Document: NUREG-0800
Document ID: 62485d6f-6b2a-4360-acb5-f874d2adc406
Document Type: srp
Title: PIPING SYSTEMS AND COMPONENTS - INSPECTIONS, TESTS,
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1808/ML18088A069.pdf
Revision Date: 2023-06
Chapter: 14
Section ID: 14.3.3
CFR Part: 
CFR Title: 

Content:
Selected material in DCD Tier 2, Chapter 3 provides design information and defines design processes that are acceptable for use in satisfying the piping DAC in Tier 1. 14.3.3−9 Draft Revision 1 – September 2018 However, Tier 2 information may be changed by a COL applicant or licensee referencing the certified design in accordance with a "50.59-like" process specified in the rule certifying the design. The staff's evaluation of the standard design for piping systems is based on the design processes and acceptance criteria specified in the DAC, if used, and supporting information in Tier 2. DC applicants may also request that selected aspects of the piping design described in Tier 1 be designated as Tier 2* information. When Tier 1 information is designated as Tier 2* information, it becomes Tier 2 information that requires NRC approval prior to implementation of any proposed change. The Tier 2* change control process is thus stricter than that applied to all other Tier 2 information. Consideration should also be given to allowing the designation of Tier 2* to expire at first full power when the detailed design is complete and performance characteristics of the facility are known. Although DC applicants may propose designating Tier 2* information based on the approved DCDs for the evolutionary designs, the NRC bears the final responsibility for approving which material is Tier 2*. The basis for the use of Tier 2* should be discussed in the staff's safety evaluation report (SER). The Tier 2* information is discussed further in Appendix A to SRP Section 14.3. Codes, Standards, and Topical or Technical Reports. Incorporation by reference of codes, standards, and topical or technical reports, whether in whole or in part, into the certified design material (CDM) should be minimized, with exceptions granted on a case- by-case basis. Instead, the applicable requirements, including specific design provisions, from codes, standards, or reports should be directly stated in