Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Aizawa, Kosuke; Chikazawa, Yoshitaka; Kotake, Shoji; Ara, Kuniaki; Aizawa, Rie*; Ota, Hiroyuki*
Journal of Nuclear Science and Technology, 48(3), p.344 - 352, 2011/03
Times Cited Count：19 Percentile：79.99(Nuclear Science & Technology)This study investigates the adequateness of a modular-type EMP system for large-sized (1500 MWe class) sodium-cooled fast reactors. There is concern that such a large EMP will cause flow instability. A modular-type EMP system can solve this issue since smaller EMPs are arranged in parallel and the flow rate of each EMP is reduced. Parallel-module-EMP systems have been investigated as the primary and secondary circulating pumps. The results of the design study and electro-magnetic analysis on the primary main pump confirmed that flow instability does not occur under all operational conditions. The modular-type EMP system is also effective for the secondary system, drastically simplifying the piping arrangement. The results of this study show that the modular-type EMP system is highly compatible with the main circulating pumps of large-sized sodium-cooled fast reactors as well as the advantages gained from adopting this system.
Aizawa, Kosuke; Kotake, Shoji; Chikazawa, Yoshitaka; Ara, Kuniaki; Araseki, Hideo*; Aizawa, Rie*; Ota, Hiroyuki*
Proceedings of 2009 International Congress on Advances in Nuclear Power Plants (ICAPP '09) (CD-ROM), p.9402_1 - 9402_8, 2009/05
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.
