Document: NUREG-0800
Document ID: e6b7e6d3-a99d-424d-bfa0-491bc48f46cf
Document Type: srp
Title: ISOLATION CONDENSER SYSTEM (BWR)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0708/ML070810517.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.4.13
CFR Part: 
CFR Title: 

Content:
establishes requirements for the ECCS to be designed to permit appropriate periodic pressure and functional testing. The ICS is an ECCS and therefore must be designed to permit pressure and functional testing of components to assure the structural and leaktight integrity of its components, operability and performance of the active components of the system, and operability of the system as a whole under conditions as close to design as practical, as well as the full operational sequence that brings the system into operation, including operation of applicable portions of the protection system, and the transfer between normal and emergency power sources, and the operation of the associated cooling water system. 10. GDC 54 requires that piping systems that penetrate primary reactor containment be provided with leak detection, isolation, and containment capabilities having redundancy, reliability, and performance capabilities which reflect the importance to safety of isolating these piping systems. Such piping systems must be designed with a capability to test periodically the operability of the isolation valves and associated apparatus and to determine if valve leakage is within acceptable limits. Piping in the ICS passes through the containment boundary and is provided with isolation valves and integrity verification capabilities. Compliance with GDC 54's containment isolation and leak detection requirements provides a high level of assurance that the containment will perform its safety function in the event of a postulated accident and will maintain the capability to prevent a significant uncontrolled release of radioactivity. 11. 10 CFR 50.46 establishes acceptance criteria for ECCS for light-water nuclear power reactors as it relates to the calculated cooling performance being calculated in accordance with an acceptable evaluation model and sufficient to provide assurance that the most severe postulated LOCAs are calculated. The ICS is an ECCS. Therefore, its