Document: NUREG-0800
Document ID: 3ab8ae04-e11b-4993-a907-f644301c5af2
Document Type: srp
Title: MAIN STEAM SUPPLY SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070577.pdf
Revision Date: 2023-06
Chapter: 10
Section ID: 10.3
CFR Part: 
CFR Title: 

Content:
SRP section. The SAR is reviewed by the SPLBASB and PSB to verify that essential portions of the MSSS are 58 designed to Quality Group B and/or seismic Category I requirements, and to verify that the design classifications specified meet the acceptance criteria specified in subsection II of this SRP section. In general: a. The main steam lines from the steam generators to the containment isolation valves in PWR plants are classified seismic Category I and Quality Group B. b. The main steam lines in BWR plants extending from the outermost containment isolation valve and connected piping up to and including the first valve that is either normally closed or capable of automatic closure during all modes of normal reactor operations but not including the turbine stop and bypass valves are DRAFT Rev. 4 - April 1996 10.3-10 classified seismic Category I and assigned a quality group classification in 59 accordance with Appendix A to SRP Section 3.2.2 BTP RSB 3-1. 60 Alternatively, for BWRs containing a shutoff valve (in addition to the two containment isolation valves) in the MSSS, seismic Category I and a quality group classification in accordance with Appendix B to SRP Section 3.2.2 BTP RSB 3-2 should be applied to that portion of the MSSS extending from the 61 outermost containment isolation valves up to and including the shutoff valve. c. Main steam lines and other main steam system components in BWR plants that do not incorporate an MSIVLCS and that take credit for fission product hold-up and retention in the main steam lines are reviewed for compliance with the criteria of II.1.b. Details of the quality group and seismic classification of main steam lines for BWRs without an MSIVLCS are addressed in Table A-1 and Figure A-1 of Appendix A of SRP Section 3.2.2.62 4. The SAR is reviewed to assure that design provisions have been made to permit appropriate functional testing of system components important to safety. It is acceptable if the SAR delineates a testing and