抄録
Understanding of environmental radioactivity has progressed by investigation of undesirable events: nuclear explosion tests and nuclear accidents. Now the importance of the research on environmental radioactivity has realized widely because of an increasing use of nuclear energy. One of the tops of the current research is construction of models, which explain and predict behavior of radionuclides released to the environment . Parameters of mathematical equations used in the model require reliable values, which must be determined by environmental analysis and laboratory experiments. Development of analytical instruments and techniques would make possible to obtain more reliable values of the parameters.
