~(210)Po是构成植物天然α放射性本底的主要核素,约占植物体总α强度的84％。 ~(210)Po是极毒放射性核素。人体最大允许负荷水平为0.03μci。据国外报道,人体每天的~(210)Po摄入量为4pci;其中由呼吸和饮水摄入各占1.5％左右,95％以上来源于食物。本工作的目的拟通过某铀矿区几种典 ~ (210) Po is the main radionuclide which constitutes the plant natural α radioactive background, accounting for 84% of the total α strength of the plant. ~ (210) Po is a very toxic radionuclide. The maximum allowable body load level is 0.03μci. According to foreign reports, the body daily intake of ~ (210) Po is 4pci; among them, about 1.5% is taken by breathing and drinking water, and 95% of them are from food. The purpose of this work is to pass several types of uranium mining area