CEFR主容器是不可更换的一级核安全设备,为了确保堆安全,需对其加工工艺,特别是焊接工艺进行各项性能的评定,颈部支撑焊接件在钠蒸汽中的抗晶间腐蚀性能是其中之一。1试验方法试验在高温钠热对流回路的汽相试验段中进行。主容器颈部材料为瑞典进口的316不锈钢,颈部支撑5083钢为 The main CEFR container is a non-replaceable first-level nuclear safety equipment. In order to ensure the safety of the reactor, it is necessary to evaluate the performance of its process, especially the welding process. The intergranular corrosion resistance of the neck support welds in sodium vapor Is one of them. 1 Test Method The test is carried out in the vapor phase of the high temperature sodium convection loop. The main container neck material imported from Sweden 316 stainless steel, neck support 5083 steel