Document: NRC Regulatory Guide
Document ID: 038ef757-4de1-42af-8663-ffdbf7789d63
Document Type: regulatory_guide
Title: Standard Format and Content of Safety Analysis Reports for Nuclear Power Plants (Rev. 3)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2523/ML25234A141.pdf
Revision Date: 2026-02
Chapter: 
Section ID: RG-1.70
CFR Part: 
CFR Title: 

Content:
TE to conduct rulemaking to incorporate RG 1.70 and updates into RG 1.206, or to develop new guidance. This is referred to as RG 1.70 successor rulemaking. No contract dollars are anticipated. This RG 1.70 successor rulemaking effort is estimated at 12 months, with solicitation of public comments, and Office of the General Counsel and the Office of Information and Regulatory Affairs reviews. It is estimated that 1 dedicated Project Manager FTE and equivalent of another 2 FTE for review and project support will be required. 4. Based on the answers to the questions above, what is the staff action for this guide (Reviewed with no issues identified, Reviewed with issues identified for future consideration, Revise, or Withdraw)? Reviewed with issues identified for future consideration. As applicants still use and reference RG 1.70, RG 1.70 withdrawal is postponed. 5. Provide a conceptual plan and timeframe to address the issues identified during the review. The Clinch River CP application review is estimated to be completed November 2026, the Microreactors rulemaking is estimated to be completed November 2026, and 10 CFR Part 53 rulemaking is estimated to be completed December 2027. At the conclusion of these activities the staff will make a decision to either 1) incorporate RG 1.70 into RG 1.206, to include, in phases, guidance for a construction permit and an operating license in a later phase, or 2) to develop new guidance. As stated above, the RG 1.70 successor rulemaking for this revised/new guidance is estimated to take 12 months, with an estimated completion date of December 2028. The resulting regulatory guide will then supersede RG 1.70, which will subsequently be withdrawn. NOTE: This review was conducted in August 2025 and reflects the staff’s plans as of that date. These plans are tentative and are subject to change.