Document: NUREG-0800
Document ID: 164d26ee-2125-481e-9fae-fb7b05365716
Document Type: srp
Title: RESIDUAL HEAT REMOVAL (RHR) SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340635.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.4.7
CFR Part: 
CFR Title: 

Content:
NUREG-0718, "Licensing Requirements for Pending Applications for Construc- tion Permits and Manufacturing License." 8. NUREG-0737, "Clarification of TMI Action Plan Requirements." 9. Regulatory Guide 1.1, "Net Positive Suction Head for Emergency Core Cooling and Containment Heat Removal Systems." 10. NUREG-0660, "NRC Action Plan Developed as a Result of the TMI-2 Accident." 11. 10 CFR Part 50, Appendix A, General Design Criterion 4, "Environmental and Missile Design Bases." I I 5.4.7-12 Rev. 3 - April 1984 BRANCH TECHNICAL POSITION RSB 5-1 DESIGN REQUIREMENTS OF THE RESIDUAL HEAT REMOVAL SYSTEM BACKGROUND GDC 19 states that, "A control room shall be provided from which actions can be taken to operate the nuclear power unit under normal conditions. . ." Normal operating conditions including the shutting down of a reactor; therefore, since the residual heat removal (RHR) system is one of several systems involved in the normal shutdown of all reactors, this system must be operable from the control room. GDC 34 states that "Suitable redundance. . .shall be provided to assure that for onsite electrical power system operation (assuming offsite power is not available) and for offsite electrical power system operation (assuming onsite power is not available), the system safety function can be accomplished, assuming a single failure." 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. Plants which may have RHR systems that deviate from current designs will be reviewed on a case-by-case basis. The functional, isolation, pressure relief, pump protection, and test requirements for the RHR system are included in this position. BRANCH