Document: NUREG-0800
Document ID: c766e34e-6ea5-45e7-9123-75964d118447
Document Type: srp
Title: REACTOR CORE ISOLATION COOLING SYSTEM (BWR)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070540102.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.4.6
CFR Part: 
CFR Title: 

Content:
nded. This is accomplished by reviewing the piping and instrumentation diagrams to confirm that piping arrangements permit achievement of the required flowpaths and that sufficient process sensors are available to measure and transmit required information. 3. Using the comparison tables of SAR Section 1.3, the RCIC system is compared to the designs and capacities of such systems in similar plants to confirm that there are no unexplained departures from previously reviewed plants. If possible, comparisons should use actual performance data from similar systems in operating plants. 4. The reviewer checks the piping and instrumentation diagrams and equipment layout drawings for the RCIC system and the HPCS, HPCI, or HPCF system to confirm that the systems are physically separated and can function independently. 5. The reviewer examines the system design in SAR Section 5.4.6 to verify that the capability for automatic switchover of suction from the CST to the suppression pool has been provided, pursuant to the guidance of item II.K.3.22 of NUREG-0737. The reviewer also judges whether adequate control and monitoring information is available to allow the operator to actuate the system manually or to realign the RCIC system manually within the time allowed (i.e., change the RCIC system suction from the CST to the suppression pool or to the steam condensing mode of the RHR system). 6. The reviewer contacts the Instrumentation and Electrical Control Systems organization to confirm that automatic actuation and remote-manual valve controls are capable of performing the functions required and that sensor and monitoring provisions are adequate. The instrumentation and controls of the RCIC system-in conjunction with the HPCS, HPCI, or HPCF system-must have sufficient redundancy to satisfy the single failure criterion. 5.4.6-10 Revision 2 - March 2007 7. The reviewer contacts the Instrumentation and Electrical Control Systems organization to ascertain that the RCIC system