Practice of Krypton-85 Management in Foreign Reprocessing Plants and Its Enlightenment
Since Krypton-85 is the isotope with the highest activity emitted by the reprocessing plant,and can cause a higher collective dose in the world,since the 70s of the last century,countries represented by the United States have carried out scientific exploration and engineering practice on the separation and conditioning technology of Krypton-85.Technical routes represented by cryogenic distillation were developed,and safety problems of separation process and long-term storage were found.At the same time,due to the low radiotoxicity,the low contribution to the individual effective dose of the public,the safety problems and huge investment of krypton separation and conditioning engineered application,almost all krypton-85 is discharged into the environment as airborne effluent for dilution and diffusion in the reprocessing plants of France and the United Kingdom.In addition,although krypton-85 is a widely used isotope,its market size is much smaller than the annual emissions amount of krypton-85 in reprocessing plants.In summary,it is suggested that dilution and diffusion could be selected as the management scheme of Krypton-85 for China's reprocessing plants,referring to the management practices of Krypton-85 in France and the United Kingdom.
Krypton-85reprocessing plantmanagement schemeseparation and conditioningdilution diffusion
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