Self-expandable sealing target and manufacturing method thereof
A manufacturing method and self-expansion technology, which are applied to electrical components, targets for generating nuclear reactions, accelerators, etc., can solve the problems of large reserved holes and difficult sealing of the target, and achieve the advantages of sealing, simple structure, The effect of reducing heat conduction
Inactive Publication Date: 2012-06-27
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology
This method of reserving small holes is only suitable for the sealing of gas target cores. For most solid target cores, due to the large size of the target core, the target core must be installed first and then welded when the target is made, resulting in The reserved hole of the target is relatively large, and it is difficult to achieve sealing by the above-mentioned cold welding method for small holes
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[0050] In the artificial transmutation experiment of iodine irradiated by neutron CuI target, it is required to analyze the gas product xenon after transmutation, so the target needs to be sealed. At the same time, the melting point of CuI is 605°C, so it is not suitable for soldering. The method of the present invention is used for target preparation as follows.
[0051] First, select the metal material. Among commonly used metal materials, aluminum has the largest expansion coefficient of 0.0000236 / °C, and the interaction between neutrons and aluminum will not produce long-lived substances, which is convenient for timely cooling and measurement. Another advantage is that aluminum has a small density and can be packaged. The quality is small. Therefore, aluminum is selected as the material of the metal target shell and the metal plug 1 . For the convenience of machining, it is more appropriate to choose 6061 aluminum with certain mechanical strength.
[0052] Second, size...
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Abstract
The invention discloses a self-expandable sealing target and a manufacturing method thereof. The target is manufactured by adopting a metal plug and a metal target shell; the metal plug is shrunk at a low temperature and then is hotly expanded at a normal-temperature environment, so as to realize the self-expandable sealing of the target. According to the method provided by the invention, a carbon-hydrogen material adhesive is prevented from being used and a target core is prevented from bearing a high temperature in the process of manufacturing the target, and the target can bear the high temperature generated in an irradiation process, so that the method is applicable to the manufacture of sealing targets with solid-state and liquid-state target cores.
Description
technical field [0001] The present invention relates to a packaging device and a manufacturing method of a ray irradiation target in the application field of nuclear technology, in particular to a packaging device and its manufacturing which require sealing of the irradiated object, no high temperature during the sealing process, and no generation of other gases during the post-irradiation analysis process method. Background technique [0002] 129 I is one of the components of ultra-long-lived nuclides in nuclear waste. Artificial neutron transmutation technology can convert it into stable nuclides to achieve the purpose of decontamination. Put iodine-129 in a neutron environment, make it react with neutrons (n, γ) to generate short-lived (half-life 12.5h) iodine-130, and iodine-130 decays into stable Xe-130 in a short time . In consideration of safety, cost and equivalence, many countries have used natural iodine-127 instead of iodine-129 to explore relevant conditions i...
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IPC IPC(8): H05H6/00
Inventor 李雪松欧阳晓平潘孝兵屠荆张文首
Owner NORTHWEST INST OF NUCLEAR TECH