Document: NUREG-0800
Document ID: 73148264-0cb4-4b1b-8586-3105a0a46c78
Document Type: srp
Title: REACTOR WATER CLEANUP SYSTEM (BWR)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0631/ML063190009.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.4.8
CFR Part: 
CFR Title: 

Content:
e probability that the system would fail under postulated accident conditions. III. REVIEW PROCEDURES The reviewer will select material from the procedures described below, as may be appropriate for a particular case. These review procedures are based on the identified SRP acceptance criteria. For deviations from these acceptance criteria, the staff should review the applicant’s evaluation of how the proposed alternatives provide an acceptable method of complying with the relevant NRC requirements identified in Subsection II. 1. The system description and piping and instrumentation diagrams (P&IDs) are reviewed to determine the processing sequence, interconnections with other systems, and similarity to systems previously evaluated. This review also verifies that the following are considered in the applicant's design: A. Provisions to automatically terminate flow to the RWCS following liquid poison injection into the reactor water. B. Provisions to automatically terminate flow to the cleanup demineralizers if the nonregenerative heat exchanger effluent temperature exceeds the resin operating temperature limits. C. Provisions for automatically maintaining flow through filter / demineralizer units in the event system flow decreases to a point where the bed may drop from the septum. 5.4.8-9 Revision 3 - March 2007 D. Provisions for monitoring resin transfers to ensure 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. The system capacity and processing flexibility are reviewed and the following items are considered: A. The process equipment, resin types, bed volumes, and RWCS capability are compared to those of similar reactors. B. The design flows and temperatures through the system to ensure that