ML13030A062

Wolf Creek Generating Station - Request for Additional Information, License Amendment Request, Revise Technical Specification 3.4.12, Low Temperature Overpressure Protection System

ML13030A062
Person / Time
Site:	Wolf Creek
Issue date:	02/01/2013
From:	Lyon C F Plant Licensing Branch IV
To:	Sunseri M W Wolf Creek
Lyon C F
References
TAC MF0309
Download: ML13030A062 (4)

Text

UNITED NUCLEAR REGULATORY WASHINGTON, D.C. 20555-0001 February 1, 2013 Mr. Matthew W. Sunseri President and Chief Executive Officer Wolf Creek Nuclear Operating Corporation Post Office Box 411 Burlington, KS 66839 WOLF CREEK GENERATING STATION -REQUEST FOR ADDITIONAL INFORMATION RE: REVISION TO TECHNICAL SPECIFICATION 3.4.12, "LOW TEMPERATURE OVERPRESSURE PROTECTION (L TOP) SYSTEM" (TAC NO. MF0309)

Dear Mr. Sunseri:

By letter dated November 21, 2012 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML 12334A406), Wolf Creek Nuclear Operating Corporation (the licensee) requested a license amendment to revise Wolf Creek Generating Station's Technical Specification (TS) 3.4.12, "Low Temperature Overpressure Protection (LTOP) System," to reflect the mass input transient analysis that assumes an emergency core cooling system centrifugal charging pump and the normal charging pump capable of injecting into the reactor coolant system during the TS 3.4.12 Applicability.

The U.S. Nuclear Regulatory Commission (NRC) staff is currently reviewing the submittal and has determined that the information identified in the enclosed request for additional information (RAI) is needed in order for the NRC staff to complete its review. Please provide a response to the RAI within 30 days from the date of this letter.

M. Sunseri -If you have any questions, please contact me at 301-415-2296 or via e-mail at Fred. Lyon@nrc.gov.

Sincerely, Carl F. Lyon, Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-482

Enclosure:

As stated cc w/encl: Distribution via Listserv REQUEST FOR ADDITIONAL INFORMATION LICENSE AMENDMENT REQUEST FOR TS 3.4.12 WOLF CREEK NUCLEAR OPERATING CORPORATION WOLF CREEK GENERATING STATION DOCKET NO. 50-482 By letter dated November 21, 2012 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML 12334A406), Wolf Creek Nuclear Operating Corporation (the licensee) requested a license amendment to revise the Wolf Creek Generating Station's Technical Specification (TS) 3.4.12, "Low Temperature Overpressure Protection (L TOP) System," to reflect the mass input transient analysis that assumes an emergency core cooling system centrifugal charging pump and the normal charging pump capable of injecting into the reactor coolant system during the TS 3.4.12 Applicability.

The U.S. Nuclear Regulatory Commission (NRC) staff has determined that the additional information requested below is needed to complete its review of the licensee's request. The licensee proposes to change NOTE 1 to TS 3.4.12 in such a way as to allow, for up to 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, three charging pumps to be capable of injection into the reactor coolant system. Please explain whether the mass input analysis of record addresses this condition.

If it does not, please provide a justification for the revising the note. Please provide a more detailed summary of the mass input analysis that is discussed in Attachment I, Section 3, of the licensee's November 21,2012, letter. Please include a description of the significant inputs to the analysis, explain how the LOFTRAN code was used (i.e., by referencing an approved methodology), provide key plots of the results, characterize any significant modeling assumptions, and explain how the results conform to the applicable acceptance criteria.

Enclosure M. Sunseri -2 If you have any questions, please contact me at 301-415-2296 or via e-mail at Fred.Lyon@nrc.gov. Sincerely, IRAJ Carl F. Lyon, Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-482

Enclosure:

As stated cc w/encl: Distribution via Listserv DISTRIBUTION:

PUBLIC LPLIV Reading RidsAcrsAcnw

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