THERMODYNAMIC MODELING OF RADIONUCLIDE BEHAVIOR DURING HEATING (BURNING) OF RADIOACTIVE GRAPHITE IN THE AIR ATMOSPHERE

Describes the theoretical basis of thermodynamic modeling. The possibilities of the program complex TERRAfor the thermodynamic modeling of the behavior of radioactive graphite by heating (combustion) in the air has been studied. It is shown that the use of the methodology and thermodynamic modeling software package TERRA allows you to simulate and predict the phase and chemical transformations during heating (combustion). With the help of thermodynamic modeling method the behavior of radionuclides in radioactive graphite combustion in air was studied. It has been established that radioactive cesium is present as the condensed and vapor CsCl, radioactive calcium is in the form of condensed and vapor CaCl2, radioactive strontium is fused and vaporized SrCl2, radioactive beryllium is in the form of BeO and vapor BeCl2, radioactive nickel is present in the form of condensed and vapor NiCl2, radioactive uranium is in the form of condensed UO2, UOCl2, UOCl and vapor UCl4, plutonium is a condensed PuCl3, PuOCl, PuO, americium is in the form of condensed Am2O3 and AmO2, radioactive chlorine is condensed and vaporous compounds of uranium and vapor CaCl2, product combustion of carbon at temperatures above 900 K is CO and CO2 in a ratio of 1:1.