Characteristics Analysis of an Electromagnetic Pump for the Active Safety-grade Decay Heat Removal System in the Prototype Gen-IV Sodium-cooled Fast Reactor

Abstract

Active Safety-grade Decay Heat Removal System (ADHRS) of Prototype Gen-IV Sodium-cooled Fast Reactor (PGSFR) releases heat from the primary system to the atmosphere of the final heat sink. An electromagnetic pump which is used in the ADHRS is considered for the generation of sodium flow satisfying easy control of flow rate. Because it is operated not only contactless with working sodium which has strong chemical reaction property but also simple structure, it is good at safety and maintenance. In this study, as one of steps to estimate characteristics of the electromagnetic pump with mass flow rate and developed pressure are of 0.02 m3/min and 2.0 kPa respectively, characteristics in the narrow channel in which sodium flows is analyzed on the change of design variables based on magnetohydrodynamics. As a result, the relationships between characteristics and design variables are verified.