Optimization of coolant flow distribution for CFETR helium cooled solid breeder blanket

摘要

As a candidate of tritium breeding blanket for Chinese Fusion Engineering Test Reactor (CFETR), a helium cooled solid breeder blanket was proposed. The heat deposited on the blanket is cooled by the helium distributing from the manifolds and flowing in the internal channels of cooling components. To make the temperature of the various blanket components within allowable limits, accurate flow control of helium for the coolant channels should be guaranteed. In this paper, the mass flow rates of helium feeding into the coolant channels were obtained by numerical simulation. The results showed that the helium can be distributed relatively uniform into the first wall channels. However, the mass flow rates of some channel inlets of the other components greatly deviated from the theoretical values. Based on structural improvement of the manifolds, the maximum deviations of flow rate were decreased by almost an order of magnitude. (C) 2015 Elsevier B.V. All rights reserved.