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Report No.

The Application for the inspection technique of concealed nuclear materials by plasma fusion neutron source

Haruyama, Mitsuo; Takamine, Jun ; Takase, Misao; Yamaguchi, Satoshi

When a radioactive waste package fixed by a material such as the cement is measured by using conventional active neutron method, the problems related to quantification accuracy comes from fact that radial sensitivity distribution in the region of surface and center is different more than 100 times. In order to resolve the problem, we developed the method to detect a nuclear fission neutron induced by the neutron which slowed down in the matrix itself. By using this new method, we performed a position sensitivity difference of 10%. Recently, the inspection method to prevent the smuggling of the fissile material at the water's edge is demanded around the world. Presently, we progress the research and development to apply this new method to the inspection. In this research, we confirmed its availability through computer simulation.



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