Document: NRC Regulatory Guide
Document ID: da269da5-7390-4252-b08f-bdb7aeb8beaf
Document Type: regulatory_guide
Title: Developing Principal Design Criteria for Non-Light Water Reactors + HISTORY - HISTORY 02/2017 – DG-1330 , Proposed Revision 0
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1630/ML16301A307.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.232
CFR Part: 
CFR Title: 

Content:
applicants would not need to request an exemption from the GDC in 10 CFR Part 50 when proposing PDC for a specific design. Applicants may use this RG to develop all or part of the PDC and are free to choose among the ARDC, SFR-DC, or mHTGR-DC to develop each PDC. For example, FHRs are liquid-metal reactors that use tristructural isotropic (TRISO) fuel, which is the same fuel used for mHTGR technologies. An FHR designer could use the mHTGR-DC where appropriate for the design. Another example is the MSRs that use molten fuel. An MSR designer may need to develop new PDC for molten fuel and systems to support this design. In each case, it is the designer’s/applicant’s responsibility to provide not only the PDC for the design but also supporting information that justifies to the NRC how the design meets the PDC submitted. In instances where a GDC or non-LWR design criterion (ARDC, SFR-DFC, mHTGR-DC) is not proposed, the designer/applicant must provide a basis and justify the omission from a safety perspective. As noted earlier in this RG under the subheading, “Role of the General Design Criteria for Non- LWRs,” the current GDC are regulations and therefore use the words “shall” and “must” that are appropriate for regulatory requirements. The proposed ARDC, SFR-DC, and mHTGR-DC presented in Appendices A, B, and C to this RG also use the words “shall”, and “must” for consistency with the GDC, and so that non-LWR applicants can use them in the same manner as GDC when developing PDC. However, this wording does not make them regulatory requirements, as they are contained in a guidance document. Finally, the non-LWR design criteria as developed by the NRC staff are intended to provide stakeholders with insights into the staff’s views on how the GDC could be interpreted to address non- LWR design features; however, these are not considered to be final or binding on what may eventually be required from a non-LWR applicant. Non-LWR Crosswalk Table The