Document: NUREG-0800
Document ID: f1b42595-bded-40aa-9d0a-68db845fc3e8
Document Type: srp
Title: MAIN STEAM SUPPLY SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350073.pdf
Revision Date: 2023-06
Chapter: 10
Section ID: 10.3
CFR Part: 
CFR Title: 

Content:
dent 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 trans- porting 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 atmo- spheric 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 steam hammer resulting from rapid valve closure and relief valve fluid discharge loads. 2. The ASB reviews the MSSS with regard to measures provided to limit blow- down of the system in the event of a steam line break. 3. The ASB and PSB also review the design of the MSSS with respect to the following: a. The functional capability of the system to transport steam from the nuclear steam supply system as required during all operating conditions. b. The capability to detect and control system leakage, and to isolate portions of the system in case of excessive leakage or component malfunctions. c. The capability to preclude accidental releases to the environment. d. Provisions for functional testing for safety-related portions of the system. 4. ASB also performs the following reviews under the SRP sections indicated: 10.3-2 Rev. 3 - April 1984 a. Review for flood protection is performed under SRP Section 3.4.1. b. Review of the