Forecasting device for air contamination concentration of in working environment

The device of the present invention forecasts contamination concentration of air in working environment, as one of information of radiation environment required upon planning of radiation management for operations under radiation such as periodical inspection in a nuclear power plant. That is, values of the actual result of each of the contamination concentration of air determined from past operation experiences such as periodical inspections are stored together with accompanying factors in a data bank of the device of the present invention. When the air contamination concentration of newly planned operation is estimated, information relevant to factors giving an effect on the air contamination concentration and evaluation of information are inputted. An estimation engine extracts the data coincident with inputted information from a data bank. All of extracted data are processed statistically to forecast the value of air contamination concentration at the objective operation. In the present invention, if the quantity of data stored in the data bank is increased, the application range is enlarged, and a forecast of high reliability can be conducted. (I.S.)