Thermal-Hydraulic Calculation and Test for Irradiation Target Assembly

In the paper, the geometry and mathematics model of the irradiation Target Assembly are built.COBRAⅢ C/MIT cod is used to calculate the flow rate and pressure drop curve of the irradiation Target Assembly, and the error of theoretic result and hydraulic test is 1.32%. The maximum temperatures on the surface and core of Irradiation Target Assembly are 66.6℃ and 72.7℃, which are less than the design limited value. The MDNBR（minimum departure from nucleate boiling ratio） is also calculated in the paper, which is 5.72 and more than the design limited value. The calculation result has significance for the safety analysis of Irradiation Target Assembly.