Velocity Distribution Analysis of an Electromagnetic Pump for the Active Safety-grade Decay Heat Removal System in the PGSFR

Abstract

An electromagnetic pump is analyzed using numerical analysis method for the verification of characteristics An electromagnetic pump is considered for the generation of sodium flow satisfying easy control of flow rate, because it is operated without contacting working sodium which has strong chemical reaction property. Also, it has simple structure which is good for safety and maintenance property. Therefore, it is used for the Active Safety-grade Decay Heat Removal System (ADHRS) of Prototype Gen-IV Sodium-cooled Fast Reactor (PGSFR) which releases heat from the primary system to the atmosphere of the final heat sink. In this study, as one of steps to estimate the characteristic of the electromagnetic pump with mass flowrate of 0.02 m3/min and developed pressure of 2.0 kPa respectively, velocity distribution 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 velocity distribution and design variables are verified.