Document: NUREG-0800
Document ID: d0a29cc6-24fb-443d-8b43-655916964d83
Document Type: srp
Title: REACTOR WATER CLEANUP SYSTEM (BWR)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340638.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.4.8
CFR Part: 
CFR Title: 

Content:
ning flow through filter/ demineralizer units in the event system flow decreases to a point where the bed may drop from the septum. d. Provisions for monitoring resin transfers to assure transfers are complete and design considerations are incorporated to eliminate resin traps. e. Provisions for venting cleanup system components during drain, fill, and air mixing operations. f. Provisions for removing resin particles from cleanup system product water to prevent resins from entering the reactor system. 2. CMEB reviews the system capacity and processing flexibility and considers the following: 5.4.8-5 Rev. 2 - July 1981 a. The process equipment, resin types, and bed volumes compared to those for similar reactors and the RWCS capability compared to the guide- lines of Regulatory Guide 1.56 (reference 3). b. The design flows and temperatures through the system to assure the criteria for outlet temperature relative to resin temperature are met. c. The RWCS capability to process surplus refueling water prior to storage in the refueling water storage tanks or the condensate storage tanks. d. Redundant or. parallel components which will permit cleanup, if required, during periods of equipment downtime or single active component failures. 3. CMEB coordinates with MEB in the review of the quality group and seismic design classification of the system, and compares the design to the guide- lines of Regulatory Guides 1.26 (reference 1) and 1.29 (reference 2) to assure conformance with acceptance criterion II.3 above. 4. CMEB reviews the instrumentation and controls for the reactor water cleanup system to assure that monitors are provided for. a. Conductivity of demineralizer effluent. b. Temperature and conductivity of demineralizer influent. c. Differential pressure across the demineralizer and across the resin strainers. CMEB assures that system controls are responsive to the monitor indications to maintain the required temperature and flow and that conductivity meters cover