This report was written as part of a United States Department of Energy (DOE), Office of Nuclear Energy, Advanced Reactor Technologies program funded project to re-create the capabilities of the legacy Centralized Reliability Database Organization (CREDO) database. The CREDO database provided a record of component design and performance documentation across various systems that used sodium as a working fluid. Regaining this capability will allow the DOE complex and the domestic sodium reactor industry to better understand how previous systems were designed and built for use in improving the design and operations of future loops. The contents of this report include: overview of the current state of domestic sodium reliability databases; summary of the ongoing effort to improve, understand, and process the CREDO information; summary of the initial efforts to develop a unified sodium reliability database called the Sodium System Component Reliability Database (NaSCoRD); and explain both how potential users can access the domestic sodium reliability databases and the type of information that can be accessed from these databases.

Creation of the NaSCoRD Database

This paper presents component failure rate data for use in assessment of liquid metal cooling systems. Best estimate data applicable to fusion liquid metal coolants is presented. Repair times for similar components are also referenced in this work. These data support probabilistic safety assessment and reliability, availability, maintainability and inspectability analyses

/pdf/reliability-and-maintainability-data-for-liquid-metal-dbzefvx783.pdf

Reliability and maintainability data for liquid metal cooling systems

This paper presents component failure rate data for use in assessment of lead lithium cooling systems. Best estimate data applicable to this liquid metal coolant are presented. Repair times for similar components are also referenced in this paper. These data support probabilistic safety assessment and reliability, availability, maintainability, and inspectability analyses.

Reliability and Maintainability Data for Lead Lithium Cooling Systems

In this paper, data from the Centralized Reliability Data Organization (CREDO) are used to calculate failure rates and unscheduled maintenance frequencies for liquid metal valves. These failure rates and unscheduled maintenance frequencies are then compared to those calculated for valves from light water reactors. The liquid metal valves showed, in general, failure rates and unscheduled maintenance frequencies that are significantly lower than those of water valves (sometimes as much as an order of magnitude). Two possible reasons for the trend of lower failure rates and maintenance frequencies for liquid metal valves are then discussed.

CREDO analysis: a comparison of liquid metal and water valve reliabilities

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CREDO analysis: a comparison of liquid metal and water valve reliabilities