ML20044H140
| ML20044H140 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 05/28/1993 |
| From: | Colburn T Office of Nuclear Reactor Regulation |
| To: | Gipson D DETROIT EDISON CO. |
| References | |
| GL-92-08, GL-92-8, TAC-M85550, NUDOCS 9306070464 | |
| Download: ML20044H140 (4) | |
Text
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DocNtNo.50-341 May 28, 1993 Mr. Douglas R. Gipson Senior Vice President Nuclear Generation Detroit Edison Company 6400 North Dixie Highway Newport, Michigan 48166
Dear Mr. Gipson:
SUBJECT:
FERMI RESPONSE TO GENERIC LETTER 92-08, "THERMO-LAG 330-1 FIRE BARRIERS," (TAC NO. M85550)
By letter dated April 8, 1993, you provided a response to Generic Letter 92-08 for Fermi-2.
Your response stated that you could not confirm that the Thermo-Lag 330-1 fire barrier systems installed at Fermi-2 have been qualified by representative fire endurance tests and could not confirm that the fire barriers installed in the plant represent the materials, workmanship, methods of assembly, dimensions, and configurations of the qualification test assembly configurations and could not confirm acceptability of the ampacity derating test configurations relied upon for the ampacity derating factors used for raceways protected by Thermo-Lag. You further stated that appropriate actions to resolve fire barrier concerns are being developed through an industry program coordinated by NUMARC and you would apply the results of the industry program, when completed, to the Thermo-Lag 330-1 installations at Fermi-2.
Your response to GL 92-08, however, did not provide a schedule by which corrective actions would be completed.
We note that, as stated in your letter, you do not rely on the ampacity derating factors supplied by your-contractor for the two cable tray enclosures utilizing Thermo-Lag material at Fermi-2 and that you have performed design-calculations to show that these cable trays can still provide their safety-related electrical loads. Additionally, we understand that as an interim corrective action you have roving-hourly fire watches patrolling all eleven areas at Fermi-2 where Thermo-Lag is installed.
In your response to GL 92-08 you indicated that the actions necessary to restore (or confirm) the operability of these barriers will be based on the results of the NUMARC program. The staff expects that licensees referencing the NUMARC program, will review the results and, within 30 days after the completion of the program, inform the NRC of the actions necessary and the schedule for restoring the operability of these fire barriers. This includes those plant specific or unique fire barrier configurations that are not bound by the NUMARC program.
In accordance with the reporting requirements of GL 92-08, you are also requested to confirm in writing, completion of the i
corrective action.
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Mr. Douglas R. Gipson May 28, 1993 l
The information-requested by this letter is within the scope of the overall burden estimated in Generic Letter 92-08, which was an average of 300 person-i hours for.each addressee's response. This request is covered by Office of Management and Budget Clearance Number 3150-0011, which expires June 30, 1994.
I Sincerely 4L $%
q or Timothy G. Colburn, Project Manager.
Project Directorate 111-1 i
l Division of Reactor Projects - III/IV/V Office of Nuclear Reactor Regulation l
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Mr. Douglas R. Gipson
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The information requested by this letter is within the~ scope of the overall burden estimated in Generic Letter 92-08, which was an average of 300 person-hours for each addressee's response. This request is covered by Office of Management and Budget Clearance Number 3150-0011, which expires June 30, 1994.
Sincerely,
/31 Timothy G. Colburn, Project Manager Project' Directorate III-l Division of Reactor Projects - III/IV/V Office of Nuclear Reactor Regulation DOCUMENT NAME:
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- SEE PREVIOUS CONCURRENCE DISTRIBUTION:
(DocketxFile NRC & LOCAL PDRs PDIII Reading File PDIII-1 Plant J. Roe J. Zwolinski W. Dean T. Colburn M. Shuttleworth A. Masciantonio C. McCracken C. Berlinger 0GC ACRS(10)
E. Greenman, RIII OFFICE LA:PDIII-1*
LPM:Thermo-Lag
- iPM:PDIII-l BC:SPLB*
BC:EELB* A(A)D:PDIII-1 NAME MShuttleworth AMasciantonio hColburn CMcCracken CBerlingerbDean DATE 5/7/93 5/13/93 5 /Z8/93 5/20/93 5/21/93
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COPY YES/NO YES/N0 YES/N0 YES/NO YES/N0 YES/NO
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'n" Mr. Douglas R. Gipson Fermi-2 Detroit Edison Company cc:
John Flynn, Esquire Senior Attorney Detroft Edison Company 2000 Second Avenue Detroit, Michigan 48226 Nuclear Facilities-and Environmental Monitorina Section Office Division of Radiological Health Department of.Public Health-3423 N. Logan Street P. 0. Box 30195 Lansing, Michigan 48909 Mr. Wayne Kropp U.S. Nuclear Regulatory Commission Resident Inspector. Office 6450 W. Dixie Highway Newport, Michigan 48166 Monroe County Office of Civil Preparedness 963 South Raisinville Monroe, Michigan 48161 Regional Administrator, Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 Mr. William E. Miller Director - Nuclear Licensing Detroit Edison Company Fermi-2 6400 North Dixie Highway Newport, Michigan 48166
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