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High-flux test reactor irradiation target and method for producing 252Cf by irradiating americium

A high-flux, test reactor technology, applied in the field of high-throughput test reactor irradiation targets and irradiated americium to produce 252Cf, can solve the problems of low production method efficiency, achieve reduced self-shielding effect, good irradiation effect, The effect of high engineering practical value

Inactive Publication Date: 2021-08-24
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the prior art neutron sources use radioactive isotopes 252 The production method of Cf has the problem of inefficiency

Method used

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  • High-flux test reactor irradiation target and method for producing 252Cf by irradiating americium
  • High-flux test reactor irradiation target and method for producing 252Cf by irradiating americium
  • High-flux test reactor irradiation target and method for producing 252Cf by irradiating americium

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Embodiment 1

[0047] Such as figure 1 , figure 2 As shown, a high-throughput test reactor irradiation target of the present invention, the irradiation target is a kind of high-flux test reactor irradiation americium production 252 target of Cf;

[0048] The structure of the irradiation target adopts such as figure 1 As shown in the form of a ring-shaped rod bundle with a hollow channel, the irradiation target is sequentially composed of a tubular central channel 1, a first cladding layer 2, and a first cooling water gap layer from the inside to the outside along the radial direction of the target. 3. The second cladding layer 4, the matrix layer 5, the third cladding layer 6, the second cooling water gap layer 7 and the fourth cladding layer 8; the central channel 1 is water-through or sealed; the first cladding layer The materials of the shell layer 2 , the second shell layer 4 , the third shell layer 6 and the fourth shell layer 8 are all made of aluminum or zirconium. The material o...

Embodiment 2

[0059] Such as Figure 1 to Figure 4 As shown, the difference between this embodiment and embodiment 1 is that a high-throughput test reactor is used to irradiate americium to produce 252 The method of Cf, this method uses a kind of high-throughput test pile radiation target described in embodiment 1, such as Figure 4 As shown, the method includes the following steps:

[0060] S1: During the shutdown of the irradiation reactor, select the height of the irradiation target of one of the high-flux test reactors, and install the irradiation target directly in the middle of the irradiation reactor where the flux is higher position; among them, the rational selection of the height of the target is to avoid the two ends of the target from entering the area with low neutron flux density;

[0061] S2: adopt optimization measures to optimize the neutron energy spectrum at the installation position of the irradiation target, so that the neutrons are mainly distributed in the thermal g...

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Abstract

The invention discloses a high-flux test reactor irradiation target piece and a method for producing 252Cf by irradiating americium. The irradiation target piece is a target piece for producing 252Cf by irradiating americium in a high-flux test reactor. The structure of the irradiation target piece is a hollow annular rod bundle type structure, and the irradiation target piece sequentially comprises a tubular center hole channel, a first cladding layer, a first cooling water gap layer, a second cladding layer, a base body layer, a third cladding layer, a second cooling water gap layer and a fourth cladding layer from inside to outside in the radial direction of the target piece. According to the method, the final assembly amount of americium oxide in the target piece is reasonably selected according to the requirements of 252Cf in different irradiation periods, and the optimal 252Cf production efficiency is obtained through reasonable design of factors such as the content of americium oxide in the target piece material, the target material height, the neutron energy spectrum and the neutron fluence rate. The method is relatively high in irradiation production efficiency and has very high engineering practical value; and the blank that no 252Cf production method exists in China is filled.

Description

technical field [0001] The invention relates to the technical field of radioisotope production, in particular to high-throughput test reactor irradiation targets and the production of irradiated americium 252 Method of Cf. Background technique [0002] 252 Cf, as an artificially manufactured radionuclide, is usually used to make compact, portable, high-intensity neutron sources. It is widely used in industry, covering nuclear reactor start-up, nuclear fuel rod scanning, oil exploration, cancer treatment, materials Analysis, material flaw detection, research and other fields. [0003] At present, only the United States and Russia have commercial production in the world 252 Cf's ability to monopolize 252 Cf supply the market, the price is very expensive. On the other hand, with the Sino-US trade war and the implementation of the US "nuclear restriction order" against China, my country may face unlimited 252 Cf buyable risk. Fully grasp 252 Core technologies such as Cf ...

Claims

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Application Information

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IPC IPC(8): G21G1/02G21K5/08
CPCG21G1/02G21K5/08
Inventor 李庆姚维华谢运利蒋朱敏李满仓于颖锐王连杰魏彦琴娄磊朱勇辉吴磊王丹刘同先王帅
Owner NUCLEAR POWER INSTITUTE OF CHINA
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