ML20035D505
| ML20035D505 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 03/31/1993 |
| From: | Feigenbaum T NORTH ATLANTIC ENERGY SERVICE CORP. (NAESCO) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GL-92-08, GL-92-8, IEB-92-001, IEB-92-1, NYN-93046, TAC-M85603, NUDOCS 9304130290 | |
| Download: ML20035D505 (3) | |
Text
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4 eab ok NH 03874 Telephone (603)474 9521 j[h
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Facsimile (603)474 2987 Energy Service Corporation Ted C. Feigenbaum Senior Vice President and Chief Nuclear Off;cer NYN-93046 March 31,1993 United States Nuclear Regulatory Commission Washington, D.C. 20555 Attention:
Document Control Desk
References:
(a)
Facility Operating License No. NPF-86, Docket No. 50-443 (b)
USNRC Generic Letter No. 92-08, dated December 17, 1992, "THERMO-LAG FIRE BARRIERS" (c)
North Atlantic Letter NYN-92101, dated July 20,1992, " Response to NRC Bulletin No. 92-01"
Subject:
Response to Generic Letter 92-08 (TAC No. 85603)
G e n t.'a m e n:
NRC Bulletin 92-01 discussed fire endurance testing failures associated with Thermo-Lag 330 fire barrier systems manufactured by Thermal Science, Incorporated (TSI).
Licensees of operating reactors using Thermo-Lag fire barriers were requested to take specific actions and provide a written response. The North Atlantic response to Bulletin 92-01 was submitted in Reference (c). NRC Generic Letter (GL) 92-08 requested additional information regarding Thermo-Lag 330-1 fire barrier systems. This letter provides the information for Seabrook Station requested by GL 92-08.
As reported in Reference (c), Thermo-Lag 330 fire barrier systems are not utilized at Seabrook Station. Selected, redundant, safe-shutdown circuits at Seabrook Station, which are routed through common fire areas, are enclosed in conduit and wrapped with a one-hour fire-rated wrap system. The conduit fire wrap system used at Seabrook Station was supplied by 3M Fire Protection Products. Inside Containment, stainless steel faced mat and stainless steel foil tape are used. Elsewhere, aluminum faced mat and aluminum foil tape are used.
The smallest fire-rated wrapped conduit at Seabrook Station is one inch in diameter Cable trays do not contain cables of redundant circuits requiring the protection of a fire barrier system. Therefore, cable trays at Seabrook Station are not wrapped, North Atlantic evaluated the applicability to Seabrook Station of the technical concerns described in GL 92-08. This evaluation determined that the conduit fire wrap system installed at Seabrook Station complies with NRC requirements and provides a reliable, one-hour fire-rated barrier as required by 10CFR50, Appendix R. The evaluation I.3OOdC a member of the Northeast Utilities system 9304130290 930331 PDR ADOCK 05000443 F
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' United States Regulatory Commission March 31,1993 1
Attention:
Document Control Desk Page two concluded that the technical concerns described in GL 92-08 are not applicable to the fire barrier system installed at Seabrook Station.
Additional information supporting the determination and conclusion of this evaluation is available on-site.
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We trust that the above information provides the requested response to GL 92-08 for Seabrook Station. Should you have any questions on this matter, please contact Mr. James j
M. Peschel, Regulatory Compliance Manager at (603) 474-9521 extension 3772.
Very truly yours, MW Ted C. Feigenbaum
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TCF:GK i
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STATE OF NEW H AMPSHIRE Rockingham, ss.
March 31,1993 Then personally appeared before me, the above-named Ted C. Feigenbaum, being duly sworn, did state that he is Senior Vice President and Chief Nuclear Officer of the North i
Atlantic Energy Service Corporation, that he is duly authorized to execute and file the foregoing information in the name and on the behalf of North Atlantic Energy Service Corporation and that the statements therein are true to the best of his knowledge and belief.
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TracM. DeCredico, Notary Public My Commission Expires: October 3,1995 l
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l United States Nuclear Regulatory Commission March 31,1993 Attention:
Document Control Desk Page two l
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cc:
Mr. Thomas T. Martin Regional Administrator U. S. Nuclear Regulatory Commission i
Region I s
475 Allendale Road j
King of Prussia, PA 19406 Mr. Albert W. De Agazio, Sr. Project Manager l
Project Directorate 1-4 Division of Reactor Projects - I/II
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Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555 i
Mr. Noel Dudley NRC Senior Resident inspector
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P.O. Box 1149 Seabrook, NH 03874 l
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