Document: NUREG-0800
Document ID: c3ba2b86-3805-4144-9775-cd35b7bffe2d
Document Type: srp
Title: SYSTEM QUALITY GROUP CLASSIFICATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1608/ML16084A884.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.2.2
CFR Part: 
CFR Title: 

Content:
ting system • emergency diesel engine lubrication system • emergency diesel engine combustion air intake and exhaust system • equipment and floor drainage system 2, 3 • feedwater system (up to outermost containment isolation valve or shutoff valve, as applicable) • fuel pool cooling and cleanup system 2, 5 • main steam system (up to but not including the turbine) • main steam isolation valve leakage control system 3 • nuclear boiler system • process and post-accident sampling systems 4 • reactor auxiliary cooling water systems (e.g., essential cooling water and chilled water systems) 2 • reactor core isolation cooling system • reactor recirculation system • reactor water cleanup system • relief valve discharge piping 6 • residual heat removal (RHR) system • RHR service water system • standby gas treatment system 3 • standby liquid control system • station service water system 2 • ultimate heat sink and supporting systems 3 • ventilation systems for areas such as control room and engineered safety features rooms 3 6 Refers to the relief valves providing RCPB overpressure protection. 3.2.2-11 Revision 3 – July 2016 Clarification of the quality group classification provided in RG 1.26 and applicable to those portions of BWR main steam and feedwater systems (other than the reactor coolant pressure boundary) on the turbine side of the containment isolation valves, is provided in Branch Technical Position (BTP) 3-1, “Classification of Main Steam Components Other than the Reactor Coolant Pressure Boundary for BWR Plants,” and 3-2, “Classification of BWR/6 Main Steam and Feedwater Components Other than the Reactor Coolant Pressure Boundary.” Additional guidance on the quality group classification of systems and components for typical plant designs is provided in Appendix A attached to this SRP section. Appendix A identifies quality group classifications and related references supplemental to the guidance of RG 1.26 for the