ML20154A986

Provides Final Results of Revised Calculations Which Address Thermo-Lag Fire Barrier Seismic Capability,As Previously Committed to in Licensee to NRC

ML20154A986
Person / Time
Site:	Crane
Issue date:	09/28/1998
From:	Langenbach J GENERAL PUBLIC UTILITIES CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
1920-98-20426, NUDOCS 9810050063
Download: ML20154A986 (2)

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GPU Nuclear, Inc.

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Route 441 South NUCLEAR Post Office Box 480 Middletown, PA 17057 0480 Tel 717 944 7621 September 28, 1998 1920-98-20426 I

U.S. N,1 clear Regulatory Commission Attent'on: Document Control Desk Washt.g ; DC 20555 c

Gentlemen:

Subject:

Three Mile Island Nuclear Station, Unit 1 (TMI-1)

Operating License No. DPR-50 Docket No. 50-289 Thermo-Lag Fire Barrier Seismic Capability As previously committed in GPU Nuclear's letter to the NRC dated June 12,1998 (1920-98-20235),

this letter provides the final results of the revised calculations addressing Thermo-Lag fire barrier seismic capability.

i GPU Nuclear Calculation No. C-1302-814-E540-004, Revision 0, has been completed, design verified I

and issued on July 23,1998. The scope of this calculation includes Thermo-Lag assemblies attached with wire instead of steel bands, assemblies not mounted against a structural volume such as a tray, conduit, or electrical box, box configurations around valves, conduit "T" wraps, and miscellaneous assemblies around supports and equipment anchor plates. This calculation also evaluates some i

assemblies attached with steel bands not covered in GPU Nuclear Calculation No. C-1302-814-E540-003 previously completed and summanzed in the above referenced GPU Nuclear letter.

These two calculations constitute the structural evaluation ofinstalled Thermo-Lag configurations at TMI-1. The results ofboth calculations have confimled the seismic capability of these Thermo-Lag installations as originally described in GPU Nuclear's letter to the NRC dated October 31,1995 (C311-95-2456).

9810050063 980928 PDR ADOCK 05000289 p'M P

PDR

1920-98-20426-Page 2 If any additional information is needed, please contact Mr. David J. Distel, Corporate Regulatory Affairs, at (973) 316-7955.

Sincerely, V4 James W. Langenb Vice President and Director, TMI DJD cc:

Administrator, Region I - Hubert J. Miller l

TMI-l Senior Resident Inspector - Wayne L. Schmidt TMI-l Senior Project Manager - Timothy G. Colburn File 94032 l

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