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:	Geoffrey Miller NRC/NRR/ADRO/DORL/LPLI-2
To:	Peschel J, St.Pierre G Florida Power & Light Energy Seabrook
Miller, G. Edward, 415-2481
References
TAC MD1631
Download: ML071070044 (5)

Text

May 10, 2007 Mr. 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 ADDITIONAL INFORMATION (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 to Generic 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 it was 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 Regulation Docket No. 50-443

Enclosure:

RAI cc w/encl: See next page

May 10, 2007 Mr. 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 ADDITIONAL INFORMATION (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 to Generic 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 it was 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 Regulation Docket No. 50-443

Enclosure:

RAI cc w/encl: See next page DISTRIBUTION:

PUBLIC RidsNrrDorlDpr CJackson, NRR LPLI-2 R/F RidsNrrDorlLpl1-2(HChernoff) RidsOgcRp RidsNrrPMGMiller RidsNrrLAMOBrien RidsAcrsAcnwMailCenter RidsRgn1MailCenter DFrumkin, NRR SWeerakkody, NRR Accession Number: ML071070044 OFFICE LPLI-2/PM LPLI-2/LA DRA/AFPB/BC LPLI-2/BC NAME GEMiller MOBrien SWeerakkody HChernoff DATE 5/1/07 5/3/07 5/3/07 5/10/07 OFFICIAL RECORD COPY

Seabrook Station, Unit No. 1 cc:

Mr. J. A. Stall John Giarrusso Senior Vice President, Nuclear and Massachusetts Emergency Management Agency Chief Nuclear Officer 400 Worcester Road Florida Power & Light Company Framingham, MA 01702-5399 P.O. Box 14000 Juno Beach, FL 33408-0420 Ms. Kelly Ayotte, Attorney General Mr. Orvil Fitch, Deputy Attorney General Mr. Peter Brann 33 Capitol Street Assistant Attorney General Concord, NH 03301 State House, Station #6 Augusta, ME 04333 Mr. Christopher M. Pope, Director Homeland Security & Emergency Mgmt.

Resident Inspector New Hampshire Department of Safety U.S. Nuclear Regulatory Commission Bureau of Emergency Management Seabrook Nuclear Power Station 33 Hazen Drive P.O. Box 1149 Concord, NH 03301 Seabrook, NH 03874 Mr. M. S. Ross, Managing Attorney Town of Exeter Florida Power & Light Company 10 Front Street P.O. Box 14000 Exeter, NH 03823 Juno Beach, FL 33408-0420 Regional Administrator, Region I Mr. Rajiv S. Kundalkar U.S. Nuclear Regulatory Commission Vice President - Nuclear Engineering 475 Allendale Road Florida Power & Light Company King of Prussia, PA 19406 P.O. Box 14000 Juno Beach, FL 33408-0420 Office of the Attorney General One Ashburton Place, 20th Floor James M. Peschel Boston, MA 02108 Regulatory Programs Manager FPL Energy Seabrook, LLC Board of Selectmen PO Box 300 Town of Amesbury Seabrook, NH 03874 Town Hall Amesbury, MA 01913 Ms. Marjan Mashhadi Senior Attorney Mr. Robert Poole Florida Power & Light Company Federal Emergency Management Agency 801 Pennsylvania Ave., NW Suite 220 Region I Washington, DC 20004 99 High Street, 6th Floor Boston, MA 02110 Mr. Tom Crimmins Polestar Applied Technology One First Street, Suite 4 Los Altos, CA 94019

Seabrook Station, Unit No. 1 cc:

Mr. Mark E. Warner Vice President, Nuclear Operations Support Florida Power & Light Company P.O. Box 14000 Juno Beach, FL 33408-0420

REQUEST FOR ADDITIONAL INFORMATION RESPONSE TO GENERIC LETTER 2006-03 POTENTIALLY NONCONFORMING HEMYC AND MT FIRE BARRIER CONFIGURATIONS FPL ENERGY SEABROOK, LCC SEABROOK STATION, UNIT NO. 1 DOCKET NO. 50-443 By letter dated June 9, 2006, FPL Energy Seabrook, LLC (FPLE), responded to Generic Letter 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, utilizes the 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 the plant 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 configurations bounded 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 temperature curve 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 of fire damage (e.g., temperature rise criteria, operation during fire conditions, meggering, etc)?

Enclosure