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:
ransients 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 that could be made to improve the capability and reliability of these systems under all shutdown conditions. (CPs and OLs). Specific requirements will be based on the results of this study. b. Meeting Task Action Plan item II.E.3.3 of NUREG-0660 which involves a coordinated study of shutdown heat removal requirements. An effort to evaluate shutdown heat removal requirements in a comprehensive manner is required, thereby permitting a judgment of adequacy in terms of overall system requirements. As part of this project, NRR will conduct a study to assess the desirability of and possible requirement for a diverse heat-removal path, such as feed and bleed, particularly if all secondary-side cooling is unavailable. The NRC staff will work with the recently established ACRS Ad Hoc Subcommit- tee on this matter to develop a mutually acceptable overall study program. (CPs and OLs). Specific requirements will be based on the results of this study. c. Meeting Task Action Plan item II.B.8 of NUREG-07.8 (Ref. 7) which involves description by the applicants of the degree to which the designs conform to the proposed interim rule on degraded core accidents. (CPs only) d. Meeting Action Plan item III.D.L.l of NUREG-0737 (Ref. 8) and NUREG-0718 (Ref. 7) which involves primary coolant sources outside of containment (CPs and OLs). 5. When the RHR system is used to control or mitigate the consequences of an accident, it must meet the design requirements of an engineered safety 5.4.7-5 .Rev. 3 - April 1984 feature system. This includes meeting the guidelines of Regulatory Guide 1.1 regarding net positive suction head. III. REVIEW PROCEDURES The procedures below are used during the construction permit (CP) review to assure that the design criteria and bases and the preliminary design as set