ML13345B348

Catawba Nuclear Station, Units 1 and 2, Closeout of Generic Letter, 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized-Water Reactors (TAC Nos. MC4674 and MC4675)

ML13345B348
Person / Time
Site:	Catawba
Issue date:	12/31/2013
From:	Paige J C Plant Licensing Branch II
To:	Henderson K Duke Energy Carolinas
Paige J C, NRR/DORL 415-5888
References
TAC MC4674, TAC MC4675
Download: ML13345B348 (3)

Text

UNITED NUCLEAR REGULATORY WASHINGTON, D.C. 20555-0001 December 31, 2013 Mr. K. Henderson Site Vice President Catawba Nuclear Station Duke Energy Carolinas, LLC 4800 Concord Road York, SC 29745 CATAWBA NUCLEAR STATION, UNITS 1 AND 2, CLOSEOUT OF GENERIC LETTER, 2004-02, "POTENTIAL IMPACT OF DEBRIS BLOCKAGE ON EMERGENCY RECIRCULATION DURING DESIGN BASIS ACCIDENTS AT PRESSURIZED-WATER REACTORS" (TAC NOS. MC4674 AND MC4675) Dear Mr. Henderson: The U.S. Nuclear Regulatory (NRC) issued Generic Letter (GL) 2004-02, "Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Water Reactors" (Agencywide Documents Access and Management System (ADAMS) Accession No. ML042360586) dated September 13, 2004, requesting that licensees address the issues raised by Generic Safety Issue (GSI) -191, "Assessment of Debris Accumulation on Pressurized Water Reactor Sump Performance." The stated purpose of GL 2004-02 was focused on demonstrating compliance with Title 10 of the Code of Federal Regulations (10 CFR) Part 50 Section 50.46, "Acceptance Criteria For Emergency Core Cooling Systems For Light Water Reactors." Specifically the GL requested addressees to perform an evaluation of the emergency core cooling system (ECCS) and containment spray system (CSS) recirculation and, if necessary take additional action to ensure system function, in light of the potential susceptibility of pressurized-water reactor (PWR) sump screens to blockage during a design basis accident requiring recirculation operation of the ECCS or CSS, and on the potential for additional adverse effects due to debris blockage of flowpaths necessary for ECCS and CSS recirculation and containment drainage. By letters dated March 1, 2005 (ADAMS Accession No. ML050670465) , September 1, 2005 (ADAMS Accession No. ML052500399) and June 28, 2006 (ADAMS Accession No. ML061870061), Duke Energy Carolinas, LLC (the licensee) provided responses to GL-2004-02 for the Catawba Nuclear Station Units 1 and 2. In order for the NRC staff to complete its review, by letter dated February 9,2006 (ADAMS Accession No. ML060370347) the NRC issued a request for additional information (RAI). By letters dated February 29, 2008 (ADAMS Accession No. ML080650559) and April 30, 2008, (ADAMS Accession No. ML081270091) the licensee provided responses to the RAls. The NRC staff reviewed the responses and concluded that additional information was still required. By letter dated November 21,2008 (ADAMS Accession No. ML083080373) the NRC issued a second set of RAls.

K. Henderson 2 By letters dated September 30,2010 (ADAMS Accession No. ML 102870100), August 13, (ADAMS Accession No. ML 12229A512), and July 31, 2013 (ADAMS Accession ML 13213A284), the licensee provided responses to the second set of The NRC staff performed a thorough review of all Duke Energy Carolinas, LLC responses RAI supplements to GL The NRC staff conclusions have been documented Accession No. ML 13331 A673). Based on the NRC staff conclusions, the NRC staff finds Duke Energy Carolinas, LLC has provided adequate information as requested by GL The NRC staff finds the information provided demonstrates that debris will not inhibit the or CSS performance of its intended function in accordance with 10 CFR 50.46 to adequate long term core cooling following a design basis accident. Therefore, the NRC finds the licensee's responses to are adequate and considers GL-2004-02 for the Catawba Nuclear Station, Units 1 and 2. No further information or action is requested the If you have any questions, please call me at 301-415-5888 . ..' \.....--..J////.C' , ,.' ,, / /Jason C. Paige, Project Manager V Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-413 and 50-414 cc: Distribution via Listserv K. Henderson 2 By letters dated September 30,2010 (ADAMS Accession No. ML 102870100), August (ADAMS Accession No. ML 12229A512), and July 31,2013 (ADAMS Accession ML 13213A284), the licensee provided responses to the second set of The NRC staff performed a thorough review of all Duke Energy Carolinas, LLC responses RAI supplements to GL 2004-02. The NRC staff conclusions have been documented Accession No. ML 13331A673). Based on the NRC staff conclusions, the NRC staff finds Duke Energy Carolinas, LLC has provided adequate information as requested by GL The NRC staff finds the information provided demonstrates that debris will not inhibit the or CSS performance of its intended function in accordance with 10 CFR 50.46 to adequate long term core cooling following a design basis accident. Therefore, the NRC finds the licensee's responses to GL-2004-04 are adequate and considers GL-2004-02 for the Catawba Nuclear Station, Units 1 and 2. No further information or action is requested the If you have any questions, please call me at Sincerely, IRA! Jason C. Paige, Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-413 and 50-414 cc: Distribution via Listserv DISTRIBUTION: PUBLIC LPL2-1 RlF RidsAcrsAcnw_MailCTR Resource RidsNrrDirsltsb Resource RidsNrrDorlLpl2-1 Resource RidsNrrDorlDpr Resource RidsNrrSsib RidsNrrLASFigueroa Resource RidsNrrPMCatawba-Resource (hard copy) RidsRgn2MailCenter Resource TMensah SSanders ADAMs AcceSSion N0.: ML13 5 *B "I dated 12119/1334 8348 syemal OFFICE NAME JPaige NRR/LPL2-1ILA SFigueroa NRR/PGCB/ABC SStuchell* NRRISSIB/ABC JStang NRR/LPL2-1/BC RPascarelli NRR/LPL2-1 IPM JPaige DATE 12/20/13 12/23/13 1211912013 12/20/13 12/31/13 12131113 OFFICIAL RECORD