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Uranium foil target member of low enriched uranium for irradiation production fission <99>Mo

A 99mo, foil target technology, applied in the field of target preparation, can solve the problems of increased Pu content and aluminum content, and achieve the effects of reducing internal stress, ensuring integrity, and reducing radioactive pollution

Active Publication Date: 2017-06-20
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Production Fission of Low Enriched Uranium Targets and High Enriched Uranium Targets 99 The main difference between Mo is that if the same amount of 99 Mo, the content of uranium in the low-enriched uranium target is 5-6 times that of the high-enriched uranium target; the fission products of the low-enriched uranium target 239 The Pu content increases by 20-30 times, and the aluminum content also increases greatly. 99 The yield and purity of Mo pose great challenges

Method used

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  • Uranium foil target member of low enriched uranium for irradiation production fission &lt;99&gt;Mo
  • Uranium foil target member of low enriched uranium for irradiation production fission &lt;99&gt;Mo
  • Uranium foil target member of low enriched uranium for irradiation production fission &lt;99&gt;Mo

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A fission for irradiation production 99 Low-enriched uranium uranium foil target of Mo, the target has a "sandwich" structure, such as Figure 7 As shown, it includes an inner target tube 15, an outer target tube 17 and a uranium foil 16; the uranium foil 16 is located between the inner target tube and the outer target tube;

[0031] The inner diameter of the inner target cylinder 15 is constant, and the outer wall is designed as a tapered structure with a taper of 1:160;

[0032] The uranium foil is wrapped on the outside of the inner target tube, the thickness of the uranium foil is 150 μm, and the inner and outer surfaces of the uranium foil are coated with a fission recoil protective layer, and the thickness of the protective layer is 15 μm;

[0033] The outer diameter of the outer target tube is constant, the inner wall is designed as a tapered structure, and the inner diameter and inner wall taper of the outer target tube are respectively adapted to the outer dia...

Embodiment 2

[0048] The difference from Example 1 is that the material of the inner target tube and the outer target tube is Mg, the thickness of the uranium foil is 120 μm, and the thickness of the fission recoil protection layer is 18 μm.

Embodiment 3

[0050] The difference from Example 1 is that the material of the inner target cylinder and the outer target cylinder is Zr, and the thickness of the fission recoil protection layer is 12 μm.

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Abstract

The invention belongs to the technical field of target member preparation and discloses a uranium foil target member of low enriched uranium for irradiation production fission <99>Mo. The target member is of a sandwich-type structure and comprises an inner target cylinder, an outer target cylinder and uranium foil. The uranium foil is positioned between the inner target cylinder and the outer target cylinder. The internal diameter of the inner target cylinder is unchanged, the outer wall of the inner target cylinder is designed into a tapered structure with the conicity of 1:160. The uranium foil wraps the outer side of the inner target cylinder. The thickness of the uranium foil is 120-150[mu]m, the inner and outer surfaces of the uranium foil are plated with a fission recoil protection layer respectively, and the thickness of the protection layer is 12-18[mu]m. The outer diameter of the outer target cylinder is unchanged, the inner wall of the outer target cylinder is designed into a tapered structure, and the inner diameter and the inner wall conicity of the outer target cylinder are matched with the outer diameter and the outer wall conicity of the inner target cylinder respectively. The uranium foil target member has the beneficial effects that the target unbinding and melting is simple, the radiation efficiency is high and the radioactivity pollution can be reduced.

Description

technical field [0001] The invention belongs to the technical field of target preparation, and in particular relates to a fission 99 Mo's LEU uranium foil target. Background technique [0002] 99m Tc drug is the most widely used radiodiagnostic drug in modern nuclear medicine. The nuclide is generally made of artificial radionuclide 99 Mo decays to a half-life of 66h. Production 99 There are various pathways for Mo, but the main pathway is reactor irradiation 235 U is produced by fission reaction 99 Mo and other products, of which 99 Mo accounts for 6.1% (mass percentage) of fission products. Uranium target ( 235 U) After entering the pile, a fission reaction will occur under the action of thermal neutrons, and the reaction cross section is 586b. The fission reaction equation is: [0003] 235 U+n→ 236 U+ 99 Mo+ 134 Sn+3n [0004] Large-scale production of fission using highly enriched uranium (HEU) 99 Mo is the current global 99 The main source of Mo, the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21G1/02
CPCG21G1/02
Inventor 于宁文罗志福邓新荣向学琴梁积新沈亦佳
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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