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:
perly justified the design and that the applicant’s test program and test results demonstrate that the system satisfies the intent of II.K.3.15 in preventing spurious isolation of the RCIC system on initiation. 5.4.6-11 Revision 2 - March 2007 14. The reviewer confirms, in conjunction with Balance of Plant as necessary, that the RCIC system can withstand a loss of offsite power to its support systems, including space coolers, for at least 2 hours, per item II.K.3.24 of NUREG-0737 and NUREG-0718. 15. The reviewer confirms, per the criteria in item II.K.3.13 of NUREG-0737, that analyses have been provided or referenced to determine the need to separate the RCIC and the HPCS (or HPCI) initiation levels. On the basis of these study results, the reviewer checks the RCIC design for appropriate provisions. In addition, the reviewer verifies that the RCIC system has an automatic restart capability. 16. The reviewer checks (by calculation as necessary) to confirm that adequate net positive suction head is available for RCIC suction from all potential sources (i.e., CST or suppression pool). 17. The reviewer examines the RCIC in conjunction with the HPCS or HPCI, the SRVs, and the suppression pool cooling mode of the RHR system for conformance to the recommendations of BTP 5-4. 18. The review of the RCIC system evaluates the adequacy of design features that prevent damaging water (steam) hammer attributable to mechanisms such as voided discharge lines, water entrainment, and steam bubble collapse. If the normal water supply is above the discharge lines, proper vent location and filling and venting procedures will prevent voided lines. The location of the vents should enhance the ease of operation and periodic testing. If the normal alignment of the suction valves is to a source below the highest level of the pump discharge lines (e.g., the suppression pool), back leakage through the pump discharge check valves will result in line voiding. Proper vent location and filling