ML082130609
| ML082130609 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 08/04/2008 |
| 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 MD7759 | |
| Download: ML082130609 (4) | |
Text
August 4, 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 REGARDING THE 2007 STEAM GENERATOR TUBE INSPECTIONS (TAC NO. MD7759)
Dear Mr. Edington:
By letter dated January 2, 2008 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML080090193), Arizona Public Service Company (APS, the licensee) submitted information pertaining to its 2007 steam generator tube inspections at the Palo Verde Nuclear Generating Station, Unit 1. These inspections were performed during the 13th refueling outage of 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 Robert Roehler of your staff, the NRC staff is requesting a response within 60 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 REGARDING THE 2007 STEAM GENERATOR TUBE INSPECTIONS (TAC NO. MD7759)
Dear Mr. Edington:
By letter dated January 2, 2008 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML080090193), Arizona Public Service Company (APS, the licensee) submitted information pertaining to its 2007 steam generator tube inspections at the Palo Verde Nuclear Generating Station, Unit 1. These inspections were performed during the 13th refueling outage of 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 Robert Roehler of your staff, the NRC staff is requesting a response within 60 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 r/f RidsAcrsAcnw_MailCTR Resource RidsNrrDorlDpr Resource RidsNrrDciCsgb Resource RidsNrrDorlLpl4 Resource RidsNrrPMMMarkley Resource RidsNrrLAJBurkhardt Resource RidsOgcRp Resource RidsRgn4MailCenter Resource AJohnson, NRR/DCI/CSGB KKarwoski, NRR/DCI/CSGB ADAMS Accession No.: ML082130609
(*) RAI input memo OFFICE NRR/LPL4/PM NRR/LPL4/LA NRR/DCI/CSGB NRR/LPL4/BC (A)
NRR/LPL4/PM NAME MMarkley JBurkhardt AHiser (*)
MThadani MMarkley DATE 8/1/08 8/1/08 8/1/08 8/01/08 8/04/08 OFFICIAL AGENCY RECORD
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 January 2, 2008 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML080090193), Arizona Public Service Company (APS, the licensee) submitted information pertaining to its 2007 steam generator (SG) tube inspections at the Palo Verde Nuclear Generating Station, Unit 1. These inspections were performed during the 13th refueling outage of 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.
Please indicate whether the Unit 1 SG design is the same as the Unit 2 SG design. If the Unit 1 SG design is different, please discuss any differences in the design (e.g., number of tubes, nominal tube diameter and wall thickness, tube spacing, etc.
- 2.
The Unit 2 SGs had several tubes affected by wear in the Stay Cylinder region, yet this inspection report indicates that very little wear was observed on tubing in either SG 11 or SG 12. Please discuss any insights regarding potential differences in performance.
- 3.
The plugging history indicates that over 50 tubes were plugged in each SG during the baseline inspection in 2005. Please summarize the reasons for plugging these tubes.
- 4.
In addition, please discuss the scope and results of any inspections performed in the Unit 1 SGs (during the baseline or first inservice inspection) to address the postulated packaging screw damage of the Unit 2 SGs.
- 5.
Please discuss the scope and results of any secondary side inspections, other than the foreign object search and retrieval inspections already addressed in this inspection report.
Enclosure
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