Sodium-immersed electromagnetic pump design and development of large coil under high temperature

A sodium-immersed electromagnetic pump (EMP) has special features of high reliability, high maintainability and nonrestrictions for installation, in comparison with a mechanical pump. This type of EMP has the potential to simplify the FBR plant system by its application to the primary system. In this paper, a study on practical EMP application focusing on an EMP system and the structural concept, and a development of a coil under high temperature focusing on the electrical insulation system of a large coil are described. For practical EMP application, the system components and the structural concept for the modular double pool reactor are established. For development of a coil, heat cycle testing from the point of view of mechanical and electrical characteristics under high temperature is first carried out. It is confirmed that the electrical insulation characteristics for the first-step heat cycle test are adequate. (author)