RS-06-131, Commitment Regarding Byron Station Relief Request I3R-08
| ML062580460 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 09/14/2006 |
| From: | Jury K Exelon Generation Co, Exelon Nuclear |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| RS-06-131 | |
| Download: ML062580460 (3) | |
Text
RS-06-131 September 14, 2006 U. S. Nuclear Regulatory Commission ATTN : Document Control Desk Washington, DC 20555-0001 Byron Station, Units 1 and 2 Facility Operating License Nos. NPF-37 and NPF-66 NRC Docket Nos. 50-454 and 50-455 Subject :
Commitment Regarding Byron Station Relief Request 13R-08 References :
(1)
Letter from D. M. Hoots (Exelon Generation Company, LLC) to U. S. NRC, "Td 10-Year Inservice Inspection Interval, Relief Request 13R-08, Preventive Weld Overlays on Pressurizer Spray, Relief, Safety and Surge Nozzles and Associated Alternative Repair Techniques," dated April 28, 2006 (2)
Letter from D. M. Hoots (Exelon Generation Company, LLC) to U. S. NRC, "Response to NRC Request for Additional Information to Byron Station Relief Request 13R-08," dated August 18, 2006 During the review of the Reference 1 and Reference 2 submittals, the NRC determined that a commitment to provide information on the results of the ultrasonic examinations of the Byron Station Unit 1 pressurizer overlays is required to obtain approval of Relief Request 13R-08 for Byron Station Unit 1.
In accordance with this request, Exelon Generation Company, LLC (EGC) is committing to provide the details of the ultrasonic examination results of the structural weld overlays on the Byron Station Unit I pressurizer spray, relief, safety and surge nozzle safe-ends to the NFIC within 14 days of the completion of the final ultrasonic examination. EGC will notify the NFIC Project Manager for Byron Station when the examination of the final structural weld overlay is complete.
September 14, 2006 U.S. Nuclear Regulatory Commission Page 2 The attachment to this letter provides the details of this EGC commitment.
Keith R. Jury Director, Licensing and Regulatory Affairs Generation Company, PLC uestions concerning this letter, please contact David Chrzanowski
Attachment:
Commitment Related to Byron Station Relief Request 13R-08
Exelon Generation Company, LLC (EGC) Commitment Related to Byron Station Relief Request 13R-08 recording criteria of the ultrasonic examination procedure to be used for the examination of the Byron Station Unit 1 pressurizer overlays (PDI-UT-8, Revision F) requires that all indications, regardless of amplitude, be investigated to the extent necessary to provide accurate characterization, identity, and location. Additionally, the procedure requires that all indications, regardless of amplitude, that cannot be clearly attributed to the geometry of the overlay configuration be considered flaw indications.
' Ultrasonic examination procedure PDI-UT-8, Revision F requires that all suspected flaw indications are to be plotted on a cross sectional drawing of the weld and that the plots should accurately identify the specific origin of the reflector.
COMMITTED DATE ~ COMMITMENT TYPE COMMITMENT OR "OUTAGE" ONE-TIME PROGRAMMATIC ACTION ACTION
{Yes/No)
EGC commits to providing the results of the ultrasonic examination of the structural weld overlays on the Byron Station Unit 1 pressurizer spray, relief, safety and surge Within 14 days after Yes No nozzle safe-ends to the NRC the completion of the (6 locations total).
last ultrasonic examination of the The results will include:
weld overlays during
" a listing of indications detected,'
the Fall 2006 Byron
" the disposition of all indications Station Unit 1 using the standards of ASME refueling outage Section X1, IWB-3514-2 and/or (B1 R14).
IWB-3514-3 criteria and, if
- possible, the type and nature of the indications 2 Also included in the results will be a discussion of any repairs to the overlay material and/or base metal and the reason for the repair.
Subsequent Inservice examination of the structural weld overlays on pressurizer will be in accordance with ASME Section X1, Appendix Q, Q-4300