Ion-selective treatment as a method for increasing the efficiency of liquid radioactive waste reducing in accordance with acceptance criteria for disposal

2021 ◽  
Author(s):  
O. L. Tashlykov ◽  
A. P. Khomyakov ◽  
S. V. Mordanov ◽  
V. P. Remez
Keyword(s):  
Radioactive Waste ◽  
Liquid Radioactive Waste ◽  
Selective Treatment ◽  
Acceptance Criteria

Solidification of Radioactive Liquid Wastes: Treatment Options for Spent Resins and Concentrates

2009 ◽  
Author(s):  
Andreas Roth
Keyword(s):  
Ion Exchange ◽  
Radioactive Waste ◽  
Effective Treatment ◽  
Treatment Options ◽  
Liquid Radioactive Waste ◽  
Ion Exchange Resins ◽  
Acceptance Criteria ◽  
Liquid Wastes ◽  
High Concentrations ◽  
Exchange Resins

Ion exchange is one of the most common and effective treatment methods for liquid radioactive waste. However, spent ion exchange resins are considered to be problematic waste that in many cases require special approaches and pre-conditioning during its immobilization to meet the acceptance criteria for disposal. Because of the function that they fulfill, spent ion exchange resins often contain high concentrations of radioactivity and pose special handling and treatment problems.

Simulation of adsorption-coagulation purification of liquid radioactive waste to remove surfactants

2012 ◽  
Vol 85 (1) ◽  
pp. 46-51 ◽  
Author(s):  
M. G. Ivanets ◽  
T. A. Savitskaya ◽  
D. D. Grinshpan ◽  
N. G. Tsygankova ◽  
A. E. Savkin
Keyword(s):  
Radioactive Waste ◽  
Liquid Radioactive Waste

Immobilization of NPP evaporator bottom high salt-bearing liquid radioactive waste into struvite-based phosphate matrices

2021 ◽  
Vol 416 ◽  
pp. 125902
Author(s):  
Oleg A. Kononenko ◽  
Vitaly V. Milyutin ◽  
Vadim I. Makarenkov ◽  
Evgeny A. Kozlitin
Keyword(s):  
Radioactive Waste ◽  
Liquid Radioactive Waste ◽  
High Salt

scholarly journals Influence of Geopolymer Binder Components on Properties of Compounds during Cementation of Boron-Containing Liquid Radioactive Waste

2021 ◽  
Vol 21 (2) ◽  
pp. 71-77
Author(s):  
Yu. G. Fedorenko ◽  
◽  
Yu. A. Olkhovyk ◽  
A. N. Rozko ◽  
G. P. Pavlyshyn ◽  
...  
Keyword(s):  
Radioactive Waste ◽  
Liquid Glass ◽  
Potassium Hydroxide ◽  
Linear Equations ◽  
Liquid Radioactive Waste ◽  
Correlation Coefficients ◽  
Component Composition ◽  
Normative Values ◽  
Leaching Rate ◽  
Base Compound

The paper presents an analysis of the experimental results of the use of geopolymer binders for cementing boron-containing liquid radioactive waste (LRW). The dependence of the properties of compounds on the component composition of binders has been studied. The following components are considered: liquid glass with a silicon modulus of 2.9, a mixture of ash of Darnytsya TPP with slag of the Mariupol metallurgical plant in a ratio of 1: 1 and potassium hydroxide. To perform a factor analysis of the effect, the mass of these substances was taken as three factors in the analysis at two levels. For the manufacture of compounds imitation LRW was mixed with zeolite in a ratio of 10:1 at a temperature of about 60 оC. Subsequently, the above components were added to the mixture, the weight of which varied by ±17% relative to the weight of the base compound. To study the properties, samples of different sizes 5×5×5 cm, 1.5×1.5×1.5 cm and rectangular samples with an outer surface from 96 cm2 to 104 cm2 were made. Each property was studied in 8 samples. The obtained results allowed to construct linear equations that quantitatively link the corresponding characteristic of the compound with the composition of the binders. The correlation coefficients between the experimental and the data calculated by the equation are estimated. The average values of the correlation coefficients may indicate that not all factors were taken into account. The obtained regularities show that in the conditions of the experiment slag and ash increase, and liquid glass and potassium hydroxide reduce the rate of setting of the samples. The density of the samples is increased by ash and slag, while liquid glass and potassium hydroxide are reduced. The compressive strength of liquid glass and potassium hydroxide is reduced, while the mixture of ash and slag is increased. The leaching rate Сs of liquid glass and potassium hydroxide is increased, the mixture of ash and slag is reduced. At the same time, the leaching rate of Sr increases the ash/slag mixture, while liquid glass and potassium hydroxide decrease. The time during which the leaching of Cs reaches the normative values, slag and ash are reduced, and liquid glass and potassium hydroxide are lengthened. The obtained results can be taken into account when optimizing the composition of geopolymer binders for cementing LRW.

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