Document: NUREG-0800
Document ID: f0ec8180-bdec-47b1-b10f-926bce888716
Document Type: srp
Title: FUNCTIONAL DESIGN, QUALIFICATION, AND INSERVICE TESTING PROGRAMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1613/ML16134A116.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.6
CFR Part: 
CFR Title: 

Content:
new reactor designs in several Commission papers. These policy papers include SECY-93-087, “Policy, Technical, and Licensing Issues Pertaining to Evolutionary and Advanced Light-Water Reactor (ALWR) Designs,” SECY-94-084, “Policy and Technical Issues Associated with the Regulatory Treatment of Non-Safety Systems in Passive Plant Designs,” and SECY-95-132, “Policy and Technical Issues Associated with the Regulatory Treatment of Non-Safety Systems (RTNSS) in Passive Plant Designs (SECY-94- 084),” and their associated SRMs. This SRP section incorporates the Commission policy positions for new reactors with respect to functional design, qualification, and IST programs for pumps, valves, and dynamic restraints. 3.9.6-4 Revision 4 – March 2017 One policy issue related to new reactor designs involves the RTNSS program for nuclear power plants with passive safety systems that rely on natural forces to supply safety injection water and to provide reactor core and containment cooling. Active systems in such passive reactor designs are categorized as non-safety systems with limited exceptions. Active systems in passive reactor designs provide the first line of defense to reduce challenges to the passive systems in the event of a transient at the nuclear power plant. The Commission has determined that those active systems that provide a defense-in-depth function in passive reactor designs will not be required to meet all of the acceptance criteria for safety-related systems. However, there should be a high level of confidence that these active systems will be available and reliable when challenged. Multiple activities will provide confidence in the capability of these active systems to perform their defense-in-depth functions, and are referred to together as the RTNSS program. This SRP section provides guidance for NRC reviewers to address functional design and qualification provisions and IST activities for RTNSS pumps, valves, and dynamic restraints in passive