ML101260337
| ML101260337 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 05/06/2010 |
| From: | Hall J Plant Licensing Branch IV |
| To: | Stroud R Arizona Public Service Co |
| Hall, J R, NRR/DORL/LPL4, 301-415-4032 | |
| Shared Package | |
| ML101260227 | List: |
| References | |
| TAC ME3052 | |
| Download: ML101260337 (1) | |
Text
DRAFT REQUEST FOR ADDITIONAL INFORMATION ARIZONA PUBLIC SERVICE COMPANY, ET. AL.
PALO VERDE NUCLEAR GENERATING STATION, UNIT 3 DOCKET NO. STN 50-530 REQUEST FOR RELIEF NO. 47 TAC NO. ME3052 By letter dated December 21, 2009, Arizona Public Service Company (the licensee),
submitted Relief Request No. 47 (RR 47), for the second 10-year inservice inspection (ISI) interval for Palo Verde Nuclear Generating Station Unit 3, pursuant to paragraph 50.55a(g)(5)(iii) of Title 10 of The Code of Federal Regulations (10 CFR). The Nuclear Regulatory Commission staff has reviewed the information provided by the licensee, and has determined that additional information is necessary to complete its review of RR 47.
Based on the staff=s review, please provide a response which addresses the following questions.
- 1.
List the specific nozzle numbers and weld numbers for each reactor vessel nozzle-to-vessel weld for which relief is being requested in Relief Request No.
- 47.
- 2.
Identify the diameter and wall thickness of each nozzle and weld identified in response to Question 1.
- 3.
Identify the materials of construction of each nozzle and weld identified in Question 1.
- 4.
Identify all the nondestructive examination (NDE), including visual examinations, performed on each nozzle and weld identified in response to Question 1 during the units Second Inservice Inspection Interval. Identify the specific American Society of Mechanical Engineers Boiler and Pressure Vessel Code Sections and Appendices that each of the NDE tests were performed in accordance with and discuss when Performance Demonstration Initiative qualified techniques were used.
Include the results of all the NDE (i.e., whether any indication(s) of degradation were found) that was performed on each nozzle and weld and, with regard to ultrasonic inspections, identify the percent volume examined for each nozzle-to-vessel weld identified in response to Question 1 in each ultrasonic scan direction.