ML071070044: Difference between revisions

From kanterella
Jump to navigation Jump to search
(Created page by program invented by StriderTol)
(Created page by program invented by StriderTol)
 
(One intermediate revision by the same user not shown)
Line 3: Line 3:
| issue date = 05/10/2007
| issue date = 05/10/2007
| title = Request for Additional Information, Generic Letter 2006-03, Potentially Nonconforming Hemyc and MT Fire Barrier Configurations
| title = Request for Additional Information, Generic Letter 2006-03, Potentially Nonconforming Hemyc and MT Fire Barrier Configurations
| author name = Miller G E
| author name = Miller G
| author affiliation = NRC/NRR/ADRO/DORL/LPLI-2
| author affiliation = NRC/NRR/ADRO/DORL/LPLI-2
| addressee name = Peschel J M, St.Pierre G F
| addressee name = Peschel J, St.Pierre G
| addressee affiliation = Florida Power & Light Energy Seabrook, LLC
| addressee affiliation = Florida Power & Light Energy Seabrook, LLC
| docket = 05000443
| docket = 05000443
Line 18: Line 18:


=Text=
=Text=
{{#Wiki_filter: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
{{#Wiki_filter: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:==
==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)
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:==
==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 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 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
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:==
==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
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:==
==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)
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:==
==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 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 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
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:==
==Enclosure:==
RAI cc w/encl: See next pageDISTRIBUTION
RAI cc w/encl: See next page DISTRIBUTION:
:PUBLICRidsNrrDorlDprCJackson, NRR LPLI-2 R/FRidsNrrDorlLpl1-2(HChernoff)RidsOgcRp RidsNrrPMGMillerRidsNrrLAMOBrien RidsAcrsAcnwMailCenterRidsRgn1MailCenter DFrumkin, NRRSWeerakkody, NRR Accession Number: ML071070044OFFICELPLI-2/PMLPLI-2/LADRA/AFPB/BCLPLI-2/BCNAMEGEMillerMO'BrienSWeerakkodyHChernoffDATE5/1/075/3/075/3/075/10/07OFFICIAL RECORD COPY
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:
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
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


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.
Seabrook Station, Unit No. 1 cc:
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. Warner Vice President, Nuclear Operations Support Florida Power & Light Company P.O. Box 14000 Juno Beach, FL 33408-0420
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)?}}
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}}

Latest revision as of 07:21, 23 November 2019

Request for Additional Information, Generic Letter 2006-03, Potentially Nonconforming Hemyc and MT Fire Barrier Configurations
ML071070044
Person / Time
Site: Seabrook NextEra Energy icon.png
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