[3I01-08] Radiation Behavior

[3I06] Discussion on the Standardization of Shielding Material focusing on Shielding Concrete.

(23)The Study of the Affection to Bulk Dose Rate by Fluctuation of Chemical Contents in Concrete.

*Toshio Amano¹, Mikihiro Nakata², Kazuaki Kosako³, Masahiro Yoshida⁴, Tatsuya Osawa⁵, Kentaro Yoshioka⁶, Hidenori Kawano⁷, Satoshi Takeo⁸, Koji Oishi⁹, Yoshihiro Hirao¹⁰ (1. ITOCHU Techno-Solutions Corporation, 2. MHI Nuclear Development Corporation, 3. SHIMIZU CORPORATION, 4. NUCLEAR Safety Technology Center, 5. Mitsubishi Heavy Industries, Ltd., 6. Toshiba Energy Systems & Solutions Corporation, 7. ATOX Corporation, 8. Hitachi-GE Nuclear Energy, Ltd., 9. JAPAN ENVIRONMENT RESEARCH Corporation, Ltd., 10. National Maritime Research Institute)

Keywords:Radiation shielding, Concrete, Material composition, Attenuation factor, Dose rate

A working group of Standards Committee in Atomic Energy Society of Japan has been discussing standard material compositions of concrete for shielding calculations. Based on this standard composition of concrete, the affection to bulk dose rate by assumed fluctuation of concrete chemical contents is investigated. In this presentation the results of this study for deep penetration of neutrons and photons are reported considering radiation sources in reactor facilities, medical accelerator facilities and electron LINAC facilities with energy below 20MeV.