混凝土墙体防辐射砂浆的蒙特卡罗研究

摘要

By stuffing barite, lead tungstate and BaPb0.75 Bi0.25 O3 respectively to the mortar substrate according to certain proportion, three different anti-radiation mortars are obtained.Theγray transmissibility and the linear attenuation coefficient of the anti-radiation mortar concrete wall for these characteristic γrays emitted from natural radioactive series such as uranium, actinide and thorium are calculated by Monte Carlo numerical simu-lation method.It is shown that three different anti-radiation mortars play a role in preventingγrays, where it is the best with the tungstate mortar, and the thicker mortar layer is better in the prevention.%分别选取重晶石、钨酸铅和BaPb0．75 Bi0．25 O3这三种不同的防辐射填料按照一定的比例掺和到砂浆基材中，得到不同的防辐射砂浆。针对天然放射系铀系、锕系和钍系放出的特征γ射线，采用蒙特卡罗数值模拟方法计算了防辐射砂浆混凝土墙体的γ射线透射率与线性衰减系数。结果表明，三种不同防辐射砂浆对γ射线均有一定的防护作用，其中钨酸铅砂浆对γ射线的防护性能最好，且砂浆层厚度越厚，防护效果越好。