Document: NUREG-0800
Document ID: 273208f0-4a10-46de-b0f1-6ddc1ce53c6a
Document Type: srp
Title: CONTAINMENT SYSTEMS AND SEVERE ACCIDENTS (Tier 1)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070671.pdf
Revision Date: 2023-06
Chapter: 14
Section ID: 14.3.11
CFR Part: 
CFR Title: 

Content:
s may be checked using the manual isolation switches in the main control room (MCR). Other ITAAC may verify that a containment isolation signal is generated for each of the process variables that will cause a containment isolation; the intent is to preclude multiple cycling of the containment isolation valves during the testing. Tier 1 should address and verify at least the minimum inventory of alarms, displays, and controls in DCD Tier 2 Chapter 18. These are derived from Generic Technical Guidelines (e.g., EPGs, ERGs), the requirements of RG 1.97, and severe accident and PRA insights. They may be specified in the MCR and the Remote Shutdown System (RSS) ITAAC, or addressed in the appropriate ITAAC, and verified to exist. Other controls, displays, and alarms should be identified in the system ITAAC based on their safety significance. Locations for these should be shown on system figures if important to system design and function. III. REVIEW PROCEDURES 1. Follow the general procedures for review of Tier 1 contained in the Review Procedures section of SRP Section 14.3. Ensure that the DCD is consistent with Appendix A to SRP Section 14.3. Review responsibilities may be consistent with those in Appendix B to SRP Section 14.3. 2. Ensure that all Tier 1 information is consistent with Tier 2 information. Figures and diagrams should be reviewed to ensure that they accurately depict the functional arrangement and requirements of the systems. Reviewers should use the Review Checklists in Appendix C to SRP Section 14.3 as an aid in establishing consistent and comprehensive treatment of issues. 3. Ensure that the containment systems are clearly described in Tier 1, including the key performance characteristics and safety functions of SSCs based on their safety significance. 4. The reviewer should ensure that appropriate guidance is provided to other branches such that containment systems issues in Tier 1 are treated in a consistent manner among branches. 5. Ensure that