| 摘要 |
<p>Solns. of the waste prods. arising from the mfr. of fuel or breeder material for nuclear reactors and containing ammonium nitrate together possibly with urea, are treated so as to break down these cpds. into oxides of nitrogen. The solns of waste are sprayed whilst being heated to a temperature in the range of 300-600 degrees C. During this process the ammonium nitrate is broken down to N2, NO, N2O, NO2, and H2O, with the urea forming NH3, and CO2. Before being released into the atmosphere or possibly recycled for further use, they are freed from the water vapour contained in the non-volatile radioactive materials. Used for dealing with the byproducts such as ammonium nitrate arising from the precipitation of uranium, thorium and plutonium cpds, which are sparingly soluble, from nitrate solns. of their salts. These solns. contain small quantities of radioactive materials, and in the case of reprocessed fuels, prods. of fission, so that the ammonium nitrate can neither be used as fertiliser nor dumped. The process handles the solns. of waste, economically and without environmental hazard, without the formation of corrosive solns., and with waste vol. reduced to a min.</p> |
