<99>Mo sub-critical production device and method based on accelerator driving

Abstract

The invention discloses a <99>Mo sub-critical production device and method based on accelerator driving. The <99>Mo sub-critical production device based on accelerator driving comprises an acceleratorunit, a radiation production unit and a separation and purification unit; the accelerator unit sequentially comprises a high-energy particle source, a collimator, an accelerator, a target and a target cavity in an output direction; the high-energy particle source accurately bombards the target positioned in the target cavity at the center of the radiation production unit through the collimator and the accelerator to generate neutron; the radiation production unit adopts a concentric cylindrical structure and sequentially comprises neutron slowing layer, a neutron multiplying layer, a low enriched uranium salt solution and a neutron reflecting layer from inside to outside; and the low enriched uranium salt solution is placed into a fission reaction container to be sealed, the reflecting neutron generated by the target in the target cavity passes through the neutron slowing layer and the neutron multiplying layer to obtain high neutron flux and react with the low enriched uranium salt solution, the solution after reaction enters the separation and purification unit through a pipeline, and the neutron reflecting layer and a shielding layer are arranged sequentially from inside to outside, are positioned on an outer layer and are used for reducing neutron loss.

Description

Technical field [0001] The present invention relates to the technical field of isotope production, in particular to an accelerator-driven 99 Mo subcritical production device and method. Background technique [0002] 99m Tc is currently one of the most widely used medical radioisotopes, used by more than 40 million people worldwide each year 99m Tc is used for examination, and the demand is about 110,000 Ci / week, which accounts for more than 80% of the isotopes used in the nuclear medicine field. 99m Tc is mainly obtained by irradiating High Enriched Uranium (HEU) in the experimental reactor 99 Mo isotope decays. 99m The half-life of Tc is only 6.6h, so the nuclear medicine industry usually uses a longer half-life 99 Mo (its half-life is about 66h) is purified, transported and stored for later use, so 99 The stability of Mo supply directly determines 99m Market supply of Tc. [0003] traditional 99 Mo production methods include reactor fission method and neutron activation method. T...

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Problems solved by technology

[0008] In order to overcome the disadvantages and defects of the existing complex process, high cost, nuclear proliferation, etc., the present invention provides an accelerator-driven 99 Mo subcritical production device and method, induced by irradiating low-enriched uranium salt solution 235 U fission occurs 235 U(n,f) reaction to prepare medical radioisotopes 99 Mo

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