| 摘要 |
PROBLEM TO BE SOLVED: To provide a radiation shield vessel that accommodates a substance containing radioactive materials, and shields radiation rays emitted from the accommodated substance containing the radioactive materials.SOLUTION: A radiation shield vessel 1 for accommodating a substance 2 containing radioactive materials, includes a radiation ray absorption layer that absorbs radiation rays. The radiation ray absorption layer has a thickness calculated by the following formula (1), where x is a thickness of the radiation ray absorption layer, μ is an attenuation coefficient to a γ ray, &egr; is a proportional constant (primitive attenuation coefficient), &rgr; is mass volume density, Iis radiation intensity before transmission to the radiation shield vessel, and I is radiation intensity after transmission to the radiation shield vessel. |
