Neutron and Gamma Shielding Test and Its Analysis of Ductile Cast Packaging

Most of transport packagings for spent fuels have neutron shielding, made of water, resin, etc., which are arranged in a uniform layer in circumference of packagings. These structures can be easily made into shielding analytical model with high fidelity and these analytical models are supported by many shielding data.and analyses. However, it is scarcely reported neutron shielding test data of transport packagings with more complicated structure of neutron shielding. In this study the \"Zigzag\" neutron shielding structure with a ductile cast packaging body is chosen as the complicated shielding structure. Measurements and calculations of the \"Zigzag\" neutron shielding structure are performed and compared with the simplified model of this structure so as to discuss the differences between the actual complicated structure and the simplified model structure.