ML18040A087

Requests Addl Info Re Response to GL 92-08, Thermo-Lag 330-1 Fire Barriers

ML18040A087
Person / Time
Site:	Nine Mile Point
Issue date:	06/16/1993
From:	Brinkman D Office of Nuclear Reactor Regulation
To:	Sylvia B NIAGARA MOHAWK POWER CORP.
References
GL-92-08, GL-92-8, TAC-M85574, NUDOCS 9306210123
Download: ML18040A087 (8)

Text

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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555 0001 June 16, 1993 Docket No. 50-220 Hr. B. Ralph Sylvia Executive Vice President, Nuclear Niagara Mohawk Power Corporation 301 Plainfield Road

Syracuse, New York 13212

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION REGARDING NINE MILE POINT NUCLEAR STATION UNIT NO.

1

RESPONSE

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

(TAC NO. H85574)

By letter dated April 13,

1993, Niagara Mohawk Power Corporation (NMPC) provided a response to Generic Letter (GL) 92-08 for Nine Mile Point Nuclear Station Unit No.

1 (NMP-1).

Although the response stated that the Thermo-Lag 330-1 fire barriers installed at NHP-1 were not qualified by conducting individual specific fire endurance tests for the exact installed configurations, NHPC's response stated that the barriers were qualified to requirements and industry practice applicable at the time of installation.

The response stated that the governing criteria for the installation of these barriers were Thermal Science Incorporated (TSI) Technical note 20684 (Thermo-Lag 330 Fire Barrier System, Installation Procedures

Manual, Power Generating Plant Applications), Revision V, November 1985 and TSI Form 1082 (500).

NMPC's response further stated that deviations from the tested configurations have not been evaluated but that NHPC has documented acceptance by Pro-Tech Applications Services, Inc.

(an approved Thermal

Science, Inc. installer) or Thermal

Science, Inc. tha5 each installation meets the requirements for a 3-hour fire barrier.

However, the response did not specify the acceptance criteria or describe the test methods used for establishing these 3-hour ratings.

Please provide information regarding the acceptance criteria and test methods used for establishing these 3-hour ratings in NHPC's response to this request for additional information (RAI).

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.

NHPC's response states that appropriate actions to resolve these concerns are being developed through an industry program coordinated by NUHARC and NMPC would apply the results of the industry

program, when completed, to the Thermo-Lag 330-1 installations at NHP-1.

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Hr. B. Ralph Sylvia June 16, 1993 Compensatory measures for inoperable barriers are in place and will remain in place until the fire barriers can be declared operable.

NHPC's April 13,

1993, response stated that cables 171-71 and 171-151 have been derated 68.7X and 57.9N, respectively.

In NMPC's response to this RAI, please provide all test reports that document the ampacity derating characteristics of the fire barrier installed and state (1) that cables identified in the April 13,

1993, response are the only cables to which ampacity derating considerations

apply, (2) what industry standards were used in the determination of ampacity rating, and (3) what ampacity derating margin exclusive of typical derating factors (i.e.,

ambient temperature, cable fill) is available for Thermo-Lag 330-1 related ampacity derating factors.

In NMPC's response to GL 92-08, NMPC indicated that the actions necessary to restore (or confirm) the operability of these barriers will be based on the results of the NUHARC program.

The NRC staff expects that licensees referencing the NUHARC 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 including plant specific or unique fire barrier configurations that are not bound by the NUHARC program.

In accordance with the reporting requirements of GL 92-08, NMPC is also to confirm, in writing, completion of the corrective actions.,

The information requested by this letter is within the scope of the overall burden estimate in GL 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, cc:

See next page 8~zg p Donald S.

Brinkman, Senior Project Manager Project Directorate I-1 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation

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Hr. B. Ralph Sylvia Niagara Mohawk Power Corporation CC:

Nine Mile Point Nuclear Station

'nit No.

1

. Hark J. Wetterhahn, Esquire Winston 8 Strawn 1400 L Street, NW Washington, DC 20005-3502

. Supervisor Town of Scriba Route 8, Box 382

Oswego, New York 13126 Hr. Neil S.

Cams Vice President Nuclear Generation Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station Post Office Box 32

Lycoming, New York 13093

'esident Inspector U.S. Nuclear Regulatory Commission Post Office Box 126

Lycoming, New York 13093 Gary D. Wilson, Esquire Niagara Mohawk Power Corporation 300 Erie Boulevard West

Syracuse, New York 13202

~ Regional Administrator, Region I

U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, Pennsylvania 19406

's.

Donna Ross New York State Energy Office 2 Empire State Plaza 16th Floor

Albany, New York 12223 Mr. Kim Dahlberg Unit 1 Station Superintendent Nine Mile Point Nuclear Station Post Office Box 32

Lycoming, New York 13093

. Hr. David K. Greene Hanager Licensing Niagara Mohawk Power Corporation 301 Plainfield Road

Syracuse, New York 13212

" Charles Donaldson, Esquire Assistant Attorney General New York Department of Law 120 Broadway New York, New York 10271 Hr. Paul D.

Eddy State of New York Department of Public Service Power Division, System Operations 3 Empire State Plaza

Albany, New York 12223

rJ

Hr. B. Ralph Sylvia

'une 16, 1993 Compensatory measures for inoperable barriers are in place and will remain in place until the fire barriers can be declared operable.

NMPC's April 13,

1993, response stated that cables 171-71 and 171-151 have been derated 68.7%

and 57.9%, respectively.

In NMPC's response to this RAI, please provide all test reports that document the ampacity derating characteristics of the fire barrier installed and state (1) that cables identified in the April 13,

1993, response are the only cables to which ampacity derating considerations

apply, (2) what industry standards were used in the determination of ampacity rating, and (3) what ampacity derating margin exclusive of typical derating factors (i.e.,

ambient temperature, cable fill) is available for Thermo-Lag 330-1 related ampacity derating factors.

In NMPC's response to GL 92-08, NMPC indicated that the actions necessary to restore (or confirm) the operability of these barriers will be based on the results of the NUHARC program.

The NRC staff expects that licensees referencing the NUHARC 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 including plant specific or unique fire barrier configurations that are not bound by the NUHARC program.

In accordance with the reporting requirements of GL 92-08, NMPC is also to confirm, in writing, completion of the corrective actions.

The information requested

.by this letter is within the scope of the overall burden estimate in GL 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:

Donald S. Brinkman, Senior Project Manager Project Directorate I-l Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc:

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