ML071370591

Issuance of Report on Results of Staff Audit of Corrective Actions to Address Generic Letter 2004-02 (TAC Nos. MC4707 and MC4708)

ML071370591
Person / Time
Site:	Prairie Island
Issue date:	05/18/2007
From:	Mahesh Chawla NRC/NRR/ADRO/DORL/LPLIII-1
To:	Wadley M Nuclear Management Co
Mahesh Chawla, LPL3-1, 415-8371
Shared Package
ML071370498	List: ML071370591
References
GL-04-002, TAC MC4707, TAC MC4708
Download: ML071370591 (3)

Text

May 18, 2007Mr. Michael D. WadleySite Vice President Prairie Island Nuclear Generating Plant Nuclear Management Company, LLC 1717 Wakonade Drive East Welch, MN 55089

SUBJECT:

PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 AND 2 -ISSUANCE OF REPORT ON RESULTS OF STAFF AUDIT OF CORRECTIVE ACTIONS TO ADDRESS GENERIC LETTER 2004-02 (TAC NOS. MC4707 AND MC4708)

Dear Mr. Wadley:

Generic Letter (GL) 2004-02, "Potential Impact of Debris Blockage on Emergency RecirculationDuring Design Basis Accidents at Pressurized-Water Reactors," requested that all pressurized-water reactor licensees (1) evaluate the adequacy of the emergency sump recirculation function with respect to potentially adverse effects associated with post-accident debris, and (2) implement any plant modifications determined to be necessary. Nuclear Management Company (NMC), the operator/licensee, has conducted an evaluation of recirculation sump performance for Prairie Island Nuclear Generating Plant (PI) Unit No. 1 and Unit No. 2. NMC has installed new sump strainers in each unit.The staff has conducted an audit of the new sump design and associated analyses and testingfor PI. This is one of several audits to be conducted to establish a sample basis to assist in verifying the adequacy of licensee corrective actions to address GL 2004-02. The draft report was forwarded to NMC on April 23, 2007. NMC, after consultation with its contractors and vendors for GL 2004-02 corrective actions, has confirmed that there is no proprietary information contained in the audit report.The enclosed audit report provides NMC with feedback on its GL 2004-02 corrective actionsand supporting analyses. Also, this audit report will serve as a vehicle to inform other pressurized-water reactor licensees of the staff's technical positions.Sincerely,/RA/Mahesh L. Chawla, Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor RegulationDocket Nos. 50-282 and 50-306

Enclosure:

GL 2004-02 Audit Reportcc w/encl: See next pageMay 18, 2007 Mr. Michael D. WadleySite Vice President Prairie Island Nuclear Generating Plant Nuclear Management Company, LLC 1717 Wakonade Drive East Welch, MN 55089

SUBJECT:

PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 AND 2 -ISSUANCE OF REPORT ON RESULTS OF STAFF AUDIT OF CORRECTIVE ACTIONS TO ADDRESS GENERIC LETTER 2004-02 (TAC NOS. MC4707 AND MC4708)

Dear Mr. Wadley:

Generic Letter (GL) 2004-02, "Potential Impact of Debris Blockage on Emergency RecirculationDuring Design Basis Accidents at Pressurized-Water Reactors," requested that all pressurized-water reactor licensees (1) evaluate the adequacy of the emergency sump recirculation function with respect to potentially adverse effects associated with post-accident debris, and (2) implement any plant modifications determined to be necessary. Nuclear Management Company (NMC), the operator/licensee, has conducted an evaluation of recirculation sump performance for Prairie Island Nuclear Generating Plant (PI) Unit No. 1 and Unit No. 2. NMC has installed new sump strainers in each unit.The staff has conducted an audit of the new sump design and associated analyses and testingfor PI. This is one of several audits to be conducted to establish a sample basis to assist in verifying the adequacy of licensee corrective actions to address GL 2004-02. The draft report was forwarded to NMC on April 23, 2007. NMC, after consultation with its contractors and vendors for GL 2004-02 corrective actions, has confirmed that there is no proprietary information contained in the audit report.The enclosed audit report provides NMC with feedback on its GL 2004-02 corrective actionsand supporting analyses. Also, this audit report will serve as a vehicle to inform other pressurized-water reactor licensees of the staff's technical positions.Sincerely,/RA/Mahesh L. Chawla, Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor RegulationDocket Nos. 50-282 and 50-306

Enclosure:

GL 2004-02 Audit Reportcc w/encl: See next pageDISTRIBUTIONPUBLICLPL3-1 r/fRidsNrrDorlLpl3-1RidsNrrPMMChawla RidsNrrLATHarrisRidsOGCRpRidsAcrsAcnwMailCenterRidsNrrDirsltsb RidsRgn3MailCenterM. Scott RidsNrrDorlDprR ArchitzelPackage: ML071370498 Memo: ML071370591 Audit Report: ML070750065OFFICENRR/LPL3-1/PMNRR/LPL3-1/LASSIB/BCNRR/LPL3-1/BCNAMEMChawlaTHarrisM Scott LWhitney for LRaghavanDATE05/18/0705/18/0705/18/0705/18/07OFFICIAL RECORD COPY iiiPrairie Island Nuclear Generating Plant,Units 1 and 2 cc:

Jonathan Rogoff, EsquireVice President, Counsel & Secretary Nuclear Management Company, LLC 700 First Street Hudson, WI 54016Manager, Regulatory AffairsPrairie Island Nuclear Generating Plant Nuclear Management Company, LLC 1717 Wakonade Drive East Welch, MN 55089Manager - Environmental Protection DivisionMinnesota Attorney General's Office 445 Minnesota St., Suite 900 St. Paul, MN 55101-2127U.S. Nuclear Regulatory CommissionResident Inspector's Office 1719 Wakonade Drive East Welch, MN 55089-9642Regional Administrator, Region IIIU.S. Nuclear Regulatory Commission Suite 210 2443 Warrenville Road Lisle, IL 60532-4351AdministratorGoodhue County Courthouse Box 408 Red Wing, MN 55066-0408CommissionerMinnesota Department of Commerce 85 7th Place East, Suite 500 St. Paul, MN 55101-2198Tribal CouncilPrairie Island Indian Community ATTN: Environmental Department 5636 Sturgeon Lake Road Welch, MN 55089Nuclear Asset ManagerXcel Energy, Inc.

414 Nicollet Mall, R.S. 8 Minneapolis, MN 55401Michael B. SellmanPresident and Chief Executive Officer Nuclear Management Company, LLC 700 First Street Hudson, MI 54016Douglas E. CooperSenior Vice President and Chief Nuclear Officer Nuclear Management Company, LLC 700 First Street Hudson, WI 54016July 2006