An Uncertainty Analysis fora Head End Process in the Pyroprocessing

Abstract

Introduction Pyroprocessing technology, currently being developed in the Republic of Korea, transforms the spent fuels of a light water reactor into fresh MOX fuels for a sodium cooled fast reactor. It is important to manage nuclear material control in a pyroprocessing facility that treats nuclear materials such as U and Pu in view of safeguard. Until spent fuel assemblies transported from nuclear power plants are disassembled, and quantitative management of nuclear materials is carried out using a bulk item unit. However, quantitative management of nuclear materials is carried out in a unit of weight after the spent fuel assemblies are disassembled. Since the uncertainty that occurs when the quantitative management of nuclear materials is carried out in a unit of weight rather than by bulk item is relatively large, various methods are being developed for accurate quantitative management of nuclear materials to reduce the uncertainty of nuclear materials for safeguard measures.