ML092170713
| ML092170713 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 08/05/2009 |
| From: | Kalyanam N Plant Licensing Branch IV |
| To: | Clark R Entergy Operations |
| Kalyanam N, NRR/DORL/LPL4, 415-1480 | |
| References | |
| ANO1-ISI-015, ANO1-ISI-016, ANO1-ISI-017, ANO1-ISI-018, ANO1-ISI-019, ANO1-ISI-020, TAC ME1439, TAC ME1440, TAC ME1441, TAC ME1442, TAC ME1443, TAC ME1444 | |
| Download: ML092170713 (3) | |
Text
From:
Kalyanam, Kaly Sent:
Wednesday, August 05, 2009 3:48 PM To:
CLARK, ROBERT W
Subject:
RAI on Relief Requests for Limited Exams during Third 10-Year Interval (TAC Nos.
ME1439, 1440, 1441, 1442, 1443, and 1444)
REQUEST FOR ADDITIONAL INFORMATION ON THE THIRD TEN YEAR 10-YEAR INSERVICE INSPECTION INTERVAL REQUESTS FOR RELIEF ENTERGY OPERATIONS, INC ARKANSAS NUCLEAR ONE, UNIT 1 DOCKET NUMBER: 50-313 TAC Nos. ME1439, ME1440, ME1441, ME1442, ME1443, and ME1444 1.0 SCOPE By letter dated May 29, 2009, (Agencywide Documents Access & Management System (ADAMS) ML091520610), Entergy Operations, Inc. (the licensee), submitted its Third 10-Year Inservice Inspection (ISI) Interval Requests for Relief (RR) ANO1-ISI-015, ANO1-ISI-016, ANO1-ISI-017, ANO1-ISI-018, ANO1-ISI-019, and ANO1-ISI-020 from the requirements of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code (ASME Code),
Section XI, for Arkansas Nuclear One, Unit 1 (ANO-1).
In accordance with Title 10 Code of Federal Regulations (10 CFR) 50.55a(g)(5)(iii), the licensee has submitted the subject requests for relief for limited examinations in multiple ASME Code Examination Categories. The ASME Code requires that 100% of the examination volumes, or surface areas, described in ASME Code,Section XI, Tables IWB-2500 and IWC-2500 be performed during each interval. The licensee stated that 100% of the ASME Code-required volumes, or surface areas, are impractical to obtain at ANO-1.
10 CFR 50.55a(g)(5)(iii) states that when licensees determine that conformance with ASME Code requirements are impractical at their facility, they shall submit information to support this determination. The Nuclear Regulatory Commission (NRC) will evaluate such requests based on impracticality, and may impose alternatives, giving due consideration to public safety and the burden imposed on the licensee. Based on the staffs Office Instruction LIC-109 Acceptance Review Procedures (ADAMS ML081200811) review, it was determined that additional information was required in order for the staff to begin its review of the licensees submittal dated May 29, 2009.
2,0 REQUEST FOR ADDITIONAL INFORMATION
- 1. General - Information Required on All Requests for Relief In most cases, the licensee has provided only general information regarding impracticality of obtaining ASME Code-required volumetric examination, as applicable. Statements such as
scanning obstructions and geometric surface conditions, design configurations, nozzle-to-head configuration, and due to transition of the nozzle adjacent to the weld toe are inadequate to explain the bases for not obtaining the ASME Code-required examination volumes. No sketches with dimensional information showing the causes of limited accessibility have been included.
The staff requests that the licensee submit detailed and specific information to support the bases for limited examination in all requests for relief, and therefore, demonstrate impracticality. The licensee shall:
a) Include descriptions (written and/or sketches, as necessary) of the interferences to applied nondestructive examination (NDE) techniques.
b) As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.
c) Fully clarify the wave modality and insonification angles used for all ultrasonic examinations.
d) Show cross-sectional coverage plots to describe ASME Code volumes examined.
e) If surface examination is required by the ASME Code in addition to the volumetric examination, state whether surface examinations were performed on any of the subject components and state examination coverage that was obtained.
f)
If not included, state whether any indications were discovered as a result of Code-required examinations, and how these indications have been dispositioned.