Document: NRC Regulatory Guide
Document ID: d829ce26-ba04-4c12-a859-82d8195215df
Document Type: regulatory_guide
Title: A Performance-Based Approach to Define the Site-Specific Earthquake Ground Motion (Rev. 0)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1928/ML19288A181.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.208
CFR Part: 
CFR Title: 

Content:
ently published NGA East ground motion models. 2. What is the impact on internal and external stakeholders of not updating the RG for the known issues, in terms of anticipated numbers of licensing and inspection activities over the next several years? While there are no large power reactor license applications anticipated in the near future (next 3 to 5 years), small modular reactor applications are anticipated in the next two years. Not updating the RG will hinder the progress of potential applicants. 3. What is an estimate of the level of effort needed to address identified issues in terms of full-time equivalent (FTE) and contract resources? Complete (two-phase) revision of the RG updates will take approximately 2.0 FTEs of staff time. Contract dollars needed will be on the order of $500K. 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)? Recommended action is to revise the RG in two phases, reflective of short-term and long-term needs. The short-term revision will incorporate updating references and some basic technical definitions to bring the RG to full compliance with already established staff positions. The long-term revision will require the completion of the ongoing research activities in site-response calculations and methodologies. 5. If a RG should be revised, provide a conceptual plan and timeframe to accomplish this. The timeframe for the short-term update is for staff to finish it by the end of the first quarter of the 2020 fiscal year, and to release for public comment in the third quarter of the 2020 fiscal year. The long-term update is planned to commence in FY 2021 subject to availability of funds with completion in FY 2023. NOTE: This review was conducted in October 2019 and reflects the staff’s plans as of that date. These plans are tentative and subject to change.