Phase distribution and modes of occurrence percentage of microparticles in the groundwater at super(137)Cs, super(90)Sr, uranium, and transuranic elements

The phase distribution and modes of occurrence of isotopes super(137)Cs, super(90)Sr, uranium, and transuranic elements (plutonium super(238-240)Pu, americium super(241)Am) for the coarse solid phase, colloidal particles, and in a dissolved state, in the groundwater from three wells of the Chernobyl Nuclear Power Plant (ChNPP) industrial site for 2011-2012 are studied. The ground water flow is discharged into the estuary of the Pripyat' R. (Ukraine). The important role of microparticles with the size of 0.1-0.2 microns and colloidal particles with the size of 0.01-0.1 microns in the mechanism of migration of radionuclides from the surface layers of the soil into the groundwater. The main environmental threat from the migration of actinides is associated with man-made colloidal particles.