Document: NUREG-0800
Document ID: dac334d4-585f-42f5-bde4-118e876f5d4c
Document Type: srp
Title: PIPING SYSTEMS AND COMPONENTS (Tier 1)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070660.pdf
Revision Date: 2023-06
Chapter: 14
Section ID: 14.3.3
CFR Part: 
CFR Title: 

Content:
equipment in its as-built condition, including anchorages, to perform their safety functions during and following a safe shutdown earthquake. Detailed supporting information for dynamic qualification requirements, including seismic qualification records, is contained in DCD Tier 2 Chapter 3. The Tier 2 information describing dynamic qualification of equipment should be considered for designation as Tier 2*. Tier 2* information is discussed further in Appendix A to SRP Section 14.3. MOVs AND OTHER VALVES The verification of the design qualification of valves is performed in conjunction with the basic configuration check for mechanical equipment as discussed above. For MOVs in particular, a special inspection is required as a part of the basic configuration check to verify the records of vendor tests that demonstrate the ability of MOVs to function under design conditions. The list of MOVs in Tier 1 should include, but is not limited to, those with active safety related functions. These may be listed in Tier 2 in the IST plan or other locations. The material in DCD Tier 2 Chapter 3 should provide detailed supporting information for the CDM regarding the methods to be used by the COL applicant or licensee for the design, qualification, and testing of MOVs to demonstrate their design basis capability. This material should be considered for designation as Tier 2* information. Tier 2* information is discussed further in Appendix A to SRP Section 14.3. In-situ testing of installed MOVs, power-operated valves, and check valves to verify that they can perform their intended functions under various fluid flow, differential pressure, electrical, and temperature conditions should be conducted as appropriate in the applicable system ITAAC. Standard ITAAC are provided in Appendix D to SRP Section 14.3 for verification of the performance of these valves. These may be performed as part of the pre-operational test program. Tier 2 information should be provided that defines that