Document: NRC Regulatory Guide
Document ID: 9c99a4b7-8619-41f0-b716-262bfdb03941
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:
high pressure. 15 Reactor coolant system design. The reactor coolant system and associated auxiliary, control, and protection systems shall be designed with sufficient margin to ensure that the design conditions of the reactor coolant boundary are not exceeded during any condition of normal operation, including anticipated operational occurrences. “Reactor coolant pressure boundary” has been relabeled as “reactor coolant boundary” to create a more broadly applicable non-LWR term that defines the boundary without giving any implication of system operating pressure. As such, the term "reactor coolant boundary" is applicable to non-LWRs that operate at either low or high pressure. 16 Containment design. Same as GDC For non-LWR technologies other than SFRs and mHTGRs, designers may use the current GDC to develop applicable principal design criteria. However, it is also recognized that characteristics of the coolants, fuels, and containments to be used in non-LWR designs could share common features with SFRs and mHTGRs. Hence designers may propose using the SFR-DC-16 or mHTGR-DC 16 as appropriate. Use of the mHTGR-DC 16 will be subject to a policy decision by the Commission. See rationale for mHTGR-DC 16 for further information on the policy decision. 17 Electric power systems. Electric power systems shall be provided to permit functioning of structures, systems, and components important to safety. The safety function for the systems shall be to provide sufficient capacity, capability, and reliability to ensure that (1) specified acceptable fuel design limits and design conditions of the reactor coolant boundary are not exceeded as a result of A reliable power system is required for SSCs during postulated accident conditions. Power systems shall be sufficient in capacity, capability, and reliability to ensure vital safety functions are maintained. The emphasis is placed on requiring reliability of power sources rather than prescribing how such reliability can be