ML071070044

Request for Additional Information, Generic Letter 2006-03, Potentially Nonconforming Hemyc and MT Fire Barrier Configurations

ML071070044
Person / Time
Site:	Seabrook
Issue date:	05/10/2007
From:	Miller G E NRC/NRR/ADRO/DORL/LPLI-2
To:	Peschel J M, St.Pierre G F Florida Power & Light Energy Seabrook
Miller, G. Edward, 415-2481
References
TAC MD1631
Download: ML071070044 (5)

Text

May 10, 2007Mr. Gene F. St. Pierre, Site Vice Presidentc/o James M. Peschel Seabrook Station FPL Energy Seabrook, LLC PO Box 300 Seabrook, NH 03874

SUBJECT:

SEABROOK STATION, UNIT NO. 1 - REQUEST FOR ADDITIONALINFORMATION (RAI), GENERIC LETTER 2006-03, "POTENTIALLY NONCONFORMING HEMYC AND MT FIRE BARRIER CONFIGURATIONS (TAC NO. MD1631)

Dear Mr. St. Pierre:

The Nuclear Regulatory Commission (NRC) acknowledges the receipt of your response toGeneric Letter 2006-03, "Potentially Nonconforming Hemyc and MT Fire Barrier Configurations," dated June 9, 2006. Under oath or affirmation, you have stated that the Seabrook Station, Unit No. 1 (Seabrook) does not rely on either the Hemyc or MT fire barrier system. Additionally, your letter stated that other 1- or 3-hour fire barriers that separate redundant safe shutdown trains located within the same fire area are installed at Seabrook.

The NRC staff requires additional information to evaluate the acceptability of this alternate fire barrier material. The specific information requested is contained in the enclosure to this letter. The information was discussed with Mr. Michael O'Keefe of your staff on April 12, 2007, and itwas agreed that you would respond to these questions within 60 days from the date of this letter. If you have any questions regarding this response, please contact me at (301) 415-2481. Sincerely,/ra/G. Edward Miller, Project ManagerPlant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor RegulationDocket No. 50-443

Enclosure:

RAI cc w/encl: See next page May 10, 2007Mr. Gene F. St. Pierre, Site Vice President c/o James M. Peschel Seabrook Station FPL Energy Seabrook, LLC PO Box 300 Seabrook, NH 03874

SUBJECT:

SEABROOK STATION UNIT NO. 1 - REQUEST FOR ADDITIONALINFORMATION (RAI), GENERIC LETTER 2006-03, "POTENTIALLY NONCONFORMING HEMYC AND MT FIRE BARRIER CONFIGURATIONS (TAC NO. MD1631)

Dear Mr. St. Pierre:

The Nuclear Regulatory Commission (NRC) acknowledges the receipt of your response toGeneric Letter 2006-03, "Potentially Nonconforming Hemyc and MT Fire Barrier Configurations," dated June 9, 2006. Under oath or affirmation, you have stated that the Seabrook Station, Unit No. 1 (Seabrook) does not rely on either the Hemyc or MT fire barrier system. Additionally, your letter stated that other 1- or 3-hour fire barriers that separate redundant safe shutdown trains located within the same fire area are installed at Seabrook.

The NRC staff requires additional information to evaluate the acceptability of this alternate fire barrier material. The specific information requested is contained in the enclosure to this letter. The information was discussed with Mr. Michael O'Keefe of your staff on April 12, 2007, and itwas agreed that you would respond to these questions within 60 days from the date of this letter. If you have any questions regarding this response, please contact me at (301) 415-2481. Sincerely,/ra/G. Edward Miller, Project Manager Plant Licensing Branch I-2 Division of Operating Reactor Licensing Office of Nuclear Reactor RegulationDocket No. 50-443

Enclosure:

RAI cc w/encl: See next pageDISTRIBUTION

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Seabrook Station, Unit No. 1 cc:

Mr. J. A. StallSenior Vice President, Nuclear and Chief Nuclear Officer Florida Power & Light Company P.O. Box 14000 Juno Beach, FL 33408-0420Mr. Peter BrannAssistant Attorney General State House, Station #6 Augusta, ME 04333Resident InspectorU.S. Nuclear Regulatory Commission Seabrook Nuclear Power Station P.O. Box 1149 Seabrook, NH 03874Town of Exeter10 Front Street Exeter, NH 03823Regional Administrator, Region IU.S. Nuclear Regulatory Commission

475 Allendale Road King of Prussia, PA 19406Office of the Attorney GeneralOne Ashburton Place, 20th Floor Boston, MA 02108Board of SelectmenTown of Amesbury Town Hall Amesbury, MA 01913Mr. Robert PooleFederal Emergency Management Agency Region I 99 High Street, 6 th FloorBoston, MA 02110Mr. Tom CrimminsPolestar Applied Technology One First Street, Suite 4 Los Altos, CA 94019John GiarrussoMassachusetts Emergency Management Agency 400 Worcester Road Framingham, MA 01702-5399Ms. Kelly Ayotte, Attorney GeneralMr. Orvil Fitch, Deputy Attorney General 33 Capitol Street Concord, NH 03301Mr. Christopher M. Pope, DirectorHomeland Security & Emergency Mgmt.

New Hampshire Department of Safety Bureau of Emergency Management 33 Hazen Drive Concord, NH 03301Mr. M. S. Ross, Managing AttorneyFlorida Power & Light Company P.O. Box 14000 Juno Beach, FL 33408-0420Mr. Rajiv S. KundalkarVice President - Nuclear Engineering Florida Power & Light Company P.O. Box 14000 Juno Beach, FL 33408-0420James M. PeschelRegulatory Programs Manager FPL Energy Seabrook, LLC PO Box 300 Seabrook, NH 03874Ms. Marjan MashhadiSenior Attorney Florida Power & Light Company 801 Pennsylvania Ave., NW Suite 220 Washington, DC 20004 Seabrook Station, Unit No. 1 cc:

Mr. Mark E. WarnerVice President, Nuclear Operations Support Florida Power & Light Company P.O. Box 14000 Juno Beach, FL 33408-0420 EnclosureREQUEST FOR ADDITIONAL INFORMATIONRESPONSE TO GENERIC LETTER 2006-03POTENTIALLY NONCONFORMING HEMYC AND MT FIRE BARRIER CONFIGURATIONSFPL ENERGY SEABROOK, LCCSEABROOK STATION, UNIT NO. 1DOCKET NO. 50-443By letter dated June 9, 2006, FPL Energy Seabrook, LLC (FPLE), responded to GenericLetter 2006-03, "Potentially Nonconforming Hemyc and MT Fire Barrier Configurations." The Nuclear Regulatory Commission (NRC) staff has been reviewing this response and finds that the following information is required to complete its review: 1.In your letter dated June 9, 2006, you stated that Seabrook Station, Unit No. 1, utilizesthe 3M Interam material as a 1- or 3-hour fire barrier that separates redundant safe shutdown trains located within the same fire area. Additionally, you stated that the ratings were based on fire resistance testing. The NRC staff requests that you describe what guidance was used to conclude that the barriers comply with the regulations contained in Appendix R to Title 10 of the Code of Federal Regulations, Part 50. In responding, please address the following:

a)Is the support protection and penetrating item protection for these barriers in theplant representative of the protection provided during the testing? If not, how were deviations evaluated?b)Does the testing encompass or bound the installed configurations (for example,were the tested configurations similar in size and shape as the installed configurations)? If not, how was the barrier determined to be bounding?c)Is the plant cable loading (i.e., the thermal mass) of the installed configurationsbounded by the tested configurations? If not, how were raceways having less thermal mass evaluated?d)Was the American Society for Testing and Materials E-119 time temperaturecurve used during testing of these barriers? If not what temperatures were

used?e)What measure was used to determine that the protected cables would be free offire damage (e.g., temperature rise criteria, operation during fire conditions, meggering, etc)?