Thermofluid MHD studies in a model of Indian LLCB TBM at high magnetic field relevant to ITER

Abstract

Numerical simulation of 3D MHD flow in a full scale variant of India propose Lead-Lithium cooled Ceramic Breeder (LLCB) Test Blanket Module(TBM) for ITER program has been carried out at high Hartmann number (Ha=17,845). The model geometry takes into account the integrated First wall (FW) which is provisioned with internal helium cooling channels for dual cooling purpose. The MHD effects on steady state velocity profile, modification of wall electric potential distribution due to electrical coupling of parallel channels has been analysed. Flow rate distribution in electrically coupled parallel channels has been obtained for a fixed PbLi flow rate in the common inlet header. Steady state thermofluid analysis has been performed using user defined heat density data obtained from neutronic estimation in similar variant. Prediction of thermal hot spots in various structural walls and sharing of heat load by coupled PbLi and First wall helium cooling circuit is presented.