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:
Appendix A to DG-1330, Page A-21 V. Reactor Containment Criterion ARDC Title and Content NRC Rationale for Adaptions to GDC 51 Fracture prevention of containment pressure boundary. The boundary of the reactor containment structure shall be designed with sufficient margin to ensure that, under operating, maintenance, testing, and postulated accident conditions, (1) its materials behave in a nonbrittle manner and (2) the probability of rapidly propagating fracture is minimized. The design shall reflect consideration of service temperatures and other conditions of the containment boundary materials during operation, maintenance, testing, and postulated accident conditions, and the uncertainties in determining (1) material properties, (2) residual, steady-state, and transient stresses, and (3) size of flaws. ARDC 51–57 support ARDC 50, which specifically applies to non- LWR designs that use a fixed containment structure. Therefore, the word “structure” is added to each of these ARDC to clearly convey the understanding that this criterion applies to designs employing containment structures. The term “ferritic” was removed to avoid limiting the scope of the criterion to ferritic materials. With this revision, the staff believes that this criterion is more broadly applicable to all non-LWR designs. The word “pressure” was left in the title to reflect that, while a design might not have a high-pressure containment like a traditional LWR, the containment still serves a pressure-retaining function. 52 Capability for containment leakage rate testing. The reactor containment structure and other equipment that may be subjected to containment test conditions shall be designed so that periodic integrated leakage rate testing can be conducted at containment design pressure. ARDC 51–57 support ARDC 50, which specifically applies to non- LWR designs that use a fixed containment structure. Therefore, the word “structure” is added to each of these ARDC to clearly