Document: NUREG-0800
Document ID: 6237521d-c825-4ed6-8fb7-7b3b8019a3fc
Document Type: srp
Title: SYSTEM QUALITY GROUP CLASSIFICATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070297.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.2.2
CFR Part: 
CFR Title: 

Content:
Air Systems required to C SRP 9.3.1 perform a safety function 158 3. Containment Isolation System: A/B (2) SRP 6.2.4 a. Penetrations including associated A/B (2) Reg. Guide 1.141 piping and isolation valves b. Instrument lines penetrating containment B (3) Reg. Guide 1.11 c. Isolation barriers comprised of closed systems inside containment B (2) SRP 6.2.4 d. Isolation barriers comprised of closed systems outside containment e. Closed systems in secondary containment proposed as boundaries to preclude bypass leakage B (2) SRP 6.2.4 B (4) Branch Technical Position 159 CSB 6-3 System or Component Quality References Group 3.2.2-25 DRAFT Rev. 2 - April 1996 4. Emergency Diesel Engine: 160 a. Fuel Oil Storage and Transfer System C (5) Reg. Guide 1.137 b. Cooling Water System c. Starting System d. Lubrication System e. Combustion Air Intake and Exhaust System C C C C 5. Equipment and Floor Drainage System C (6) SRP 9.3.3161 6. Gas Treatment Systems which are B considered as engineered safeguards systems 162 7. BWR Main Steam Isolation Valve Leakage B/A (7) Reg. Guide 1.96 Control System and necessary subsystems 163 8. Plant Ventilation Systems for areas such as C the control room and engineered safety features rooms 164 9. PWR Pressurizer PORVs, associated (8) Generic Letter 90-06 components, and Block Valves 165 10. Radioactive Waste Management Systems (9) Reg. Guide 1.143166 11. Safety-Related Instrument Sensing Lines B,C (10) Reg. Guide 1.151167 12. Ultimate Heat Sink and Supporting Systems C (11) SRP 9.2.5, Reg. Guide 1.72168 NOTES: (1) Reg. Guide 1.7 describes acceptable methods for the control of combustible gas in containment. Position C.3 of the Reg. Guide describes the appropriate classification of combustible gas control systems as Quality Group B.169 (2) SRP Section 6.2.4 contains guidance related to classification of containment isolation systems. Containment isolation system components (e.g., isolation barriers) are normally classified as Quality Group B