Study of an electromagnetic pump applied to a primary main pumps of a large scale sodium cooled reactor

Aizawa, Kosuke ; Kotake, Shoji; Chikazawa, Yoshitaka  ; Ara, Kuniaki ; Araseki, Hideo*; Aizawa, Rie*; Ota, Hiroyuki*

This paper describes a future innovative design options with a parallel electromagnetic pump (EMP) system as the main circulating pump of the JSFR design. A conceptual design of EMPs integrated with an intermediate heat exchanger (IHX) is carried out. The major design parameters are consistent with the current JSFR design, where the main flow rate is 630 m/min and the flow halving time is the same of the mechanical pump with the similar reliability. As a result of several design studies, a five parallel EMPs with IHX system has been selected from the geometry suitability for JSFR design. The EMP advantages comparing with mechanical pumps are investigated from the views of in-service inspection, maintenance and reliability. Numerical analysis with two dimensional MHD codes is conducted on a former experiment of a 160 m/min flow rate EMP. The overall trend of the experimental data and the numerical results agrees with that in small-scale EMPs.