ML082170505
| ML082170505 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 08/11/2008 |
| From: | Markley M NRC/NRR/ADRO/DORL/LPLIV |
| To: | Edington R Arizona Public Service Co |
| Markley, M T, NRR/DORL/LP4, 301-415-5723 | |
| References | |
| TAC MD8330 | |
| Download: ML082170505 (4) | |
Text
August 11, 2008 Mr. Randall K. Edington Executive Vice President Nuclear/CNO Mail Station 7602 Arizona Public Service Company P. O. Box 52034 Phoenix, AZ 85072-2034
SUBJECT:
PALO VERDE NUCLEAR GENERATING STATION, UNIT 1 - REQUEST FOR ADDITIONAL INFORMATION RE: REQUEST FOR TEMPORARY EXEMPTION FROM 10 CFR 50.46 AND 10 CFR 50, APPENDIX K FOR LEAD FUEL ASSEMBLIES (TAC NO. MD8330)
Dear Mr. Edington:
By letter dated March 8, 2008 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML080790524), Arizona Public Service Company (APS, the licensee) submitted a request for temporary exemption from the requirements Section 50.46, Acceptance criteria for emergency core cooling systems [ECCS] for light-water nuclear power reactors, of Title 10 of the Code of Federal Regulations (10 CFR) and Appendix K, ECCS Evaluation Models, to 10 CFR 50, in order to use lead fuel assemblies in Palo Verde Nuclear Generating Station, Unit 1.
The Nuclear Regulatory Commission (NRC) staff has reviewed the information provided and determined that additional information is required in order to complete the evaluation. As discussed with Russell Stroud of your staff, the NRC staff is requesting a response within 30 days of the date of this letter.
If you have any questions, please contact me at 301-415-5723.
Sincerely,
/RA/
Michael T. Markley, Senior Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. STN 50-528
Enclosure:
Request for Additional Information cc w/encl: See next page
Mr. Randall K. Edington Executive Vice President Nuclear/CNO Mail Station 7602 Arizona Public Service Company P. O. Box 52034 Phoenix, AZ 85072-2034
SUBJECT:
PALO VERDE NUCLEAR GENERATING STATION, UNIT 1 - REQUEST FOR ADDITIONAL INFORMATION RE: REQUEST FOR TEMPORARY EXEMPTION FROM 10 CFR 50.46 AND 10 CFR 50, APPENDIX K FOR LEAD FUEL ASSEMBLIES (TAC NO. MD8330)
Dear Mr. Edington:
By letter dated March 8, 2008 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML080790524), Arizona Public Service Company (APS, the licensee) submitted a request for temporary exemption from the requirements Section 50.46, Acceptance criteria for emergency core cooling systems [ECCS] for light-water nuclear power reactors, of Title 10 of the Code of Federal Regulations (10 CFR) and Appendix K, ECCS Evaluation Models, to 10 CFR 50, in order to use lead fuel assemblies in Palo Verde Nuclear Generating Station, Unit 1.
The Nuclear Regulatory Commission (NRC) staff has reviewed the information provided and determined that additional information is required in order to complete the evaluation. As discussed with Russell Stroud of your staff, the NRC staff is requesting a response within 30 days of the date of this letter.
If you have any questions, please contact me at 301-415-5723.
Sincerely,
/RA/
Michael T. Markley, Senior Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. STN 50-528
Enclosure:
Request for Additional Information cc w/encl: See next page DISTRIBUTION:
PUBLIC LPLIV Reading RidsAcrsAcnwMailCTR Resource ResourceRidsNrrDorlDpr Resource RidsNrrDorlLpl4 Resource RidsNrrDssSrxb Resource RidsNrrPMMMarkley Resource RidsNrrLAJBurkhardt Resource RidsOgcRp Resource RidsRgn4MailCenter Resource THuang, NRR/DSS/SRXB PClifford, NRR/DSS/SRXB ADAMS Accession No. ML082170505
(*) RAI input memo OFFICIAL AGENCY RECORD OFFICE NRR/LPL4/PM NRR/LPL4/LA NRR/DSS/SRXB NRR/LPL4/BC (A)
NRR/LPL4/PM NAME MMarkley JBurkhardt GCranston (*)
JDonohew MMarkley /Jack Donohew for DATE 8/5/058 8/5/08 7/29/08 8/11/08 8/11/08
Palo Verde Nuclear Generating Station 7/2/2008 cc:
Mr. Steve Olea Arizona Corporation Commission 1200 W. Washington Street Phoenix, AZ 85007 Mr. Douglas Kent Porter Senior Counsel Southern California Edison Company Law Department, Generation Resources P.O. Box 800 Rosemead, CA 91770 Senior Resident Inspector U.S. Nuclear Regulatory Commission P.O. Box 40 Buckeye, AZ 85326 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 612 E. Lamar Blvd., Suite 400 Arlington, TX 76011-4125 Chairman Maricopa County Board of Supervisors 301 W. Jefferson, 10th Floor Phoenix, AZ 85003 Mr. Aubrey V. Godwin, Director Arizona Radiation Regulatory Agency 4814 S. 40th Street Phoenix, AZ 85040 Mr. Scott Bauer, Director Regulatory Affairs Palo Verde Nuclear Generating Station Mail Station 7636 P.O. Box 52034 Phoenix, AZ 85072-2034 Mr. Dwight C. Mims, Vice President Regulatory Affairs and Plant Improvement Palo Verde Nuclear Generating Station Mail Station 7605 P.O. Box 52034 Phoenix, AZ 85072-2034 Mr. John C. Taylor Director, Nuclear Generation El Paso Electric Company 340 E. Palm Lane, Suite 310 Phoenix, AZ 85004 Mr. James Ray Public Service Company of New Mexico 2401 Aztec NE, MS Z110 Albuquerque, NM 87107-4224 Mr. Geoffrey M. Cook Southern California Edison Company 5000 Pacific Coast Hwy., Bldg. D21 San Clemente, CA 92672 Mr. Robert Henry Salt River Project 6504 E. Thomas Road Scottsdale, AZ 85251 Mr. Jeffrey T. Weikert Assistant General Counsel El Paso Electric Company Mail Location 167 123 W. Mills El Paso, TX 79901 Mr. Eric Tharp Los Angeles Department of Water & Power Southern California Public Power Authority P.O. Box 51111, Room 1255-C Los Angeles, CA 90051-0100 Mr. Brian Almon Public Utility Commission William B. Travis Building P.O. Box 13326 1701 N. Congress Avenue Austin, TX 78701-3326 Ms. Karen O'Regan Environmental Program Manager City of Phoenix Office of Environmental Programs 200 W. Washington Street Phoenix, AZ 85003
REQUEST FOR ADDITIONAL INFORMATION ARIZONA PUBLIC SERVICE COMPANY, ET. AL.
PALO VERDE NUCLEAR GENERATING STATION, UNIT 1 DOCKET NO. STN 50-528 By letter dated March 8, 2008 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML080790524), Arizona Public Service Company (APS, the licensee) submitted a request for temporary exemption from the requirements Section 50.46, Acceptance criteria for emergency core cooling systems [ECCS] for light-water nuclear power reactors, of Title 10 of the Code of Federal Regulations (10 CFR) and Appendix K, ECCS Evaluation Models, to 10 CFR 50, in order to use lead fuel assemblies (LFAs) in Palo Verde Nuclear Generating Station (Palo Verde), Unit 1.
The U.S. Nuclear Regulatory Commission (NRC) staff has reviewed the information provided and determined that the following additional information is required in order to complete the evaluation:
- 1.
The proposed temporary exemption will allow up to eight LFAs manufactured by AREVA NP with fuel rods with M5 to be inserted into the Palo Verde Unit 1 core in non-limiting locations. The LFAs are scheduled for use in three operating cycles of irradiation for Palo Verde Unit 1 (Cycles 15, 16, and 17). Please provide: (1) the analyses and methodologies used to identify the locations of the non-limiting locations; (2) the criteria and the key parameters used to determine the non-limiting locations; and (3) justification for the applicability of analyses for Cycle 15 to future Cycles 16 and 17 with respect to the analytic methods, key parameters, and non-limiting locations.
- 2.
Please provide clarification in terms of key parameters that: (1) the ECCS performance would not be adversely affected due to the similarities in the material properties of the M5 alloy to Zircaloy or ZIRLO and the location of LFAs in non-limiting locations; and (2) the application of the Baker-Just equation will continue to bound all post-LOCA scenarios for M5 alloy conservatively.
- 3.
Please describe the joint effort with respect to roles to be played between APS, AREVA, and Westinghouse for evaluations: (1) to verify performance of the LFAs with respect to the safety analysis such as thermal-hydraulic compatibility, loss-of-coolant accident (LOCA) and non-LOCA criteria, mechanical design, seismic and core physics; and (2) to verify the insertion of the AREVA LFAs does not adversely impact the fuel performance and mechanical integrity of the co-resident fuel.
- 4.
It appears that Commitments 4, 5, and 6 (attached to the Palo Verde application dated March 8, 2008) will be completed by October 30, 2008. Please describe methodologies and data used to evaluate the Palo Verde core physics models, thermal-hydraulic/neutronic compatibility, and impact on the co-resident fuels with respect to insertion of the AREVA LFAs.
Enclosure