Document: NUREG-0800
Document ID: 988a555f-fdfa-4452-829d-c06654bfbba5
Document Type: srp
Title: Initial Plant Test Program - Design Certification and New License Applicants
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0706/ML070660618.pdf
Revision Date: 2023-06
Chapter: 14
Section ID: 14.2
CFR Part: 
CFR Title: 

Content:
onal tests, or tests and analyses, to verify the direct safety functions for the various system operating modes. ii. Critical Assumptions from Transient and Accident Analyses. The critical assumptions from transient and accident analyses should be verified by ITAAC. Cross-references should be provided in DCD Tier 2 Section 14.3 showing how the key physical parameters from these Tier 2 analyses are captured in Tier 1. These cross-references are also called "Roadmaps". All critical parameters given in the DCD Tier 2 (mainly in chapters 6 and 15) should be identified in the roadmaps. Reviewers should ensure that the critical input parameters are included, as appropriate, in the applicable system ITAAC. The roadmaps and the specific analyses are discussed further in Appendix A to this SRP section. iii. PRA and Severe Accident Insights. If the results of the PRA indicate that a particular component or function of a system is risk significant, that component or function should be verified by ITAAC. PRA insights should be identified in the DCD Tier 2 and in the staff's SER. The reviewer should verify in the individual system ITAAC that the PRA insights are included in the corresponding system ITAAC as indicated in the DCD Tier 2. Roadmaps for PRA, including shutdown safety analyses, as well as severe accidents, should be included in the appropriate sections of the DCD Tier 2, with specific references to the system ITAAC where the key parameters from these analyses are verified. This is discussed further in Appendix A to this SRP section. 14.3-31 March 2007 iv. Online Test Features. Some systems have special provisions for online test capability which is critical to demonstrate its capability to perform the direct safety function. An example is an ECCS test loop. These online test features should be verified by ITAAC. v. Surge Tanks. The capacity of a surge tank should be verified if the tank is needed to perform the direct safety function. For example, for BWRs, a certain