requirement stipulated by Section Ill.G.2.c for thirteen (13) fire areas located in the Peach Bottom Atomic Power Station (PBAPS), Units 2 and 3 Turbine Building and Control Structure. In addition, affirmation of a previously granted exemption was requested for one (1) fire area in the Control Structure and two (2) fire areas in the Reactor Buildings. The NRC had previously granted this exemption in March 1985 based on the then known fire loading, which was impacted by the combustible loading of the installed Thermo-Lag fire baniers.

The resolution strategy of the Thermo-Lag issue has been modified such that it meets the requirements of 10CFR50, Appendix R and new exemptions are no longer necessary.

Furthermore, an engineering evaluation has verified that the assumptions used by the NRC in the previously granted exemption for the three (3) areas are still valid and that affirmation of the existing exemption is unnecessary. As stated in the May 22,1997 letter, the combustible loading in these three (3) areas, including the Thermo-Lag material, is low with an associated fire duration i of less than 45 minutes. Some of the Thermo-Lag in these three (3) areas is being removed or replaced with a non-combustible qualified fire barrier which reduces the combustible loading.

Therefore, this letter withdraws the above discussed exemption request and exemption affirmation request dated May 22,1997.

l If you have any questions or require additional information, please do not hesitate to contact us.

l Very truly yours, l G. D. Edwards Director- Licensing cc: H. J. Miller, Administrator, Region 1. USNRC A. C. McMurtray, USNRC Senior Resident inspector, PBAPS 9812210174 981211 I PDR ADOCK 05000277  ;

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