MOX fuel cladding tube reutilization method

The invention relates to the technical field of nuclear fuel element preparation, and particularly discloses an MOX fuel cladding tube reutilization method which comprises the following steps: cuttingoff a lower end plug on an assembly weldment, reprocessing the lower end plug, and ensuring that the total length of the assembly weldment is not changed after the reprocessed lower end plug and thecut cladding tube are assembled and welded. The MOX fuel cladding tube after the lower end plug fails to be welded is cut, and the end plug is lengthened to ensure that the total length of the fuel rod is unchanged, so that the utilization rate of the cladding tube is increased. 本发明涉及核燃料元件制备技术领域，具体公开了一种MOX燃料包壳管重利用方法，将组焊件上的下端塞切掉后，重新加工下端塞，并确保重新加工后的下端塞与切割后的包壳管装配并焊接后，组焊件总长度不变。本发明通过对下端塞焊接失败后的MOX燃料包壳管进行切割，采用端塞加长保证燃料棒总长不变的方式，提高了包壳管的利用率。