Investigation of radioactivity in Ibaraki Prefecture, fiscal year 1994. 39

In this report, the results of the investigations of the environmental radioactivity and environmental radioactivity level around atomic energy facilities and the effect of atomic energy facilities to the sea, and the results of research, which were carried out by Environmental Pollution Research Center in one year from April, 1994 to March, 1995, are summarized. The environmental radiation monitoring plan of the Prefecture was revised, and the analysis of 14C in polished rice and Pu in sea products was performed. The course of environmental radioactivity monitoring in relation to the foundations of Japan Atomic Energy Research Institute and the nuclear fuel reprocessing plant is described. The situation of Tokai and Oarai districts and the outline of atomic energy facilities are reported. The objectives of the above described investigations and the basic policy of spatial dose investigation, environmental sample investigation and the investigation of water discharged from atomic energy facilities are explained. The plan of investigation is shown with tables and figures. The analysis and measuring methods and the instruments being used, the number of cases of measurement, and the results of the measurements are reported. (K.I.)