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Adsorption of 85Kr radioactive inert gas into hardening mixtures

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Abstract

Changes in volumetric activity of 85Kr radioactive inert gas take place in the atmosphere: it has increased by around 50% during the past 15 years. The main source of such gas is the operation of nuclear power plants and spent nuclear fuel reprocessing plants. 85Kr as an inert gas spreads throughout the entire atmosphere and its ionizing radiation may result in changes of atmospheric electric phenomena. Therefore it is necessary to control 85Kr emission into the atmosphere. However, there is no effective method for this as inert gases, under normal conditions, can hardly be adsorbed in different adsorbents and stored in special containers for a long period of time. This paper tries to show the possibility of keeping 85Kr longer within the adsorbent by changing its aggregate state: gas is adsorbed into liquid adsorbent and desorption takes place from solid adsorbent. For this purpose, an epoxy resin is used which, after adding a special hardener at room temperature, turns into a solid material with density of around 1.2 × 103 kg m−3. As a result of sample blending with substances which contribute to better solubility of 85Kr, diffusion coefficient of this gas (i.e. desorption speed) changes within the adsorbent in the solid state.

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Acknowledgments

Experimental research has been started at the Institute of Physics. Authors express their sincere thanks to the administration of the Institute of Physics for the material facilities, and also senior engineer Gintas Kandrotas and technician Jurijus Podoroga for their contribution in preparing the samples and conducting the research.

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Authors and Affiliations

  1. Department of Environment Protection, Vilnius Gediminas Technical University, Saulėtekio, 11, 10223, Vilnius, Lithuania

    D. Butkus

  2. Department of Mathematical Modelling, Vilnius Gediminas Technical University, Saulėtekio, 11, 10223, Vilnius, Lithuania

    J. Kleiza

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  1. D. Butkus
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  2. J. Kleiza
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Correspondence to D. Butkus.

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Butkus, D., Kleiza, J. Adsorption of 85Kr radioactive inert gas into hardening mixtures. J Radioanal Nucl Chem 287, 247–254 (2011). https://doi.org/10.1007/s10967-010-0691-5

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  • DOI: https://doi.org/10.1007/s10967-010-0691-5

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