Speaker
Description
For the buildings where radiation exists, such as nuclear power plants or accelerator facilities, concrete is not only used as structural materials but also widely used as shielding materials. On the other hands, only few discussions had conducted for the constant of shielding calculation. In addition, very old and/or foreign data have been used for the calculation, such as ANL-5800 and JAERI-M 6928, which had few information except for elemental composition. And some of the elemental fraction value are away from these of the actual concrete, typically Hydrogen. So major analyzed element data in various concrete samples used in actual facilities were presented, comparing the data in the past work, and were discussed referring the idea of concrete engineering. In addition, the recent activity of Standardization of concrete composite for radiation shielding in working group in AESJ would be introduced.