Document: NRC Regulatory Guide
Document ID: 8a2332d3-66ca-40af-84e1-507db8b26559
Document Type: regulatory_guide
Title: TRIAL - Acceptability of Probabilistic Risk Assessment Results for Non-Light Water Reactor Risk-Informed Activities
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2123/ML21235A008.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.247
CFR Part: 
CFR Title: 

Content:
, Page 12 The NRC staff positions in this RG applies to NLWRs that are intended to be installed and operated at a fixed site (stationary reactors). These include (1) reactors that are constructed at a site and (2) reactors that are constructed and potentially fueled at an offsite facility and installed at a site. This RG does not address PRAs used to assess the risk during NLWR construction at an offsite facility and transportation to the site. The staff notes that the regulations in 10 CFR Part 52 requiring DC, SDA, ML, and COL applicants to provide a description of their PRAs and the results, and the regulations in 10 CFR Part 50 requiring COL holders to maintain and upgrade their PRAs, apply to all commercial nuclear power plants, regardless of their design or thermal power. The staff also notes that the Commission’s severe accident policy statement and the Commission’s advanced reactor policy statement likewise apply to all commercial nuclear power plants. However, in keeping with the philosophy of risk-informed decision- making, the staff recognizes that applicants may want to tailor the PRA’s scope and level of detail commensurate with the role that the PRA results play in establishing the licensing basis and regulatory decision-making. Applicants are encouraged to discuss the scope and level of detail that will be provided in their PRAs during pre-application interactions with the NRC staff. Consideration of International Standards The International Atomic Energy Agency (IAEA) works with member states and other partners to promote the safe, secure, and peaceful use of nuclear technologies. The IAEA develops safety requirements and safety guides for protecting people and the environment from harmful effects of ionizing radiation. This system of safety fundamentals, safety requirements, safety guides, and other relevant reports reflects an international perspective on what constitutes a high level of safety. To inform its development of this RG, the NRC