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At the Azgir nuclear test site in Western Kazakhstan 17 nuclear explosions were carried out at a depth of 165 to 1500 m, as well as ground explosions. Nine underground cavities with a total volume of about 1.2 million m3 with extremely high residual radioactivity were formed in the thickness of the rock salt layers. Five of the nine cavities are filled with groundwater and strontium, cesium and plutonium radionuclides are leaking into the environment, and radionuclides spread through food chains. A medical examina...