Melting Decontamination of Radioactive Scrap Metal by Graphite Arc Melter

Optical Emission Spectroscopy Measurements and Simulation of Radioelement Volatility During Radioactive Waste Treatment by Plasma

“…In the frames of the approximations above of the OES technique, (7) can be readily used for the measurements, provided the temperature T 0 is known; however, for the experimented temperature field, metal atoms parameters (E k and E i * kT, Q = const.) do not satisfy the approximation conditions to allow the transformation of (2) to (7). For this reason a numerical model has been developed for the evaluation of the recorded spectral line intensities using LTE hypotheses and temperature distribution given by (5) with the T 0 value measured from the two argon lines ratio.…”

“…Furthermore, plasma processes may allow separation of hazardous materials (e.g., radioactive) from non hazardous materials with different thermal characteristics, and immobilization of the radioactive material in a non-leaching glassy slag [5][6][7]. In addition smaller, mobile plasma waste treatment plants sound very attractive because they allow elimination of waste transportation cost and reduce investment and labor costs.…”

“…In addition smaller, mobile plasma waste treatment plants sound very attractive because they allow elimination of waste transportation cost and reduce investment and labor costs. Several plasma processes have been developed for compaction of LLRW, and few competing processes are available [6][7][8].…”

Feasibility verification analysis of glass curing using an ultra-high power laser

“…Based on the above situation, glass curing methods seem to treat highly radioactive waste very well. Because it can fix a series of nuclides and other pollutants (such as heavy metal ions, complex organic matter and mixed waste) [4] .Moreover, the resulting waste forms of glass products can easily be safely stored in the special underground storage due to their low size and highly chemical durability [5][6] .As one of the best ways to deal with highly radioactive waste, glass curing has been used on an industrial scale in some countries (such as France, Germany and the United States) [7][8] . However, at present, glass curing is mainly used for the treatment of low-and medium-sized radioactive waste [9] , and there is relatively little research and application for the treatment of highly-radioactive waste.…”

Study of 239Pu, 144Ce, and 90Sr Behavior During Radioactive Wastes Treatment by Thermal Plasma Technology

“…Thermal plasma technology combines the advantages of incinerating the combustible parts of radioactive wastes for volume reduction and of vitrifying the noncombustible counter parts simultaneously into glassy slags with very low leaching rate [3,4]. The problem of radioactive wastes vitrification by arc plasma is the volatility of radioelements (e.g., Cs, Co, Ru, Ni) which end up leaving the furnace and reaching the filtering units and the washing column [5].…”