ML20344A029
| ML20344A029 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 12/07/2020 |
| From: | Herr M Exelon Generation Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| CCN 20-83 | |
| Download: ML20344A029 (2) | |
Text
Exelon Generation CCN 20-83 December 07, 2020 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Peach Bottom Atomic Power Station, Unit 2 and Unit 3 Subsequent Renewed Facility Operating License No. DPR-44 and DPR-56 NRC Docket No. 50-277 and 50-278
Subject:
Deviation from BWR Vessel and Internals Project (BWRVIP) Guidelines -
Deferring Flaw Re-inspections for One Cycle
Reference:
- 1) "BWRVIP-18, Revision 2-A: BWR Vessel and Internals Project, BWR Core Spray Internals Inspection and Flaw Evaluation Guidelines," EPRI Technical Report 3002008089, August 2016
- 2) "BWRVIP-41, Revision 4-A: BWR Vessel and Internals Project, BWR Jet Pump Assembly Inspection and Flaw Evaluation Guidelines," EPRI Technical Report 3002014254, December 2018
- 3) "BWRVIP-94NP, Revision 3: BWR Vessel and Internals Project, Program Implementation Guide, EPRI Technical Report 3002013101, September 2018 Exelon Generation Company, LLC (EGC) is a member of the BWR Vessel and Internals Project (BWRVIP) and has committed to implementing BWRVIP products and to providing notification to the NRC staff if an applicable aspect of a BWRVIP product will not be implemented.
BWRVIP-18, Revision 2-A (Reference 1) and BWRVIP-41, Revision 4-A (Reference 2) require re-inspection of flawed welds based on a structural evaluation of the flawed condition. This requirement is classified as a "needed" requirement.
A Deviation Disposition was prepared in accordance with BWRVIP-94NP, Revision 3 (Reference 3). The Deviation Disposition contains an evaluation documenting the acceptability of not re-inspecting three flawed locations for one fuel cycle. Two of the flawed locations are in Unit 2 with one at a core spray piping weld and the other at a jet pump weld. The third flaw location is at Unit 3 and is at a jet pump weld location. Acceptability is based on conservatisms in the flaw evaluations, particularly for all three locations, the flaws have not experienced any growth based on multiple inspections.
This letter is being transmitted for your information in accordance with Section 3.5 of BWRVIP-94NP Revision 3. This letter is to notify the NRC of the deviation from "needed" BWRVIP guidance. No actions or approvals on the part of the NRC are required as a result of this letter.
CCN 20-83 U. S. Nuclear Regulatory Commission Page 2 There are no regulatory commitments contained in this letter. Should you have any questions, please contact Randal J. Schmidt at (610) 765-5236.
Respectfully, Mr::::::!l!,r L_
Site Vice President Peach Bottom Atomic Power Station cc:
Regional Administrator - NRC Region 1 NRC Senior Resident Inspector - Peach Bottom Atomic Power Station