- 著者
- Mochamad Adhiraga PRATAMA Shogo TAKAHARA Shinji HATO
- 出版者
- 日本保健物理学会
- 雑誌
- 保健物理 (ISSN:03676110)
- 巻号頁・発行日
- vol.52, no.3, pp.200-209, 2017 (Released:2017-11-15)
- 参考文献数
- 37
- 被引用文献数
- 2
The purpose of this study is to identify the significance of the change in the intestinal absorption rate values the (ƒ1 value) to the change of ingestion dose coefficient following an acute intake of 134Cs and 137Cs. This study also attempted to provide a simple calculation method of ingestion dose coefficients given a specific value of ƒ1 and age groups by using linear regression models. In the range of 0-1, 10 different values of ƒ1 for 1-year, 5-year-old, and the adult group were chosen and used in a separate calculation by using, a biokinetic compartment model, DCAL. It was found that the lower values of ƒ1 lead to a significant decrease of the committed effective dose coefficient for an adult. Oppositely for children, the decrease of the coefficient was not as significant. This study also suggests that the significance of dose coefficient change due to the variation of ƒ1 substantially depends on the biological half-life of the radionuclide, the fraction of absorbed energy and the mass of organs and tissues in human body.
- 著者
- Shogo TAKAHARA Masashi IIJIMA Kazumasa SHIMADA
- 出版者
- 日本保健物理学会
- 雑誌
- 保健物理 (ISSN:03676110)
- 巻号頁・発行日
- vol.50, no.3, pp.172-181, 2015 (Released:2016-02-06)
- 参考文献数
- 30
- 被引用文献数
- 1
Radiation-induced cancer is one of the key issues in a consequence analysis on a Nuclear Power Plant accident. U. S. Nuclear Regulatory Commission (USNRC) developed the estimation model of those risks for the use of accident consequence analysis in 1980s and 1990s. This model is still used as a leading model in this field. In this paper, we aimed to explore the differences between the results of risk prediction from the model of USNRC and those from a latest model. To achieve this aim, radiation-induced cancer risks were projected based on the Japanese population statistics using the models developed by USNRC and the latest model, which was developed by U. S. Environmental Protection Agency (USEPA). As compared to the model of USEPA, the lifetime attributable risks of all cancers projected by the model of USNRC were about 30% higher for male and about 35% lower for female in both morbidity and mortality. When the sex-averaged values were compared between them, the difference is within 10%.