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:
B is responsible for the review of the remainder of the MSSS. (The turbine stop valve review is 6 included in SRP Section 10.2.) The SPLBPSB also determines the adequacy of the design, 7 installation, inspection, and testing of the electrical power supplies for essential components required for proper operation of the MSSS. The design of the MSSS must be in accordance with General Design Criteria 2, 4, 5, and 34 and 10 CFR 50.63. 8 1. The SPLB ASB and PSB reviews the MSSS to determine which, if any, portions of the 9 system are essential for safe shutdown of the reactor or for preventing or mitigating the consequences of accidents. The system is reviewed to verify that: a. A single malfunction or failure of an active component would not preclude safety-related portions of the system from functioning as required during normal operations, adverse environmental occurrences, and accident conditions, including loss of offsite power. b. Appropriate quality group and seismic design classification are met for safety-related portions of the system. c. Failures of nonseismic Category I equipment or structures, or pipe cracks or breaks in high- and moderate-energy piping will not preclude essential functions of safety-related portions of the system. d. The system is capable of performing multiple functions such as transporting steam to the power conversion system, providing heat sink capacity or pressure relief capability, or supplying steam to drive safety system pumps (e.g., turbine-driven auxiliary feedwater pumps), as may be specified for a particular design. e. The design of the MSSS includes the capability to operate the atmospheric dump valves remotely from the control room following a safe shutdown earthquake coincident with the loss of offsite power so that a cold shutdown can be achieved with dependence upon safety-grade components only. f. The system design capability can withstand adverse dynamic loads, such as water (steam) hammer resulting from rapid valve