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:
this review with the other branches' areas of review as 51 stated in subsection I of this SRP section. The primary reviewers obtain and use such input as required to assure that this review procedure is complete. 52 The review procedures below are written for typical MSSSs for both direct and indirect cycle plants. The reviewer will select and emphasize material from this SRP section, as may be appropriate for a particular case. 1. There are significant differences in the design of the MSSS for an indirect cycle (PWR) plant as compared to that for a direct cycle (BWR) plant. Further, different portions of the MSSS are safety-related in different plant designs, although the safety functions of the system are much the same in all PWR plants, and also in all BWR plants. The first step in the review of the MSSS, then, is to determine which portions are designed to perform a safety function. For this purpose, the system is evaluated to determine the components and subsystems necessary for achieving safe reactor shutdown under in all 53 conditions or for performing accident prevention or mitigation functions. 2. The reviewer determines that essential (safety-related) portions of the MSSS are correctly identified and are isolable, to the extent required, from nonessential portions 54 of the system. The system description and piping and instrumentation diagrams (P&IDs) are reviewed to verify that they clearly indicate the physical division between the safety- related and nonessential portions of the system each portion. System arrangement 55 drawings are reviewed to identify the means provided for accomplishing system isolation. 3. The ECGBSGEB reviews the seismic design bases and EMEB reviews the quality and 56 57 seismic classification as indicated in subsection I of this 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