ML20045B800
| ML20045B800 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 06/16/1993 |
| From: | Menning J Office of Nuclear Reactor Regulation |
| To: | Sylvia B NIAGARA MOHAWK POWER CORP. |
| References | |
| GL-92-08, GL-92-8, TAC-M85575, NUDOCS 9306210100 | |
| Download: ML20045B800 (4) | |
Text
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UNITED STATES
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NUCLEAR REGULATORY COMMISSION
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WASHINGTON, D C. 20555-0001 i
June 16, 1993 g
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- ,,s Docket No. 50-410 Mr. B. Ralph Sylvia Executive Vice President, Nuclear Niagara Mobawk Power Corporation 301 Plainfield Road Syracuse, New York 13212
Dear Mr. Sylvia:
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING NINE MILE POINT NUCLEAR STATION, UNIT 2 RESPONSE TO GENERIC LETTER 92-08, " THERM 0-LAG 330-1 FIRE BARRIERS," (TAC N0. M85575)
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 2 (NMP-2). Although the response stated that the Thermo-Lag 330-1 fire barriers installed at NMP-2 were not qualified by conducting individual specific fire endurance tests for the exact installed configurations, NMPC'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. The Thermo-Lag 330-1 fire barrier configurations installed in NMP-2 were designed and constructed by Stone and Webster Engineering Corporation (SWEC), the Architect Engineer for NMP-2. NMPC reviewed and accepted the work of SWEC. The response stated that the fire barrier installations do not deviate from TSI's guidance. However, the response did not specify the acceptance criteria or describe the test methods used for establishing the 3-hour ratings.
Please provide information regarding the acceptance criteria and test methods used for establishing the 3-hour ratings in NMPC's response to this request for additional information (RAI).
Although Thermo-Lag barriers were evaluated and may have been considered qualified, the results cf recent tests and inspections indicate that further actions are now necessary to address fire endurance and ampacity derating of Thermo-Lag barriers.
HMPC's resporm "ates that appropriate actions to resolve these concerns are being developed through an industry program coordinated by NUMARC and NMPC would apply the results of the industry 4
program, when completed, to the Thermo-Lag 330-1 installations at NMP-2.
9306210100 930616 PDR ADOCK 05000410
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Mr. B. Ralph Sylvia June 16, 1993 s
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 Power Cable 2SWPAGK017 which is routed through 17 feet of Thermo-Lag protected 1 1/2-inch diameter conduit 2CK20lGL has been derated 67.5%.
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 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 NUMARC program. The NRC 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 including plant specific or unique fire barrier configurations that are not bound by the NUMARC program.
In accordance with the renorting 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, N'
m J hn E. Menni
, Project Manager Project Directorate I-1 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc:
See next page
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~ Mr. B. Ralph Sylvia Nine-Mile Point Nuclear Station j
Niagara Mohawk Power Corporation Unit No. 2 cc:
Mark J. Wetterhahn, Esquire Regional Administrator, Region I i
Winston & Strawn U. S. Nuclear Regulatory Commission 1400 L Street, NW.
475 Allendale Road Washington, DC 20005-3502 King of Prussia, PA 19406 Mr. Richard Goldsmith Charles Donaldson, Esquire Syracuse University Assistant Attorney General College of Law New York Department of Law
. E. I. White Hall Campus 120 Broadway Syracuse, New York.12223,
- l Resident Inspector Mr. Richard M. Kessel Nine Mile Point Nuclear Station Chair and Executive Director 1
P. O. Box 126 State Consumer Protection Board Lycoming, New York 13093 99 Washington Avenue Albany, New York 12210 Gary D. Wilson, Esquire
. 3 Niagara Mohawk Power Corporation-Mr. Martin J. McCormick Jr.
300 Erie Boulevard West Plant Manager, Unit 2 Syracuse, New York 13202 Nine Mile Point Nuclear Station Niagara Mohawk Power-Corporation j
Mr. David K. Greene P. O. Box 32 Manager Licensing Lycoming, New York-13093-Niagara Mohawk Power Corporation 301 Plainfield Road Mr. Neil S..Carns Syracuse, New York 13212 Vice. President - Nuclear Generation Nine Mile Point Nuclear Station-Ms. Donna Ross Niagara Mohawk Power Corporation 1
New York State Energy Office P. O. Box ~32 2 Empire State Plaza Lycoming, New York 13093 16th Floor Albany, New York 12223 Supervisor Town of Scriba Route 8, Box 382 Oswego, New York 13126 i
1
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Mr. 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.
NMPC's April 13, 1993, response stated that Power Cable 2SWPAGK017 which is routed through 17 feet of Thermo-Lag protected 1 1/2-inch diameter conduit 2CK20lGL has been derated.67.5%.
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 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 NUMARC program. The NRC 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 including plant specific or unique fire barrier configurations that are not i
bound by the NUMARC 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:
John E. Menning, Project Manager Project Directorate I-1 Division of Reactor Projects - 1/11
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Office of Nuclear Reactor Regulation cc:
See next page Distribution:
' Docket. File.
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