1986•University of North Texas Digital Library (University of North Texas)Open access

Impacts of reactivity feedback uncertainties on inherent shutdown in innovative designs

Charles J. Mueller

Abstract

The concept of ''inherent shutdown'' is emphasized in the approach to the design of innovative, small pool-type liquid metal reactors (LMRs). This paper reports an evaluation of reactivity feedback uncertainties used in the analyses of anticipated transients without scram (ATWS) for innovative LMRs, and the associated impacts on safety margins and inherent shutdown success probabilities on unprotected loss-of-flow (LOF) events. It then assesses the ultimate importance of these uncertainties on LOF and transient overpower (TOP) events in evolving metal and oxide innovative designs.

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Key concepts: Scram, Shutdown, Transient (computer programming), Reactivity (psychology), Nuclear engineering, Reliability engineering, Environmental science, Computer science