Design and Analysis of Cooling Water for CFETR Busbar

When the IVC (In Vessel coil) BB (busbar) is energized, a large amount of heat is generated, which is usually cooled by circulating cooling water. This paper introduces the preliminary thermal design of CFETR (China Fusion Engineering Test Reactor) busbar cooling water. Due to the large design size of CFETR, longer cooling water pipes are required, which will result in a dramatic increase in pipe pressure drop. AFT Fathom code is used to simulate the whole process. During the numerical calculation, it is found that the pressure drop of the longest 4 busbars channel is too high and higher than the system requirements. Therefore, this paper proposes to reduce the pressure drop by dividing the pipe, and the results show that the decompression effect is good, which will provide a new idea for the design of cooling water system of nuclear fusion reactor.