ML023120447
| ML023120447 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 11/08/2002 |
| From: | Joseph Colaccino NRC/NRR/DLPM/LPD2 |
| To: | Luker I Southern Nuclear Operating Co |
| Colaccino J, NRR/DLPM, 415-2753 | |
| References | |
| TAC MB5009, TAC MB5010 | |
| Download: ML023120447 (3) | |
Text
From:
Joseph Colaccino To:
INTERNet:ifluker@southernco.com Date:
11/8/02 10:32AM
Subject:
RAI: Hatch Relief Request RR-34, Revision 1, and RR-37 Ira Luker, Attached is the staffs request for additional information on Hatch Relief Requests RR-34, Revision 1, and RR-37, submitted to the NRC in a letter dated May 3, 2002. The questions concern the proposed alternatives to use enhanced visual testing examinations in lieu of the ASME Section XI Code-required ultrasonic testing examinations of the reactor pressure vessel inner nozzle radius sections.
Please let me know if you have any questions.
Joe Colaccino, NRC Hatch Project Manager 301-415-2753 CC:
Donald Naujock; John Nakoski
November 8, 2002 Request for Additional Information Hatch Relief Request RR-34, Revision 1, and RR-37 Submittal Dated May 3, 2002 NRC TAC Nos. MB5009 and MB5010 Hatch proposed alternatives to use enhanced visual testing (VT) examinations in lieu of the ASME Section XI Code-required ultrasonic testing (UT) examinations of the reactor pressure vessel (RPV) inner nozzle radius sections. Unless otherwise specified, the following questions apply to both RR-34, Revision 1, and RR-37.
- 1. Provide a list/table of the nozzles, nozzle sizes, percent of coverage from prior examinations, and when (month/year) examined.
- 2. Discuss changes to examination coverage as a result of using VT (% surface) in lieu of the UT (% volume).
- 3. Identify the ASME Code Inservice Inspection Program: either A or B. Reference the appropriate IWB-2500-1 item number: either B3.20 or B3.100.
- 4. Discuss any changes in radiation exposure to personnel as a result of the change in examination method.
- 5. Provide a technical discussion that supports structural integrity, such as the Oak Ridge report mentioned in RR-37. Provide sufficient data for third party retrieval of the Oak Ridge report.
- 6. Describe the direct/enhanced visual examination systems and the resolution sensitivity that will be used during the examinations. Discuss how the 1-mil (0.001 inch) resolution sensitivity will be demonstrated for each system. Provide the same for the remote enhanced visual examination systems.
- 7. Provide a description for the performance of the proposed enhanced direct visual examination of the RPV nozzles that will assure a 1-mil resolution.
- 8. For each unit, provide the appropriate Code edition of the ASME Section XI, current inservice inspection (ISI) interval, and when the current ISI interval is over.
- 9. For RR-37, discuss the obstructions for each nozzle or group of nozzles that limit full coverage.
- 10. For RR-37, if leak-before-break is part of the bases for structural integrity of the vessel, provide the supporting technical justification.
Mail Envelope Properties (3DCBD926.1B2 : 2 : 19651)
Subject:
RAI: Hatch Relief Request RR-34, Revision 1, and RR-37 Creation Date:
11/8/02 10:32AM From:
Joseph Colaccino Created By:
JXC1@nrc.gov Recipients Action Date & Time southernco.com Transferred 11/08/02 10:33AM ifluker (INTERNet:ifluker@southernco.com) nrc.gov owf2_po.OWFN_DO Delivered 11/08/02 10:33AM DGN CC (Donald Naujock)
Opened 11/08/02 11:21AM nrc.gov owf4_po.OWFN_DO Delivered 11/08/02 10:32AM JAN1 CC (John Nakoski)
Opened 11/08/02 12:10PM Post Office Delivered Route southernco.com INTERNet owf2_po.OWFN_DO 11/08/02 10:33AM nrc.gov owf4_po.OWFN_DO 11/08/02 10:32AM nrc.gov Files Size Date & Time Hatch RR34R1 and RR37 RAIs.wpd 3616 11/08/02 10:18AM MESSAGE 1177 11/08/02 10:32AM Options Auto Delete:
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