Document: NRC Regulatory Guide
Document ID: db0c5d18-2d27-4720-8935-40b402e52f9a
Document Type: regulatory_guide
Title: Guidance for a Technology-Inclusive, Risk-Informed, and Performance-Based Methodology to Inform the Licensing Basis and Content of Applications for Licenses, Certifications, and Approvals for Non-Light Water Reactors + HISTORY - HISTORY 05/2019 – Issued DG-1353 , Proposed Revision 0
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1831/ML18312A242.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.233
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CFR Title: 

Content:
sing-basis information is iterative, involving assessments and decisions on key SSCs, operating parameters, and programmatic controls to ensure that a reactor can be deployed without posing undue risk to public health and safety. To begin the process of translating design information into a licensing application, a developer needs, at a minimum, a conceptual design that includes a reactor; a primary coolant; and a preliminary assessment of how the design will accomplish fundamental safety functions, such as reactivity and power control, heat removal, and radioactive material retention. When preparing licensing documentation, the applicant typically provides this information in Chapter 4, “Reactor,” Chapter 5, “Reactor Coolant and Connecting Systems,” and Chapter 6, “Engineered Safety Features” of its safety analysis report.3 Information within these chapters includes the parameters and values to define when important layers of defense (including physical barriers) to the release of radioactive material would degrade or fail. This type of information is important because it often serves as acceptance criteria for the analyses of LBEs and as an input into the analysis of releases via a mechanistic source-term approach to estimating radiological consequences from potential transients and postulated accidents. The methodology described in NEI 18-04 and in this RG provides a general framework to support design decisions and decisions related to the scope and level of detail of information to be included in applications. The actual development of an application depends not only on this guidance but also on the design, the safety justifications prepared by the developer, and consideration of the entirety of regulatory requirements the NRC and other agencies have established. The system designs and safety evaluations may demonstrate compliance with or justify exemptions from specific NRC regulations and identify where design-specific regulatory controls are