ML20045C321
| ML20045C321 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 06/16/1993 |
| From: | Wharton L Office of Nuclear Reactor Regulation |
| To: | Schnell D UNION ELECTRIC CO. |
| References | |
| GL-92-08, GL-92-8, TAC-M85530, NUDOCS 9306220358 | |
| Download: ML20045C321 (4) | |
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UNITED STATES r
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June 16, 1993 Docket No.
50-483 Mr. Donald F. Schnell Senior Vice President - Nuclear Union Electric Company Post Office Box 149 St. Louis, Missouri 63166
Dear Mr. Schnell:
SUBJECT:
CALLAWAY - RESPONSE TO GENERIC LETTER 92-08, "THERMO-LAG 330-1 FIRE BARRIERS" (TAC N0. M85530)
By letter dated April 14, 1993, you provided a response to Generic Letter (GL) 92-08 for the Callaway Nuclear Plant.
Your response states that the Thermo-Lag fire barriers installed at Callaway were qualified by Thermal Science, Inc. (vendor) based on their understanding of the NRC guidance in existence at the time of installation and that the fire barrier configurations installed at the plant are consistent with the qualification test assembly configurations.
Your response also states that deviations from the tested configuration have not been evaluated.
Although Thermo-Lag barriers were evaluated and may have been considered qualified, the results of recent tests and inspections indicate that further actions are now necessary to address fire endurance and ampacity derating of Thermo-Lag barriers.
Your response states that appropriate = actions to resolve these 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 Callaway. Compensatory measures for inoperable barriers are in place and will' remain in place-until the fire barriers can be declared operable.
Your response to GL 92-08 stated that a schedule by which corrective actions would be completed will parallel the specific schedules provided to the NRC by NUMARC.
In your response to GL 92-08 you indicated that the actions necessary to restore 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 af ter the completion of the program, inform the NRC of the actions necessary and the schedule for restoring the operability of these fire barriers including 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 to confirm in writing, completion of the corrective actions.
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June 16, 1993 Mr. Donald F. Schnell The information requested by this letter is within the scope of the overall burden estimate 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 Ncmber 2150-0011, which expires June 30, 1994.
Sincerely, 4
L. Raynard Wharton, Project Manager Project Directorate III-3 Division of Reactor Projects - III/IV/V Office of Nuclear Reactor Regulation cc: See next page
Mr. Donald F. Schnell J m 16, 1993
' The information requested by this letter is within the scope of the overall burden estimate 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, rSt L. Raynard Wharton, Project Manager Project Directorate III-3 Division of Reactor Projects - III/IV/V Office of Nuclear Reactor Regulation cc:.See next page DISTRIBUTION Docket File NRC & Local PDRs PDIII-3 Reading
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3 Callaway Plant Union Electric Company Unit No. I cc:
Cermak Fletcher Associates Mr. Bart D. Withers 18225 Flower Hill Way #A President and Chief Gaithersburg, Maryland 20879-5334 Executive Officer Wolf Creek Nuclear Operating Corporation Gerald Charnoff, Esq.
P.O. Box 411-Thomas A. Baxter, Esq.
Burlington, Kansas 66839 Shaw, Pittman, Potts & Trowbridge 2300 N. Street, N.W.
Mr. Dan I. Bolef, President Washington, D.C.
20037 Kay Drey, Representative Board of Directors Coalition Mr. S. E. Sampson for the Environment Supervising Engineer, 6267 Delmar Boulevard Site Licensing University City, Missouri 65130 Union Electric Company Post Office Box 620 Fulton, Missouri 65251 U.S. Nuclear Regulatory Commission Resident Inspectors Office RR#1 Steedman, Missouri 65077 Mr. Alan C. Passwater, Manager Licensing and Fuels Union Electric Company Post.0ffice Box 149 St. Louis, Missouri 63166
- t Manager - Electric Department Missouri Public Service Commission 301 W. High Post Office Box 360 Jefferson City, Missouri 65102 Regional Administrator U.S. NRC, Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Mr. Ronald A. Kucera, Deputy Director Department of Natural Resources P.O. Box 176 Jefferson City, Missouri 65102 Mr. Donald F. Schnell Senior Vice President - Nuclear Union Electric Company Post Office 39/ 149 St. Louis. N'<2)uri 63166
.