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Kai, Takeshi; Sato, Tatsuhiko; Liamsuwan, T.*; Nikjoo, H.*
no journal, ,
A general purpose particle transport simulation code, PHITS is expected to apply dose evaluation in macroscopic systems as well as radiation interaction investigation in nanoscale for study of interaction between radiations and materials. To clear the problem, we implemented track structure calculation codes into the PHITS. The codes make microscopic behavior as well as energy depositions (ionization and excitation) of the electrons, protons and carbon ions possible. The PHITS could evaluate radiation dose of cellar size. As this implementation, DNA damage predictions, which need radiation interaction in the molecular levels, will be expected using this track-structure simulation mode.
Kai, Takeshi; Matsuya, Yusuke; Sato, Tatsuhiko
no journal, ,
A general purpose particle transport simulation code, PHITS is expected to apply dose evaluation in macroscopic systems as well as radiation interaction investigation in nanoscale for study of interaction between radiations and materials. To clear the problem, we developed track structure mode codes of the PHITS. We predicted yields of the DNA damage by the mode. We found that the mode could reproduce experimental results of the DNA damage yields by electron irradiation into the cells. The PHITS could evaluate radiation dose of cellar size. The track structure mode made the prediction of DNA damage yields possible.
Endo, Yuya; Yamaguchi, Katsuhiko*; Takase, Tsugiko*; Uezu, Yasuhiro; Tsukada, Hirofumi*
no journal, ,
After the Fukushima Dai-ichi Nuclear Power Station accident, the Ministry of the Environment decided that the additional annual dose in a high exposure situation (less than 20 mSv/y) reduced to 1 mSv/y or less. The additional annual dose is calculated by ambient dose equivalent. However, the relationship among air kerma, ambient dose equivalent and effective dose seems to be identically by many people. In addition, conversion coefficients from air kerma and ambient dose equivalent to effective dose have been considered to change as time proceeds because the half-lives of 
Cs and 
Cs are different. Therefore, agricultural land in an evacuation zone was selected to evaluate relationship among them. Furthermore, the actual environment such as soil will be simulated by using a Monte Carlo radiation transport code PHITS. Finally, the relationship will be verified by comparing the results calculated by PHITS to ones obtained from actual environmental monitoring.
Endo, Yuya; Uezu, Yasuhiro; Takase, Tsugiko*; Yamaguchi, Katsuhiko*; Tsukada, Hirofumi*
no journal, ,
no abstracts in English
Kai, Takeshi
no journal, ,
A general purpose particle transport simulation code, PHITS is expected to apply dose evaluation in macroscopic systems as well as radiation interaction investigation in nanoscale for study of interaction between radiations and materials. To clear the problem, we developed track structure mode. The PHITS could evaluate radiation dose of cellar size. The track structure mode made the prediction of DNA damage yields possible. In this presentation, we will introduce the method for utilization of the track structure mode to get new users.