- 著者
- Kosako Toshiso Sugiura Nobuyuki Yonehara Hidenori OKOSHI Minoru NAKAI Kunihiro
- 出版者
- 日本保健物理学会
- 雑誌
- 保健物理 : hoken buturi (ISSN:03676110)
- 巻号頁・発行日
- vol.40, no.1, pp.67-78, 2005-03
- 被引用文献数
- 1 1
Some of technologically enhanced naturally occurring radioactive material (TENORM), such as radon and monazite sand, gradually became a target for radiological protection. In order to regulate TENORM safely and economically, it is essential to consider the characteristics of TENORM such as ubiquity, huge volume, and very low activity levels. In this paper, radiation protection principles and standards for NORM/TENORM are summarized based on the reports published by the international organizations (e.g. ICRP and IAEA) to assist the development of national regulatory framework. The survey results on the present Japanese situations on industries related to NORM/TENORM are provided, and the categorization for NORM/TENORM, which is established by the Radiation Council of Japan, is explained how to control NORM/TENORM based on their exposure doses instead of their activity levels. Finally, basic processes to solve the problems related to NORM/TENORM are discussed.
- 著者
- FUJIMOTO KENZO YONEHARA HIDENORI YAMAGUCHI YASUHIRO ENDO AKIRA
- 出版者
- 日本放射線影響学会
- 雑誌
- Journal of Radiation Research (ISSN:04493060)
- 巻号頁・発行日
- vol.42, pp.85-93, 2001-12
- 被引用文献数
- 1 4
The NIRS staff interviewed the residents in the evacuated zone around the JCO facility in Tokai-mura on 19 and 20 November, 1999, to obtain the following parameters every 30 minutes starting from 10:35 A.M. on 30 September to 6:15 A.M. on 1 October: the distance from the precipitation tank, the type of the house, positions in the house, wall materials and their thickness in order to estimate individual doses due to the accident. The ambient dose equivalents were obtained based on monitoring data during the accident. In addition, computer calculations were conducted to evaluate the conversion factor from ambient dose equivalent to effective dose equivalent as well as the shielding effect of the house or factory to estimate the effective dose equivalent to the residents. The estimated individual doses based on the behavior survey were in the range from zero to 21mSv. The individual doses were reported to the residents during the second visit to each house and factory at the end of January, 2000.