ML100700336
| ML100700336 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 03/12/2010 |
| From: | Hall J Plant Licensing Branch IV |
| To: | Edington R Arizona Public Service Co |
| Hall, J R, NRR/DORL/LPL4, 301-415-4032 | |
| References | |
| TAC ME1607 | |
| Download: ML100700336 (3) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555*0001 March 12, 2010 Mr. Randall K. Edington Executive Vice President Nuclear/
Chief Nuclear Officer Mail Station 7602 Arizona Public Service Company P.O. Box 52034 Phoenix, AZ. 85072-2034
SUBJECT:
PALO VERDE NUCLEAR GENERATING STATION, UNIT 1 - REVIEW OF THE 2008 STEAM GENERATOR TUBE INSERVICE INSPECTIONS DURING REFUELING OUTAGE 14 (TAC NO. ME1607)
Dear Mr. Edington:
By letter dated May 8, 2009 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML091400182), Arizona Public Service Company (the licensee),
submitted the results of its 2008 steam generator tube inspections performed during Refueling Outage 14 at Palo Verde Nuclear Generating Station Unit 1 (PVNGS 1).
The U.S. Nuclear Regulatory Commission staff has completed its review of this letter and concludes that the licensee provided the information required by the PVNGS 1 technical specifications. No additional follow-up is required at this time. The staff's review is enclosed. If you have any questions, please contact me at (301) 415-4032 or via e-mail at randy.hall@nrc.gov.
Sincerely,
~tJLU-I. 71Jj
~s R. Hall, Senior Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. STN 50-528
Enclosure:
As stated cc w/encl: Distribution via Listserv
STAFF EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO RESULTS OF STEAM GENERATOR TUBE INSPECTION PERFORMED DURING REFUELING OUTAGE 14 PALO VERDE NUCLEAR GENERATION STATION, UNIT 1 DOCKET NO. STN 50-528 By letter dated May 8, 2009 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML091400182), Arizona Public Service Company (the licensee),
submitted the results of its 2008 steam generator (SG) tube inspections performed during Refueling Outage 14 at Palo Verde Nuclear Generating Station, Unit 1 (PVNGS 1).
PVNGS 1 has two SGs. There are 12,580 thermally-treated Alloy 690 tubes in each SG. The tubes have an outside diameter of 0.75 inches and a wall thickness of 0.042 inches. Ferritic stainless steel egg-crate tube supports, diagonal bars, and vertical straps support the tubes at various locations.
The licensee provided the scope, extent, methods, and results of its SG tube inspections in the document referenced above. In addition, the licensee described corrective actions (Le., tube plugging) taken in response to the inspection findings. The tubes in both SGs were inspected during this outage.
The 2008 refueling outage is the second examination performed on the Unit 1 SGs following replacement in Refueling Outage 12. The only degradation observed during the inspections was wear.
Based on a review of the information provided, the Nuclear Regulatory Commission staff concludes that the licensee provided the information required by the PVNGS 1 Technical Specifications. In addition, the staff concludes that there are no technical issues that warrant follow-up action at this time, since the inspections appear to be consistent with the objective of detecting potential tube degradation and the inspection results appear to be consistent with industry operating experience at similarly designed and operated units.
Enclosure
March 12, 2010 Mr. Randall K. Edington Executive Vice President Nuclear/
Chief Nuclear Officer Mail Station 7602 Arizona Public Service Company P. O. Box 52034 Phoenix, AZ. 85072-2034
SUBJECT:
PALO VERDE NUCLEAR GENERATING STATION, UNIT 1 - REVIEW OF THE 2008 STEAM GENERATOR TUBE INSERVICE INSPECTIONS DURING REFUELING OUTAGE 14 (TAC NO. ME1607)
Dear Mr. Edington:
By letter dated May 8, 2009 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML091400182), Arizona Public Service Company (the licensee),
submitted the results of its 2008 steam generator tube inspections performed during Refueling Outage 14 at Palo Verde Nuclear Generating Station Unit 1 (PVNGS 1).
The U.S. Nuclear Regulatory Commission staff has completed its review of this letter and concludes that the licensee provided the information required by the PVNGS 1 technical specifications. No additional follow-up is required at this time. The staff's review is enclosed. If you have any questions, please contact me at (301) 415-4032 or via e-mail at randy.hall@nrc.gov.
Sincerely,
/RA!
James R. Hall, Senior Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. STN 50-528
Enclosure:
As stated cc w/encl: Distribution via Listserv DISTRIBUTION:
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