L-22-124, Response to Request for Additional Information Regarding License Amendment Request to Revise the Design Basis for the Shield Building
| ML22132A196 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  (NPF-003) |
| Issue date: | 05/12/2022 |
| From: | Tony Brown Energy Harbor Nuclear Corp |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| EPID L-2022-LLA-0003, L-22-124 | |
| Download: ML22132A196 (3) | |
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harbor Terry J. Brown Site Vice President, Davis-Besse Nuclear May 12, 2022 L-22-124 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001
Subject:
Davis-Besse Nuclear Power Station Docket No. 50-346, License No. NPF-3 Energy Harbor Nuclear Corp.
Davis-Besse Nuclear Power Station.
5501 N. State Route 2 Oak Harbor, Ohio 43449 419-321-7676 10 CFR 50.90 Response to Request for Additional Information Regarding License Amendment Request to Revise the Design Basis for the Shield Building (EPID L-2022-LLA-0003)
By letter dated January 3, 2022 (Agencywide Document Access and Management System (ADAMS) Accession Number ML22003A147), Energy Harbor Nuclear Corp.
submitted a license amendment request for Davis-Besse Nuclear Power Station, Unit No. 1. The proposed amendment would change the design basis for the facility to allow laminar concrete cracking of a limited width in the outer reinforcement layer of the shield building containment structure.
By electronic mail dated April 22, 2022, the Nuclear Regulatory Commission (NRC) staff issued a request for additional information (RAI) to support the review of the proposed change. The Energy Harbor Nuclear Corp. RAI response is attached.
There are no regulatory commitments contained in this submittal. If there are any questions or if additional information is required, please contact Mr. Phil H. Lashley, Manager - Fleet Licensing, at (330) 696-7208.
I declare under penalty of perjury that the foregoing is true and correct. Executed on May 12, 2022.
Davis-Besse Nuclear Power Station L-22-124 Page 2
Attachment:
Response to Request for Additional Information cc: NRC Region III Administrator NRC Resident Inspector NRC Project Manager Executive Director, Ohio Emergency Management Agency, State of Ohio (NRC Liaison)
Utility Radiological Safety Board
Attachment L-22-124 Response to Request for Additional Information Regarding License Amendment Request to Revise the Design Basis for the Shield Building Page 1 of 1 By letter dated January 3, 2022 (Agencywide Document Access and Management System (ADAMS) Accession Number ML22003A147), Energy Harbor Nuclear Corp.
submitted a license amendment request for Davis-Besse Nuclear Power Station, Unit No. 1. The proposed amendment would change the design basis for the facility to allow laminar concrete cracking of a limited width in the outer reinforcement layer of the shield building containment structure. By electronic mail dated April 22, 2022, the Nuclear Regulatory Commission (NRC) staff issued a request for additional information (RAI) to support the review of the proposed change. The requested information is provided below. The RAI is presented in bold font, followed by the Energy Harbor Nuclear Corp.
response.
RAI-1
Clarify what measures were put in place to verify the adequacy of the design inputs and testing used to reach the safety conclusions regarding the proposed changes to the shield building design basis.
Response
Details on the measures put in place to verify the adequacy of the design inputs and testing are included in Bechtel Power Corporation Technical Report, 25884-000-30R-C01R-00002, Appendix A for Phase I, Appendix B for Phase II, and Appendix C for Phase III. Phase I and II were performed under Bechtel Quality Assurance/ Quality Control (QA/QC) oversight under their 10 CFR 50, Appendix B program. This included subject matter expert review and approval of test procedures, calibration/certification of equipment, verification of materials (Certified Mill Test Reports and Concrete Mix documentation), and post-testing evaluation. Phase III provided similar verification measures, but as it was exploratory/non-safety, full QA/QC requirements were not required. However, based on the measures taken and the consistency of results, the Phase III was included as alternate and confirmatory test data.