The Study on Sloshing of Lead-bismuth Pool Reactor Under Seismic Excitation
Lead-bismuth heavy metal fluids tend to slosh in the reactor and cause damage to the reactor structure under seismic excitation,and it is of great significance to study this phenomenon.In this paper,the upper plenum of lead-bismuth reactor is employed as geometric model,and numerical simulation is carried out on the in-house CFD computing platform.In order to meet the compact design requirements of lead bismuth reactors,the arrangement of internal components has been optimized and the simulation results are compared.The research results show that the optimized structure has no obvious effect on sloshing suppression when the excitation frequency is low.As the excitation frequency increases,the sloshing suppression effect is gradually enhanced,and the severe sloshing mode is transformed into a relatively stable rotational sloshing mode.This paper has studied the sloshing phenomenon of the lead-bismuth pile under different working conditions,optimized the arrangement of the internal components,and verified the rationality of the improvement effect,which has provided guidance for the design of the lead-bismuth reactor.
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