Document: NUREG-0800
Document ID: f03d2c71-27a1-41fd-9362-1e62c6142e13
Document Type: srp
Title: Containment Systems and Severe Accidents (Tier 1)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070653.pdf
Revision Date: 2023-06
Chapter: 14
Section ID: 14.3.11
CFR Part: 
CFR Title: 

Content:
cause changes require a finding by the NRC that the change is needed to assure adequate protection of the public health and safety. This results in a very high threshold for change to Tier 1 by either the NRC or others once the rule is issued. Whereas, Tier 2 information can be changed by a combined license (COL) applicant or licensee under a "50.59-like" process, provided the change does not impact Tier 1. The entire change process is described in SECY-96-077. The remainder of this appendix discusses the form and content of the DCD, selected issues unique to design certification reviews, and additional guidance for DCDs. This guidance relies on the requirements for design information to be included in safety analysis reports (SARs) for facilities, as described in NRC Regulatory Guide (RG) 1.70, and the various sections of this SRP. II. Introduction to the DCD The introduction to the DCD should describe the purpose, content overview, and COL applicant or licensee uses of the Tier 1 and Tier 2 portions of the DCD. Although the introduction is part of the DCD, it is neither Tier 1 nor Tier 2 information. Rather, the DCD introduction provides a convenient explanation of the DCD, and is non-binding. All substantive requirements are described in the design certification rule. 14.3-11 DRAFT Rev. 0 - April 1996 III. Tier 2 information 1. General Content of the Tier 2 Information The Tier 2 portion of the DCD should basically consist of the same information as is required for the design certification applicant's SSAR. However, some portions of the DCD may differ from a SSAR, as discussed below. The information in the design certification application (SSAR) is the basis for the staff's safety evaluation for the design. Conceptually, any information that is required for final design approval, but is not intended to be included in the DCD (e.g., proprietary information), should be submitted as a separate report that is referenced in the appropriate section of the DCD. This