Internal dose estimation considering the characteristics of insoluble caesium-bearing particles

Manabe, Kentaro   ; Matsumoto, Masaki*

If an insoluble cesium-bearing particle is incorporated into the body, the radioactivity in the particle will move stochastically in the state of a cluster without diffusion to the blood or tissue fluid. A deterministic method is applied to estimate internal doses for generic radioactive aerosols, but the deterministic method cannot be applicable to insoluble cesium-bearing particles. We established a stochastic method to estimate probability density functions of internal doses for intakes of insoluble particles by simulating the stochastic behavior of the particles. In this presentation, we will show the result of the probability density function of doses for particles having a typical size (diameter: 2 m). In addition, we will describe the parameters that affect probability density functions of doses, and future issues.