Combustion of thin layers of metallic fuel in process of a surfaces decontamination

The technique for thermal decontamination of different materials (metal, asphalt, concrete) developed in the Moscow Scientific and Production Association RADON is discussed. The technique is based on application of the special powder material combustible under diffusion conditions in air with removal less than 1 % of total sample radioactivity. A mathematical model of the material thin layer combustion on a metal substrate in which the balance during combustion, accumulation of nitrides and oxides, oxidizing agent diffusive transport, as well as the thermal balance are taken into account is developed. The formulae giving an opportunity to process experimental data when verifying the suggested model applicability are derived