ML071370591
| 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: |
| References | |
| GL-04-002, TAC MC4707, TAC MC4708 | |
| Download: ML071370591 (3) | |
Text
May 18, 2007 Mr. Michael D. Wadley Site 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 Recirculation During 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 testing for 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 actions and supporting analyses. Also, this audit report will serve as a vehicle to inform other pressurized-water reactor licensees of the staffs technical positions.
Sincerely,
/RA/
Mahesh L. Chawla, Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-282 and 50-306
Enclosure:
GL 2004-02 Audit Report cc w/encl: See next page May 18, 2007
Mr. Michael D. Wadley Site 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 Recirculation During 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 testing for 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 actions and supporting analyses. Also, this audit report will serve as a vehicle to inform other pressurized-water reactor licensees of the staffs technical positions.
Sincerely,
/RA/
Mahesh L. Chawla, Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-282 and 50-306
Enclosure:
GL 2004-02 Audit Report cc w/encl: See next page DISTRIBUTION PUBLIC LPL3-1 r/f RidsNrrDorlLpl3-1 RidsNrrPMMChawla RidsNrrLATHarris RidsOGCRp RidsAcrsAcnwMailCenter RidsNrrDirsltsb RidsRgn3MailCenter M. Scott RidsNrrDorlDpr R Architzel Package: ML071370498 Memo: ML071370591 Audit Report: ML070750065 OFFICE NRR/LPL3-1/PM NRR/LPL3-1/LA SSIB/BC NRR/LPL3-1/BC NAME MChawla THarris M Scott LWhitney for LRaghavan DATE 05/18/07 05/18/07 05/18/07 05/18/07 OFFICIAL RECORD COPY
iii Prairie Island Nuclear Generating Plant, Units 1 and 2 cc:
Jonathan Rogoff, Esquire Vice President, Counsel & Secretary Nuclear Management Company, LLC 700 First Street Hudson, WI 54016 Manager, Regulatory Affairs Prairie Island Nuclear Generating Plant Nuclear Management Company, LLC 1717 Wakonade Drive East Welch, MN 55089 Manager - Environmental Protection Division Minnesota Attorney Generals Office 445 Minnesota St., Suite 900 St. Paul, MN 55101-2127 U.S. Nuclear Regulatory Commission Resident Inspector's Office 1719 Wakonade Drive East Welch, MN 55089-9642 Regional Administrator, Region III U.S. Nuclear Regulatory Commission Suite 210 2443 Warrenville Road Lisle, IL 60532-4351 Administrator Goodhue County Courthouse Box 408 Red Wing, MN 55066-0408 Commissioner Minnesota Department of Commerce 85 7th Place East, Suite 500 St. Paul, MN 55101-2198 Tribal Council Prairie Island Indian Community ATTN: Environmental Department 5636 Sturgeon Lake Road Welch, MN 55089 Nuclear Asset Manager Xcel Energy, Inc.
414 Nicollet Mall, R.S. 8 Minneapolis, MN 55401 Michael B. Sellman President and Chief Executive Officer Nuclear Management Company, LLC 700 First Street Hudson, MI 54016 Douglas E. Cooper Senior Vice President and Chief Nuclear Officer Nuclear Management Company, LLC 700 First Street Hudson, WI 54016 July 2006