Prospects for Using Weakly Dissociated Ion Exchange Resins in Special Water Treatment Systems at VVER-Based Nuclear Power Plants for Reducing the Volume of Radioactive Waste Generated

Vinnitskii, V. A.; Chugunov, A. S.; Nechaev, A. F.

doi:10.1134/s0040601518040109

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…CCEs are used primarily for the removal of cations from basic solutions (dealkalization, softening of high salinity waters), for the splitting of weakly alkaline salts of polyvalent cations, and also for the isolation and purification of biochemicals such as antibiotics, vitamins, alkaloids, and enzymes [ 51 , 52 , 53 , 54 , 55 ]. The use of CCEs for reducing the volume of radioactive waste generated in nuclear power plants was also considered [ 56 , 57 ].…”

Section: Introductionmentioning

confidence: 99%

Copper Rich Composite Materials Based on Carboxylic Cation Exchangers and Their Thermal Transformation

et al. 2021

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The effect of a cupric deposit (Cu2+, CuO) on the thermal decomposition of carboxylic cation exchangers (CCEs) is not known, and such studies may have practical significance. CCEs have a very high ion exchange capacity, so an exceptionally large amount of CuO (which is a catalyst) can be precipitated inside them. Two CCEs, macroreticular (Amberlite IRC50) and gel-like (Amberlite IRC86), served as a polymeric support to obtain copper-rich hybrid ion exchangers. Composites with CuO particles inside a polyacrylic matrix (up to 35.0 wt% Cu) were obtained. Thermal analyses under air and under N2 were performed for CCEs in the H+ and Cu2+ form with and without a CuO deposit. The results of sixteen experiments are discussed based on the TG/DTG curves and XRD patterns of the solid residues. Under air, the cupric deposit shifted the particular transformations and the ultimate polymeric matter decomposition (combustion) toward lower temperatures (even about 100–150 °C). Under N2, the reduction of the cupric deposit to metallic copper took place. Unique composite materials enriched in carbonaceous matter were obtained, as the products of polymeric matrix decomposition (free radicals and hydrogen) created an additional amount of carbon char due to the utilization of a certain amount of hydrogen to reduce Cu (II) to Cu0.

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Section: Introductionmentioning

confidence: 99%

Copper Rich Composite Materials Based on Carboxylic Cation Exchangers and Their Thermal Transformation

et al. 2021

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Microbial D-lactic acid production, In Situ separation and recovery from mature and young coconut husk hydrolysate fermentation broth

Din

Maskat

Zaini

2022

Biochemical Engineering Journal

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Radioactive waste management in PWR technology: some technical solutions for liquid radioactive media processing systems of the “nuclear island”

Vinnitskii

Chugunov

2020

J. Phys.: Conf. Ser.

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The present research is aimed at solving an urgent practical problem – to minimize the volume of the radioactive waste from nuclear power plants in the place of their generation. The modernization of the complexes for handling water streams containing radionuclides seems to be the most acceptable solution. The systems developed in the 1960s for the chemical support of the safe operation of the reactor plant and the radioactively contaminated water processing no longer meet the established requirements, primarily in terms of the volume and quality of radioactive waste subject to “eternal” isolation. The search for a reasonable compromise between the amount of waste generated during the operation of systems to ensure the safe operation of nuclear power plants and the theoretically achievable volume of radioactive waste can be considered as the current agenda. The ratio between these indicators will shift as the material and technical base of the available materials and devices is steadily improving, the base itself has significantly expanded over the past time. In this regard, the most urgent is the change in methodological approaches to the organization of chemical technological systems of NPP. First of all, this refers to the advisability of abandoning universal systems in favor of specialized ones adapted to the chemical composition of the processed “raw material”. Separate collection of liquid radioactive waters basing on the principle of chemical composition similarity will allow to use low productivity systems. In this case, local systems can be used only once. The article presents some approaches to the organization of systems capable of providing a radical reduction in the intake of ballast salts in the composition of radioactive waste.

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Prospects for Using Weakly Dissociated Ion Exchange Resins in Special Water Treatment Systems at VVER-Based Nuclear Power Plants for Reducing the Volume of Radioactive Waste Generated

Cited by 3 publications

References 7 publications

Copper Rich Composite Materials Based on Carboxylic Cation Exchangers and Their Thermal Transformation

Copper Rich Composite Materials Based on Carboxylic Cation Exchangers and Their Thermal Transformation

Microbial D-lactic acid production, In Situ separation and recovery from mature and young coconut husk hydrolysate fermentation broth

Radioactive waste management in PWR technology: some technical solutions for liquid radioactive media processing systems of the “nuclear island”

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