The restoration of radioactive-contaminated territories of Belarus after Chernobyl catastrophe

After Chernobyl catastrophes the system of radiation monitoring of the environment in Belarus has ensured the collection and analysis of information about radioactive contamination of an atmospheric air, surface waters and territories. These results of radiation monitoring are used for an estimation of a radiation condition of a environment and prognosis it of restoring. The analysis of results of monitoring shows, that in the first period after catastrophe the maximum levels of a exposure gamma-ray dose in cities were fixed in Bragin (April 30, 1986). The numerical prognosis shows, that the restoring of this magnitude lakes before catastrophe is possible to expect approximately in 65 years. The map of contamination of Belarus by Cs-137 was constructed about use Geo Information System based of results of monitoring, which are introduced in an automated data bank. Due to use GIS the prognosis of restoring of the contaminated territories, contaminated by Cs-137 to 2016 and 2046 was obtained. The analysis of dynamics of squares of contamination more than 37 kBq/sq.m for period 1986 - 2046 shows: The square of initial contamination (1986) by Cs-137 more than 37 kBq/sq.m was equaled 23,7 %; In 30 years (2016) squares of contamination will make approximately 16 %, i.e. will decrease in 1,5 on a comparison 1986; In 60 years (2046) squares of contamination will make approximately 10 %, i.e. will decrease in 2,4 on a comparison 1986. The prognosis of space distribution of activity Am-241 in Belarus shows, that the high levels of contamination will be in 30-km to a zone Chernobyl NPP and on around territories, where the population lives. Maximum volumes the activity of Am-241 will achieve to 2060 and will exceed activity of Pu-238,239,240 approximately in 2 times