Document: NUREG-0800
Document ID: fd06ef1f-75ea-4f29-9779-8714e92f3050
Document Type: srp
Title: MAIN STEAM ISOLATION VALVE LEAKAGE CONTROL SYSTEM (BWR)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070451.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.7
CFR Part: 
CFR Title: 

Content:
sential portions of the system. The P&IDs are reviewed to verify that they clearly indicate the physical divisions between such portions and indicate any design classification changes. System drawings are reviewed to see that they show the means for accomplishing isolation and the system description is reviewed to identify minimum performance requirements for the leakage control system isolation valves. c. Essential components of the leakage control system, including the isolation valves separating any nonessential portions of the system, and the seal fluid source (if DRAFT Rev. 3 - April 1996 6.7-8 used) are classified seismic Category I and Quality Group A or B, as specified in Regulatory Guide 1.96. Component and system descriptions in the SAR that identify mechanical and performance characteristics are reviewed to verify that the above classifications have been included, and that the P&IDs indicate points of design classification changes. The review for seismic design is performed by SEBECGB and the review for seismic and quality group classification is 46 performed by MEBEMEB, as indicated in subsection I of this SRP section. 47 d. Design provisions have been made that permit appropriate inservice inspection and functional testing of system components. It is acceptable if the SAR information delineates a testing and inspection program and if the system drawings show the necessary design provisions to accomplish the testing program. 2. The reviewer determines that the safety function of the MSIVLCS will be maintained, as required, in the event-of adverse environmental phenomena such as earthquakes. The reviewer uses engineering judgment, the results of failure modes and effects analyses, and the results of reviews performed under other SRP sections indicated in subsection I of this SRP section to determine that the failure of nonessential portions of the system or of other systems not designed to seismic Category I and located close to essential portions of the