판형 핵연료집합체의 유동특성에 대한 수치해석적 연구

In nuclear reactors, it is important from the point of view of safety to provide adequate cooling of a fuel. Pressure drop and flow distribution are used as key factors. They were obtained by a numerical study of flow in a plate-type nuclear fuel assembly. In the top end fitting, effects of the sudden transition from the circular pipe to the rectangular duct and the fixing bar presence on the flow distribution in each channel were studied. The pressure drops along the assembly were compared with results of experiments.