| 摘要 |
PROBLEM TO BE SOLVED: To provide radioactive waste based on a vision that radiation intensity does not exceed a certain value.SOLUTION: The earth crust-like composition whose radiation intensity does not exceed a certain value is provided. The earth crust-like composition has the following D, &kgr;, &rgr;, and μthat are determinants of the surface radiation intensity satisfying the following expression. In the expression, Iis reference radiation intensity, D is a depth (a distance) from one end of the earth crust-like composition, Dis a depth (a distance) from one end to a center (or the other end) of the earth crust-like composition, &kgr; is a constant of proportion (a strength coefficient) unique to a material, &rgr;(D) is a concentration of radioactivity in the depth D from one end of the earth crust-like component to the depth (a distance) of D, and μis an attenuation coefficient unique to the material constituting the earth crust-like composition with respect to the radiation. |
