ML12067A220

Request for Additional Information

ML12067A220
Person / Time
Site:	Farley
Issue date:	03/08/2012
From:	Martin R E Plant Licensing Branch II
To:	Ajluni M J Southern Nuclear Operating Co
Martin R E
References
TAC ME7094, TAC ME7095
Download: ML12067A220 (2)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 March 8, 2012 Mr. M. J. Ajluni Nuclear Licensing Director Southern Nuclear Operating Company, Inc. 40 Inverness Center Parkway Post Office Box 1295, Bin -038 Birmingham, AL 35201-1295 JOSEPH M. FARLEY NUCLEAR PLANT, UNITS 1 AND 2 -REQUEST FOR ADDITIONAL INFORMATION (TAC NOS. ME7094 AND ME7095 )

Dear Mr. Ajluni:

By letter dated September 9, 2011 (Agencywide Documents Access and Management System Accession No. ML 112521438), Southern Nuclear Operating Company, Inc. (SNC or the licensee), submitted a license amendment request regarding FNP to add Surveillance Requirement 3.3.1.14 to Technical Specification Table 3.3.1-1, "Reactor Trip System Instrumentation," Function 3, "Power Range Neutron Flux High Positive Rate." By letter dated February 3, 2012, SNC responded to a request for additional information (RAI). With respect to the response to RAI No.2, please provide the allocation time for processing the Power Range Neutron Flux High Positive Rate Trip (PFRT) function.

WCAP-13632-P-A, Revision 2, "Elimination of Pressure Sensor Response Time Testing Requirements," identifies a bounding generic rack response time allocation applicable to the protection functions in accordance with the protection function hardware.

Accordingly, the staff is requesting information about the bounding allocation time for the PFRT function for Farley, Units 1 and 2. Note that the WCAP allows users to estimate response time allocation times, using the specific channel card string for the protective function.

Please indicate whether that is SNC's practice in this regard. If a different practice or approach is used to derive the allocation time, please include a specific explanation in your response.

Please provide your response to the RAI within thirty (30) days of the date of this letter. Sincerely, Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-348 and 50-364 cc w/encl: Distribution via Listserv March 8, 2012 Mr. M. J. Ajluni Nuclear Licensing Director Southern Nuclear Operating Company, Inc. 40 Inverness Center Parkway Post Office Box 1295, Bin -038 Birmingham, AL 35201-1295 JOSEPH M. FARLEY NUCLEAR PLANT, UNITS 1 AND 2 -REQUEST FOR ADDITIONAL INFORMATION (TAC NOS. ME7094 AND ME7095 )

Dear Mr. Ajluni:

By letter dated September 9,2011 (Agencywide Documents Access and Management System Accession No. ML 112521438), Southern Nuclear Operating Company, Inc. (SNC or the licensee), submitted a license amendment request regarding FNP to add Surveillance Requirement 3.3.1.14 to Technical Specification Table 3.3.1-1, "Reactor Trip System Instrumentation," Function 3, "Power Range Neutron Flux High Positive Rate." By letter dated February 3, 2012, SNC responded to a request for additional information (RAI). With respect to the response to RAI No.2, please provide the allocation time for processing the Power Range Neutron Flux High Positive Rate Trip (PFRT) function.

WCAP-13632-P-A, Revision 2, "Elimination of Pressure Sensor Response Time Testing Requirements," identifies a bounding generic rack response time allocation applicable to the protection functions in accordance with the protection function hardware.

Accordingly, the staff is requesting information about the bounding allocation time for the PFRT function for Farley, Units 1 and 2. Note that the WCAP allows users to estimate response time allocation times, using the specific channel card string for the protective function.

Please indicate whether that is SNC's practice in this regard. If a different practice or approach is used to derive the allocation time, please include a specific explanation in your response.

Please provide your response to the RAI within thirty (30) days of the date of this letter. Sincerely, IRA! Robert E. Martin, Senior Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-348 and 50-364 cc: Distribution via Listserv DISTRIBUTION PUBLIC LPL2-1 RlF RidsNrrDorlLpl2-1 Resource RidsAcrsAcnw_MailCTR Resource RidsNrrDorlDpr Resource RidsRgn2MailCenter Resource RidsNrrLASFigueroa Resource RidsOgcRp Resource MSingletary, NRR RidsNrrDssStsb Resource RidsNrrPMFarley Resource RidsNrrDeEicb Resource RAlvarado, NRR a e ADAMS A ccesslon N 0.: ML

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