Study
Internal exposure from insoluble particles
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After the Fukushima Daiichi nuclear accident, insoluble particles of radioactive cesium have been detected around the site.
Insoluble particles have high specific activity (radioactivity per mass), and when they are taken into the body,
the radioactivity does not dissolve or diffuse in tissue fluid or blood.
Therefore, in order to elucidate the biological effects of insoluble fine particles (cesium-containing fine particles)
with relatively high specific activity after heterogeneous internal exposure,
we are proceeding with cell experiments and analysis using PHITS.
We also developed a method for probabilistically expressing the behavior of insoluble fine particles in the body and evaluating the dose,
and analyzed the fluctuation of the exposure dose due to the characteristics of individual particles.
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| Reference [1] K. Manabe et.al. , J. Nucl. Sci. Tech., 56, 78-86 (2019). [2] Y. Matsuya et al., Sci. Rep. 9, 10365 (2019). [3] Y. Matsuya et al., Cancers 14, 1045 (2022). |
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