长期以来,人们普遍认为反应堆,特别是反应堆发生失水事故时释放的裂变产物放射性碘-131是污染环境的主要核素。因为它的比放射性高,产生量大,而且活泼,易挥发。但这一认识是根据其一般物理和化学性质得出的。1980年12月21日,美国核安全监督 For a long time, it is generally accepted that radioactive iodine -131, the fission product released during the accident of water loss in reactors, especially the reactor, is the main nuclide polluting the environment. Because of its high radioactivity, produce large, and lively, volatile. However, this understanding is based on its general physical and chemical properties. December 21, 1980, U.S. Nuclear Safety Supervision