ML100850467
| ML100850467 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 03/26/2010 |
| From: | Hall J Plant Licensing Branch IV |
| To: | Stroud R Arizona Public Service Co |
| Hall, J R, NRR/DORL/LPL4, 301-415-4032 | |
| References | |
| TAC ME2335, TAC ME2336 | |
| Download: ML100850467 (1) | |
Text
ENCLOSURE DRAFT REQUEST FOR ADDITIONAL INFORMATION ARIZONA PUBLIC SERVICE COMPANY, ET. AL.
PALO VERDE NUCLEAR GENERATING STATION, UNITS 2 and 3 DOCKET NOS. STN 50-529 AND STN 50-530 REQUEST FOR RELIEF NO. 44 TAC NOS. ME2335 AND ME2336 By letter dated September 29, 2009, Arizona Public Service Company (the licensee), submitted relief request number 44 (RR No. 44), pursuant to paragraph 50.55a(a)(3)(ii) of Title 10 of The Code of Federal Regulations (10 CFR). RR No. 44 proposes to defer certain visual examinations required by the American Society of Mechanical Engineers Boiler and Pressure Vessel Code (ASME Code),Section XI, Table IWB-2500-1, Examination Categories B-N-2 and B-N-3 for the Palo Verde Nuclear Generating Station, Units 2 and 3 (Palo Verde 2 and 3). The visual exams for which relief is requested are for reactor internals components, including the interior attachments beyond the beltline region and the core support structure. The licensee has specifically requested to defer these visual examinations until the years 2027 for Palo Verde 2 and 2028 for Palo Verde 3.
The U.S. Nuclear Regulatory Commission (NRC) staff requests that the licensee provide additional information to support the requested deferral of the visual examinations of the subject components, as follows:
The licensee stated in RR No. 44 that the visual examinations for these components were last performed in 2008 for Palo Verde 2, and in 2009 for Palo Verde 3, with acceptable results.
Please discuss whether any relevant indications were found during these examinations. If any indications were found during these examinations, please describe how these indications were evaluated and dispositioned, in accordance with ASME Code,Section XI requirements.