Document: NRC Regulatory Guide
Document ID: 5810150e-ee20-4cd1-b72f-6e918a603f73
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:
chnical 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 these departures in the COL proceeding, as described in Section VI.B of the DCRs. The applicant’s compliance with the Tier 2 change controls in the DCR is subject to the NRC staff’s inspection. The basis for this position, as described in NUREG-1503, Final Safety Evaluation Report Related to the Certification of the Advanced Boiling Water Reactor Design, Supplement 1, May 1997 (Ref. 97) is that the departure process, if it is properly implemented by a COL applicant, “must logically result in departures which are both ‘within the envelope’ of the Commission’s safety finding for the DCR and for which the Commission has no safety concern. Therefore, it follows that properly implemented departures from Tier 2 should continue to be accorded the same extent of issue resolution as that of the original Tier 2 information from which it was ‘derived.’” Departures from Tier 2 of the generic DCD, executed according to the change control process described above and approved by the NRC staff where necessary, become part of Tier 2 in the plant-specific DCD (as defined in Section II of the DCR) that is maintained by the applicant or licensee. As such, this information remains subject to the Tier 2 change process. DG-1325, Page-97 Changes to Tier 2* Information Tier 2* is different from the remainder of Tier 2 because NRC approval is required for any change, as described in Section VIII.B.6 of the DCRs. The category of Tier 2* information was established during the NRC’s initial DC reviews. During this development process, these applicants requested that the agency minimize the amount of information in Tier 1 to allow additional flexibility for a COL applicant or licensee who references a DCR. Tier 2 also specified many codes, standards, and design processes that