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:
site power to its support systems, including space coolers, for at least two hours per the requirement of item II.K.3.24 of NUREGs-0737 and 0718 (Ref. 1 and 11) . 99 165. The reviewer confirms per the requirements of item II.K.3.13 of NUREGs-0737 and 0178 0718 (Ref. 1 and 11) that analyses have been provided or referenced to 100 101 determine the need to separate the RCIC and the HPCS (or HPCI) initiation levels. Based on these study results, the reviewer checks the RCIC design for appropriate provisions. In addition, the reviewer checks to see that automatic restart capability is provided for RCIC. DRAFT Rev. 4 - April 1996 5.4.6-12 176. The reviewer checks (by calculation as necessary) to see that adequate net positive suction head is available for RCIC suction from all potential sources (i.e., condensate storage tank, suppression pool, or RHR steam condensing mode discharge). 187. The reviewer examines the RCIC in conjunction with the HPCS or HPCI, the safety/relief valves and the suppression pool cooling mode of RHR for conformance to the recommendations of BTP RSB 5-1 to SRP Section 5.4.7 regarding residual heat removal. 198. The RCIC system is reviewed to evaluate the adequacy of design features that have been provided to prevent damaging water (steam) hammer due to such mechanisms as voided discharge lines, water entrainment and steam bubble collapse. If the normal water supply is above the discharge lines, voided lines are prevented by proper vent location and filling and venting procedures. The vents should be located for ease of operation and testing on a periodic basis. 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 and venting procedures are still needed. In addition, a special keep-full system with appropriate alarms is needed to supply water to