| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a transport-cum-storage cask for radioactive material in which a gamma ray shielding layer composed of lead or lead alloy is hard to deform. <P>SOLUTION: A transport-cum-storage cask comprises: an inner shell 8; an outer shell 9; and a circular gamma-ray shielding layer 10 and a circular neutron-shielding layer 11, both of which are placed in between the inner shell 8 and the outer shell 9. The gamma-ray shielding layer 10 is formed, by aligning a plurality of gamma-ray shielding blocks 12 composed of lead in a block shape along a circumferential direction. The each gamma-ray shielding block 12 is covered, over the entire axial direction, with a copper tube 16, having a higher elasticity limit than that of the gamma-ray shielding block 12. <P>COPYRIGHT: (C)2012,JPO&INPIT |
