DIN 25413-2-1991《屏蔽混凝土按元件比例分类.第2部分:γ射线的屏蔽》
The atomic composition of concretes mentioned in this standard is intended to be applied in calculations for the construction of concrete shieldings with large attenuation factors in nuclear power plants, research reactors and other intensive gamma sources. Heat releases caused by gamma radiations in the shieldings are not subject of this standard.#,,#