Document: NRC Regulatory Guide
Document ID: 12d6ebda-d515-49c2-b332-a2a2ef5aba3d
Document Type: regulatory_guide
Title: Guidance for Changes During Construction for New Nuclear Power Plants Being Constructed Under a Combined License Referencing a Certified Design Under 10 CFR Part 52 + HISTORY - HISTORY 04/2020 – DG-1321 , Proposed Revision 0
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1934/ML19340B290.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.237
CFR Part: 
CFR Title: 

Content:
sion@omb.eop.gov. Public Protection Notification The NRC may not conduct or sponsor, and a person is not required to respond to, a collection of information unless the document requesting or requiring the collection displays a currently valid OMB control number. DG-1321, Page 4 B. DISCUSSION Reasons for Issuance The NRC is issuing this RG to provide clarity and consistency on the timing of proposed changes to or departures from the design of SSCs of a facility, as described in the FSAR, as updated, being constructed under a COL covered by 10 CFR 52.98(b) and (c). Specifically, this RG addresses the timing of such proposed changes to or departures from the design, as described in the FSAR, as updated, before the Commission has made a finding under 10 CFR 52.103(g), and the timing of submission of such changes to the NRC for regulatory review. This guidance includes the timing of the beginning of construction of SSCs in accordance with proposed departures from the facility design described in the referenced certified design. Changes or departures from the design described in the FSAR, as updated, include both those within the scope of the standard certified design (and described in the “plant-specific design control document (DCD)” as defined in Section VIII of 10 CFR Part 52, Appendices A, B, C, D, E, and F) and those outside the scope of the standard certified design. To the extent feasible, this guidance harmonizes the treatment of changes to or departures from the design of a facility under construction pursuant to a COL as described in the FSAR, as updated, with the treatment of changes to the design of a facility operating under 10 CFR Part 50. Background In the 1997 design certification rulemaking for the U.S. Advanced Boiling Water Reactor (ABWR) (Ref. 8), the Commission stated that it modeled 10 CFR Part 52 Appendix A, “Design Certification Rule for the U.S. Advanced Boiling Water Reactor,” Section VIII.B.5, on 10 CFR 50.59. Both provisions then