ML20044H106

Ack Receipt of Responding to GL 92-08 Re Thermo- Lag 330-1 Fire Barriers.Response Did Not Provide Schedule by Which Corrective Actions Would Be Completed.Util Should Confirm in Writing,Completion of Corrective Actions

ML20044H106
Person / Time
Site:	Haddam Neck, Millstone  File:Connecticut Yankee Atomic Power Co icon.png
Issue date:	06/01/1993
From:	Stolz J Office of Nuclear Reactor Regulation
To:	Opeka J CONNECTICUT YANKEE ATOMIC POWER CO., NORTHEAST NUCLEAR ENERGY CO.
References
GL-92-08, GL-92-8, TAC-M85555, TAC-M85570, TAC-M85571, TAC-M85572, NUDOCS 9306070403
Download: ML20044H106 (4)

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WASHINGTON, D.C. 2055M001 Docket Nos. 50-213, 50-245 50-336, 50-423 Mr. John F. Opeka Executive Vice President, Nuclear Connecticut Yankee Atomic Power Company Northeast Nuclear Energy Company Post Office Box 270 Hartford, Connecticut 06141-0270

SUBJECT:

RESPONSE TO GENERIC LETTER 92-08, "THERMO-LAG 330-1 FIRE BARRIERS,"

(TAC NOS. M85555, M85570, M85571, M85572)

By letter dated April 16, 1993, Connecticut Yankee Atomic Power Company (CYAPC0) on behalf of the Haddam Neck Plant and Northeast Nuclear Energy Company (NNECO) on behalf of Millstone Nuclear Power Station, Units 1, 2 and 3, provided a response to Generic Letter (GL) 92-08.

Your response states that: (1) neither CYAPC0 nor NNEC0 has qualified the Thermo-Lag 330-1 fire barriers installed at Haddam Neck and Millstone Units 1, 2 and 3 by conducting fire endurance tests, (2) in general, the fire barrier configurations installed at Haddam Neck and Millstone Units 1, 2 and 3 are consistent with the qualification test assembly configurations, and (3) the deviations from the tested configuration have been evaluated, consistent with the philosophies of NRC GL 86-10 and the American Nuclear Insurers at the time of the installation.

Although Thermo-Lag barriers were evaluated and may have been considered qualified, the resuits 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 Ha'ddam Neck and Millstone Units 1, 2 and 3.

Compensatory measures for inoperable barriers are in place at Haddam Neck and Millstone Units 1, 2 and 3, and will remain in place until the' fire barriers can be declared operable and fully qualified to the fire rating requirements of 10 CFR Part 50, Appendix R. ' Your response to GL 92-08, however, did not provide a schedule by which corrective actions would be completed.

In your response to GL 92-08 you indicated that the actions necessary to 3

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 i

schedule for restoring the operability of these fire barriers.

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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Mr. John F. Opeka June 1, 1993 1

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, Original signed by John F. Stolz,. Director Project Directorate I-4 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc:

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_ June 1, 1993 Mr. John F. Opeka 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, C

.1 Jo n F. Stolz, Directo P oject Directorate I-4 ivision of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc: See next page

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Mr. John F. Opeka Millstone Nuclear Power Station Northeast Nuclear Energy Company Unit-1

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cc:

Gerald Garfield, Esquire R. M. Kacich, Director l

Day, Berry and Howard Nuclear Licensing Counselors at Law Northeast Utilities Service company City Place Post Office Box 270.

Hartford, Connecticut' 06103-3499 Hartford, Connecticut 06141-0270 W. D. Romberg, Vice President J. P. Stetz, Vice President Nuclear Operations Services Haddam Neck Plant Northeast Utilities Service Company Connecticut Yankee Atomic Power Company Post Office Box 270 362 Injun Hollow Road Hartford, Connecticut 06141-0270 East Hampton, Connecticut 06424-3099 r

Kevin McCarthy, Director Regional Administrator Radiation Control Unit Region'I Department of Environmental Protection U.S. Nuclear Regulatory Commission State Office Building 475 Allendale Road Hartford, Connecticut 06106 King of Prussia, Pennsylvania 19406 Allan Johanson, Assistant Director First Selectmen Office of Policy and Management Town of Waterford Policy Development and Planning Division Hall of Records 80 Washington Street 200 Boston Post Road Hartford, Connecticut 06106 Waterford, Connecticut 06385 S. E. Scace, Vice President P. D. Swetland, Resident Inspector Millstone Nuclear Power Station Millstone Nuclear Power Station Northeast Nuclear Energy Company c/o U.S. Nuclear Regulatory Commission Post Office Box 128 Post Office Box 513 Waterford, Connecticut 06385 Niantic, Connecticut 06357 H. F. Haynes, Nuclear Unit Director G. H. Bouchard, Director Millstone Unit No. 1 Nuclear Qual.ity Services Northeast Nuclear Energy Company Northeast UAilities Service Company Post Office Box 128 Post Office Box 270 Waterford, Connecticut 06385 Hartford, Connecticut 06141-0270 Nicholas S. Reynolds 4

Winston & Strawn 1400 L Street, NW Washington, DC 20005-3502 1

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