GAS PHASE CONVERSION OF UN AND UC IN NITRATING ATMOSPHERE

摘要

The gas-phase conversion of UN and UC into water-soluble compounds in the atmosphere NOx-H2O (vapor)-air and HNO3 (vapor)-air in the interval 298-423 K was investigated. It is shown that in the gasphase conversion process UN is converted into water-soluble compounds (nitrates, hydroxy nitrates). It is found that the gas-phase conversion of UN in the atmosphere NOx-H2O (vapor)-air is less efficient than in the atmosphere HNO3 (vapor)-air. In the process of gas-phase conversion of UC in a nitrating atmosphere the main products of conversion are uranyl nitrate hydrates. In addition, carbon-containing products are formed and their removal requires ozonation of the solutions formed as a result of contact between water and the products of UC conversion.