ML13100A247
| ML13100A247 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 04/10/2013 |
| From: | Kalyanam K Plant Licensing Branch IV |
| To: | Clark R Entergy Operations |
| Kalyanam N | |
| References | |
| TAC ME9148 | |
| Download: ML13100A247 (2) | |
Text
From:
Kalyanam, Kaly To:
CLARK, ROBERT W Cc:
Lent, Susan; Burkhardt, Janet
Subject:
RAI on Request for Relief No. AN01-ISI-022 TAC NO. ME9148 Date:
Wednesday, April 10, 2013 1:07:16 PM The SUNSI information:
Plant: Arkansas Nuclear One, Unit 1 Docket No.: 50/313
Subject:
RAI on Request for Relief No. AN01-ISI-022 TAC NO. ME9148 SUNSI Review Done: Yes. Not Publicly Available, Normal Release, Non-sensitive, From: N. Kalyanam To: Robert Clark R. Clark:
By letter dated July 25, 2012, Entergy Operations, Inc., submitted proposed alternative AN01-ISI-022 requesting for Relief from American Society of Mechanical Engineers (ASME)Section XI Volumetric Examination Requirements, Fourth 10-Year Interval, First Period. The NRC has reviewed the information submitted by the licensee and determined the following additional information is required to complete the evaluation.
Entergy is requested to provide the response to this request within 60 days of the receipt of this e-mail.
Thanks Kaly
REQUEST FOR ADDITIONAL INFORMATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELIEF REQUEST NO. ANO1-ISI-022 ENTERGY OPERATIONS, INCORPORATED ARKANSAS NUCLEAR ONE, UNIT 1 DOCKET NO. 50-313 (TAC NO. ME9148)
By letter dated July 25, 2012, (Agency Wide Document Access and Management
System (ADAMS) accession number ML12207A594) Entergy Operation Incorporated (the licensee) submitted relief request ANO1-ISI-022. The licensee has requested relief from the weld examination coverage requirements specified in American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code,Section XI, 2001 Edition through the 2003 Addenda, for obtaining essentially 100 percent coverage for two welds.
The U.S. Nuclear Regulatory Commission (NRC) staff requests that Entrtgy provide additional information to support the relief from ASME Code Section XI-required volumetric examination of essentially 100 percent of the two full-penetration welds.
- 1. In order to know the safety significance of the weld the NRC staff need to know which systems would be affected by a leak or failure of the welds. Please describe the locations of the welds and systems in which the welds are located.
- 2. The sizes of the welds are important in determining the safety significance of a leak or failure of the welds. Please provide the weld diameters and thicknesses.
- 3. What are the materials of construction of the piping and what are the weld metals?
- 4. The choice of welds for inspection was guided by the plants risk informed ISI program. Were additional welds in the same risk segment inspected to make up for the missed weld volume? Are there other welds within the same system(s), subject to the same degradation mechanisms that will allow for essentially 100 percent coverage that can be substituted for these welds? If so, will this be done in the next inspection interval