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:
iated with flow instabilities and loads (e.g., water hammer). C. General Design Criterion 5 which requires that any sharing among nuclear power units of structures, systems and components important to safety will not significantly impair their safety function. D. General Design Criterion 19 with respect to control room requirements for normal operations and shutdown, and; E. General Design Criterion 34 which specifies requirements for a residual heat removal system. Specific criteria necessary to meet the requirements of General Design Criteria 2, 4, 5, 19, and 34 are as follows: 5.4.7-4 Rev. 3 - April 1984 1. The system or systems are to satisfy the functional, isolation, pressure relief, pump protection and test requirements specified in Branch Technical Position RSB 5-1. 2. In order to meet the requirements of General Design Criterion 4 (Ref 11), design features and-operating procedures shall be provided to prevent damaging water hammer due to such mechanisms as voided pump discharge lines, water entrainment in steam lines and steam bubble collapse. 3. Interfaces between the RHR system and RCIC and component or service water systems should be designed so that operation of one does not interfere with, and provides proper support (where required) for, the other. In relation to these and other shared systems (e.g., emergency core cooling and containment heat removal systems), the RHR system must conform to GDC 5. 4. The requirements for the reliability and capability of removing decay heat under the following Task Action Plan items must also be satisfied: a. Meeting Task Action Plan item II.E.3.2 of NUREG-0660 which involves systems reliability. NRR will conduct a generic study to assess the capability and reliability of shutdown heat removal systems under various transients and degraded plant conditions including complete loss of all feedwater. Deterministic and probabilistic methods will be used to identify design weaknesses and possible system modifica- tions