Compositions – Radioactive compositions – Nuclear reactor fuel
Patent
1983-04-12
1985-12-31
Lechert, Jr., Stephen J.
Compositions
Radioactive compositions
Nuclear reactor fuel
55 66, 55 67, 55 68, 55 75, 55 76, 55DIG9, 423235, G21F 902
Patent
active
045620008
ABSTRACT:
A process for the separation of krypton from a radioactive waste gas mixt which is released during the chemical dissolution of burned-down nuclear fuel particles, and which in a carrier gas such as air, in addition to krypton, also contains xenon, argon, nitrous oxide and residual gas components. The waste gas mixture flowing out from a resolver has xenon removed therefrom after purifying the waste gas of nitrous oxides and radioactive residual gas components, such as aerosols, iodine, tritium and carbon(C-14) dioxide; and wherein krypton is finally withdrawn from the residual gas mixture and then stored. The invention also relates to an arrangement for the implementation of the inventive process. Subsequent to the purifying of the waste gas mixture from nitrous oxides and radioactive residual gas components, such as aerosols and iodine, a portion of the waste gas mixture is reconveyed into the resolver, and wherein the remaining portion of the waste gas mixture is purified of tritium and carbon(C-14) dioxide, and after an adsorptive removal of xenon discontinuously flows through a preparative gas chromatograph in which the krypton is separated from the residual gas. The remaining portion of the waste gas mixture is thereafter purified of tritium and carbon(C-14), which are removed in the form of HTO or, in essence, 14CO.sub.2, and thereafter adsorptively freed from xenon. The remaining waste gas mixture containing krypton is discontinuously conveyed to a preparative gas chromatograph in which the krypton is separated from the residual gas.
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Kernforschungsanlage Julich Gesellschaft mit beschrankter Haftun
Lechert Jr. Stephen J.
Locker Howard J.
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