Radiometric detection of non-radioactive caesium flux using displaced naturally abundant potassium
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We report on a method that allows for the radiometric detection of non-radioactive caesium by the measurement of potassium ions displaced from an ion exchange barrier. Electrokinetic transport of K+ and Cs+ through concrete samples was measured using a bespoke scintillation detector to monitor electrolyte concentrations. Results show experimental ionic flux and diffusion parameters of non-active caesium (~1 × 10−5 mol m−3) were consistent with those recorded for potassium and also with values reported in relevant literature. This work demonstrates a novel concept that can be applied to proof-of-concept studies that help develop the next generation of nuclear decommissioning technologies.
KeywordsNuclear decommissioning Gamma spectroscopy 137Cs Non-hazardous radioactive tracer Ion exchange
This work was funded by the United Kingdom’s Nuclear Decommissioning Authority (NDA) through a PhD bursary for Andrew Parker. Colin Boxall is supported by the Lloyd’s Register Foundation, an independent charity that supports the advancement of engineering related education, and funds research and development that enhances the safety of life at sea, on land, and in the air.
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