The invention relates to a shielding device for a reservoir comprising a radioactive material and having an inlet and an outlet aperture, in particular a column for a radio-isotope generator, comprising a lead cover for the reservoir in which a closable access for the reservoir is recessed. The shielding device furthermore is provided with means which the device can be moved forward.

Es wird ein Verfahren zur Trennung von Technetium-99m von an Aluminiumoxid gebundenem Molybdän-99 mit Elutionsmitteln aus Nuklidgeneratoren beschrieben, in welchem dem Elutionssystem ein Kupfer-Salz, vorzugsweise ein Cu(II)-Saiz zugesetzt wird.

A nuclide transmutation device and a nuclide transmutation method which enable nuclide transmutation to be performed in a relatively small-scale device compared with large-scale devices such as accelerators and nuclear reactors, wherein the amount of nuclide transmutation can be increased. The nuclide transmutation device comprises a structure (1), and a high deuterium concentration unit (2) and a low deuterium concentration unit (2) disposed on either side of the structure (1) so as to sandwich the structure (1) therebetween, wherein an electrolytic solution (16) containing heavy water is supplied to the high deuterium concentration unit (2), the electrolytic solution (16) is electrolyzed to generate deuterium, thereby producing a state of high deuterium concentration near the high deuterium concentration unit (2) side surface of the structure (1) and placing the low deuterium concentration unit (3) in a state of low deuterium concentration relative to the high deuterium concentration unit (2), causing the deuterium to deuterium to penetrate through the structure (1) from the high deuterium concentration unit (2) toward the low deuterium concentration unit (3), and subjecting a substance to undergo nuclide transmutation to nuclide transmutation in the structure (1) by reaction with the deuterium.

A procedure for the preparation of radioisotopes consisting of a first step of electrodepositing a metallic isotope target to be irradiated on a target-holder element, a second step of irradiating the target, a third step of dissolving the target and a fourth set of purifying the radioisotope from the initial metallic isotope and from other possible radioactive and metallic impurities; the electrodeposition step in turn consisting of a dissolution operation in which the isotope to be irradiated is dissolved in a solution of HNO₃ with concentration from 0.5 to 2.5 M, a pH buffering operation, and a recirculation operation, in which the solution obtained above is circulated at a rate from 0.5 to 3 within an electrolytic cell during the current output within the cell itself; the electrodeposition of the target to be irradiated occurs within the electrolytic cell during the recirculation operation.

The present invention produces nuclide transmutation using a relatively small-scale device. The device (10) that produces nuclide transmutation comprises a structure body (11) that is substantially plate shaped and made of palladium (Pd) or palladium alloy, or another metal that absorbs hydrogen (for example, Ti) or an alloy thereof, and a material (14) that undergoes nuclide transmutation laminated on one surface (11A) among the two surfaces of this structure body (11). The one surface (11A) side of the structure body (11), for example, is a region in which the pressure of the deuterium is high due to pressure or electrolysis and the like, and the other surface (11B) side, for example, is a region in which the pressure of the deuterium is low due to vacuum exhausting and the like, and thereby, a flow of deuterium in the structure body (11) is produced, and nuclide transmutation is carried out by a reaction between the deuterium and the material (14) that undergoes nuclide transmutation.