Document: NUREG-0800
Document ID: 5d88f9f1-c708-4a51-8593-a2aa484a15f3
Document Type: srp
Title: Revision 4 - March 2007
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0708/ML070850123.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5
CFR Part: 
CFR Title: 

Content:
ical reactor with a reactor coolant temperature no greater than 93.3EC (200EF) for a pressurized-water reactor (PWR) and 100EC (212EF) for a boiling-water reactor. BTP 5-4-2 Revision 4 - March 2007 In most current plant designs, the RHR system has a lower design pressure than the reactor coolant system (RCS), is located outside of containment, and is part of the emergency core cooling system (ECCS). However, it is possible for the RHR system to have different design characteristics. For example, the RHR system might have the same design pressure as the RCS, or be located inside of containment. The staff will review plants that may have RHR systems that deviate from current designs on a case-by-case basis. This position includes the functional, isolation, pressure relief, pump protection, and test requirements for the RHR system. B. BRANCH TECHNICAL POSITION 1. Functional Requirements The system(s) that can be used to take the reactor from normal operating conditions to cold shutdown1 shall satisfy the following functional requirements: A. The design shall be such that the reactor can be taken from normal operating conditions to cold shutdown using only safety-grade systems. These systems shall satisfy GDC 1 through 5. B. The system(s) shall have suitable redundancy in components and features, and suitable interconnections, leak detection, and isolation capabilities to ensure that for onsite electrical power system operation (assuming offsite power is not available) and offsite electrical power system operation (assuming onsite power is not available) the system function can be accomplished assuming a single failure. C. The system(s) shall be capable of being operated from the control room (including instrumentation for monitoring and control functions) with either only onsite or offsite power available. In demonstrating that the system can perform its function assuming a single failure, limited operator action outside of the control room would be considered