Document: NRC Regulatory Guide
Document ID: b143ccef-ed08-482d-bc4b-b4e012328090
Document Type: regulatory_guide
Title: Applications for Nuclear Power Plants (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1523/ML15233A056.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.206
CFR Part: 
CFR Title: 

Content:
on, this information remains subject to the Tier 1 change process. DG-1325, Page-96 Changes to Tier 2 Information As defined in Section II of the DCRs, Tier 2 is the portion of the generic DCD that is approved but not certified by the DCR. It includes the following: a. the information required by 10 CFR 52.47(a) and (c) except for generic technical specifications and conceptual design information, b. supporting information on ITAAC, c. COL action items, and d. other items listed in the DCR as included in Tier 2. Section VIII.B of the DCRs describes the process for making changes, some of which may be made without prior NRC approval. Sections VIII.B.5.b (for most Tier 2 information), VIII.B.5.c (for severe accident features), and VIII.B.5.d (for aircraft impact assessment) of the DCRs provide the criteria for determining whether prior approval is required. The criteria in Section VIII.B.5.b of the DCRs are similar to those in 10 CFR 50.59 and relate to accident analyses, SSC functions, design-basis limits, and methods of evaluation. An exemption is not automatically required because the material is approved but not certified; however, an applicant may determine that requesting an exemption from Tier 2 material in certain cases is appropriate. A COL applicant departing from Tier 2 of the generic DCD should describe the basis for the change (grouped by topic where appropriate), justify the regulatory acceptability, and provide the appropriate revisions to the generic DCD in the plant-specific DCD. It should provide this information regardless of whether the individual change requires prior NRC approval. In determining that a change does not require prior NRC approval, the applicant should verify that the Tier 2 change does not affect Tier 1, Tier 2*, or the generic technical specifications. Departures from Tier 2 made in compliance with Section VIII.B.5 of the DCRs that do not require prior NRC approval will be considered resolved. The NRC staff will not re-review