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Safety operation of chromatography column system with discharging hydrogen radiolytically generated

In this study, behaviors of gas inside the extraction chromatography column were investigated through experiments and Computation Fluid Dynamics (CFD) simulation. N2 gas once accumulated as bubbles in the packed bed was hardly discharged by the flow of mobile phase. | Safety operation of chromatography column system with discharging hydrogen radiolytically generated EPJ Nuclear Sci. Technol. 1 9 2015 Nuclear Sciences S. Watanabe et al. published by EDP Sciences 2015 amp Technologies DOI 10.1051 epjn e2015-50006-1 Available online at http www.epj-n.org REGULAR ARTICLE Safety operation of chromatography column system with discharging hydrogen radiolytically generated Sou Watanabe Yuichi Sano Kazunori Nomura Yoshikazu Koma and Yoshihiro Okamoto Japan Atomic Energy Agency 4-33 Muramatsu Tokai-mura Naka-gun Ibaraki 319-1194 Japan Received 30 April 2015 Received in final form 18 September 2015 Accepted 5 October 2015 Published online 09 December 2015 Abstract. In the extraction chromatography system accumulation of hydrogen gas in the chromatography column is suspected to lead to fire or explosion. In order to prevent the hazardous accidents it is necessary to evaluate behaviors of gas radiolytically generated inside the column. In this study behaviors of gas inside the extraction chromatography column were investigated through experiments and Computation Fluid Dynamics CFD simulation. N2 gas once accumulated as bubbles in the packed bed was hardly discharged by the flow of mobile phase. However the CFD simulation and X-ray imaging on g-ray irradiated column revealed that during operation the hydrogen gas generated in the column was dissolved into the mobile phase without accumulation and discharged. 1 Introduction Gas and heat are considered to be generated at the adsorption band of MA simultaneously. An increase in The extraction chromatography technology is one of the temperature of the mobile phase will lead to a decrease in promising methods for the partitioning of minor actinide the solubility of H2 gas into it thus heat from radioactive MA Am and Cm from spent nuclear fuel 1 and Japan elements has also to be discharged as fast as possible. Our Atomic Energy Agency JAEA has been conducting previous study has shown that flow of the