ML083250720
| ML083250720 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 12/05/2008 |
| From: | Richard Plasse License Renewal Projects Branch 2 |
| To: | Wadley M Northern States Power Co |
| Plasse, Richard 301-415-1427 DLR/RPB2 | |
| References | |
| TAC MD8513, TAC MD8514 | |
| Download: ML083250720 (6) | |
Text
December 5, 2008 Mr. Michael D. Wadley Site Vice President Prairie Island Nuclear Generating Plant, Units 1 and 2 Northern States Power Company, Minnesota 1717 Wakonade Drive East Welch, MN 55089
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 & 2, LICENSE RENEWAL APPLICATION (TAC Nos. MD8513 AND MD8514)
Dear Mr. Wadley:
By letter dated April 11, 2008, Nuclear Management Company, LLC, now known as Northern States Power Company, Minnesota, submitted an application pursuant to Title 10 of the Code of Federal Regulations Part 54 (10 CFR Part 54) to renew the operating license for Prairie Island Nuclear Generating Plant, Units 1 and 2, for review by the U.S. Nuclear Regulatory Commission (NRC or the staff). The staff is reviewing the information contained in the license renewal application and has identified, in the enclosure, areas where additional information is needed to complete the review. Further requests for additional information may be issued in the future.
Items in the enclosure were discussed with Gene Eckholt, of your staff, and a mutually agreeable date for the response is within 45 days from the date of this letter. If you have any questions, please contact me at 301-415-1427 or by e-mail at Richard.Plasse@nrc.gov.
Sincerely,
/RA/
Richard Plasse, Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-282 and 50-306
Enclosure:
As stated cc w/encl: See next page
December 5, 2008 Mr. Michael D. Wadley Site Vice President Prairie Island Nuclear Generating Plant, Units 1 and 2 Northern States Power Company, Minnesota 1717 Wakonade Drive East Welch, MN 55089
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 & 2, LICENSE RENEWAL APPLICATION (TAC Nos. MD8513 AND MD8514)
Dear Mr. Wadley:
By letter dated April 11, 2008, Nuclear Management Company, LLC, now known as Northern States Power Company, Minnesota, submitted an application pursuant to Title 10 of the Code of Federal Regulations Part 54 (10 CFR Part 54) to renew the operating license for Prairie Island Nuclear Generating Plant, Units 1 and 2, for review by the U.S. Nuclear Regulatory Commission (NRC or the staff). The staff is reviewing the information contained in the license renewal application and has identified, in the enclosure, areas where additional information is needed to complete the review. Further requests for additional information may be issued in the future.
Items in the enclosure were discussed with Gene Eckholt, of your staff, and a mutually agreeable date for the response is within 45 days from the date of this letter. If you have any questions, please contact me at 301-415-1427 or by e-mail at Richard.Plasse@nrc.gov.
Sincerely,
/RA/
Richard Plasse, Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-282 and 50-306
Enclosure:
As stated cc w/encl: See next page DISTRIBUTION: See next page ADAMS Accession Number: ML083250720 OFFICE LA:DLR PM:RPB2:DLR BC:RPB2:DLR NAME IKing RAPlasse DWrona DATE 11/21 /08 12/02/08 12/05/08 OFFICIAL RECORD COPY
Letter to M. Wadley from R. Plasse, dated December 5, 2008 DISTRIBUTION:
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 & 2, LICENSE RENEWAL APPLICATION (TAC Nos. MD8513 AND MD8514)
HARD COPY:
DLR RF E-MAIL:
PUBLIC B. Holian / S. Lee (RidsNrrDlr)
T. Combs, OCA T. Madden, OCA R. Shane, OCA B. Keeling, OCA D. Wrona (RidsNrrDlrRebb)
R. Rikhoff (RidsNrrDlrReba)
R. Plasse T. Wengert N. Goodman R. Skokowski K. Stoedter P. Zurawski OPA (RidsOpaMail)
I. Couret, OPA V. Mitlyng B. Mizuno, OGC OGC (RidsOGCMailRoom)
DLR/REBB
Prairie Island Nuclear Generating Plant, Units 1 and 2 cc:
Peter M. Glass Assistant General Counsel Xcel Energy Services, Inc.
414 Nicollet Mall (MP4)
Minneapolis, MN 55401 Manager, Regulatory Affairs Prairie Island Nuclear Generating Plant Northern States Power Company, Minnesota 1717 Wakonade Drive East Welch, MN 55089 Manager - Environmental Protection Division Minnesota Attorney General=s 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 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 Charles R. Bomberger Vice President Nuclear Projects 414 Nicollet Mall, (MP4)
Minneapolis, MN 55401 Dennis L. Koehl Chief Nuclear Officer Northern States Power Company, Minnesota 414 Nicollet Mall (MP4)
Minneapolis, MN 55401 Joel P. Sorenson Director, Site Operations Prairie Island Nuclear Generating Plant Northern States Power Company, Minnesota 1717 Wakonade Drive East Welch, MN 55089
REQUEST FOR ADDITIONAL INFORMTION PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 AND 2 LICENSE RENEWAL APPLICATION (TAC Nos. MD8513 AND MD8514)
RAI B2.1.3-1 The staff noted that the applicant, in License Renewal Application (LRA) Appendix B2.1.3, describes the present approved Prairie Island Nuclear Generating Plant (PINGP)
Inservice Inspection (ISI) program for the fourth ISI interval. Specified limitations, modifications and NRC approved alternatives described in Appendix B2.1.3 only apply to the fourth ISI interval. Please describe how PINGP will implement the ISI program during the period of extended operation.
RAI B2.1.27-1 The staff reviewed LRA Appendix B2.1.27, Nickel-Alloy Nozzles and Penetrations Program and noted that there was no operating experience associated with this program. The staff also noted that this program is credited for managing primary water stress corrosion cracking (PWSCC) of three components: pressurizer surge nozzle, core support pads, and instrumentation tube penetrations (bottom head). Please provide operating experience for these components including inspection methods and results and any mitigative measures taken to manage PWSCC.
RAI B2.1.8-1 NUREG-1801, Generic Aging Lessons Learned (GALL) aging management program (AMP) XI.M34, recommends in the preventative actions element, coating underground piping with a protective coating system. In LRA AMP B2.1.8 the applicant stated that portions of buried coated carbon steel piping of the cooling water and fire protection systems have been replaced as a result of microbiologically-influenced corrosion indications on the piping inside diameter. It is not clear what replacement material(s) were used or if coating or wrapping was used. Please specify what replacement materials were used and if the replacement piping was coated or wrapped?
RAI B2.1.8-2 GALL AMP XI.M34 recommends, in the detection of aging element, that any credited inspection should be performed in areas with the highest likelihood of corrosion problems, and in areas with a history of corrosion problems. In LRA AMP B2.1.8 the applicant stated that opportunistic or focused excavations and subsequent visual inspections will be performed on buried piping and tanks but does not identify how locations will be identified for inspection. Please identify how locations for focused inspections will be identified for excavation and inspection?
ENCLOSURE
RAI B2.1.19-1 GALL AMP XI.M30 recommends, in the monitoring and trending element, that particulate contamination concentrations are monitored in accordance with plant technical specifications or at least quarterly. The applicant stated in LRA B2.1.19, that particulate contamination testing of fuel oil will be performed annually and not quarterly; annual testing is sufficiently frequent to verify that particulates are not forming, and the absence of previous particulate contamination during routine historical sampling and analysis justifies a relaxed sampling frequency. The staff considers that operating history alone is not sufficient justification for relaxing the sampling frequency. Provide additional justification for relaxation of the sampling frequency.
RAI B2.1.19-2 GALL AMP XI.M30 recommends, in the monitoring and trending element, to monitor and trend biological activity at least quarterly. In its review of LRA B2.1.19 and the associated basis document, the staff noted that the applicant does not state whether or not fuel oil is tested for biological activity. Please confirm if microbiological activity is monitored in fuel oil. If so, what is the frequency of monitoring for microbiological activity? If not, why is lack of monitoring for biological activity not identified as an exception to GALL AMP XI.M30?
RAI B2.1.19-3 GALL AMP XI.M30 recommends, in the preventive actions and detection of aging effects elements, periodic cleaning and visual examination of fuel oil tanks. GALL AMP XI.M30 also recommends in the detection of aging element, ultrasonic thickness measurements for locations where contaminants can accumulate, such as tank bottoms, to ensure significant degradation is not occurring. In its review of LRA B2.1.19 and the associated basis document, the staff noted that it is not clear if all fuel tanks that are not subjected to periodic cleaning and visual inspection of the tank interior will be subjected to ultrasonic testing (UT) of the tank bottoms or what the extent of UT of tank bottoms (grid size) will be. The applicant states in LRA B2.1.19, Exception to NUREG-1801, that day tanks and clean fuel oil leakage collection tanks of the diesel generators, and the day tanks of the diesel cooling water pumps and the diesel fire pump will not be subjected to cleaning and visual inspection. An enhancement to LRA B2.1.19 states that select tank bottoms will be subjected to UT. Please provide the results of all diesel fuel tank cleaning and inspections. Which fuel tanks will be subjected to UT of the tank bottom? What will be the extent of UT of tank bottoms (grid size)? Provide a list of specific fuel tanks (if any) that will not be subjected to periodic cleaning and visual inspection or UT. Provide a justification for not verifying that loss of material is occurring in fuel tanks that are not subjected to cleaning and visual inspection or UT.