Document: NUREG-0800
Document ID: 96ddbfc8-7fd0-4a33-9fbe-144d653b6e9f
Document Type: srp
Title: REACTOR CORE ISOLATION COOLING SYSTEM (BWR)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070433.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.4.6
CFR Part: 
CFR Title: 

Content:
requirements of the Commission regulations identified above are as follows: 1. The general objective of the review is to determine that the RCIC system, in conjunction with the HPCS (or HPCI) system, the safety/relief valves, and the suppression pool cooling mode of the residual heat removal system meets the requirements of General Design Criterion 34 (Ref. 2) by providing the capability for decay heat removal to 43 allow complete shutdown of the reactor under conditions requiring its use. It must maintain the reactor water inventory above the top of the active fuel until the reactor is depressurized sufficiently to permit operation of the low pressure cooling systems. The RCIC system, in conjunction with the HPCS (or HPCI) system, the safety/relief valves, and the suppression pool cooling mode of the RHR system must be capable of removing fission product decay heat and other residual heat from the reactor core following shutdown so as to preclude fuel damage or reactor coolant pressure boundary overpressurization. Since RCIC in conjunction with HPCS (or HPCI) is used to provide makeup inventory in some modes of residual heat removal, these systems should jointly meet the guidelines of BTP RSB 5-1 (Reference 17) , attached to SRP Section 5.4.7. 44 2. The RCIC system is also used to supply reactor coolant makeup for small leaks. Accordingly, the systems must meet the requirements of General Design Criterion 33 (Ref. 4) in this regard. 45 3. Historically, credit has been taken for RCIC system capability to mitigate the consequences of certain abnormal events; however, since the cooling function is redundant to the HPCI, HPCS, or HPCF system, the RCIC system itself is not required 46 to meet the single failure criterion, but in conjunction with HPCS, (or HPCI, or HPCF ) 47 DRAFT Rev. 4 - April 1996 5.4.6-6 must satisfy the single failure criterion in this regard. In addition, the RCIC system is to perform its function without the availability of any a-c power per the