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<99>Mo subcritical production device and method based on Th-U self-sustaining cycle

A production device and subcritical technology, applied in the field of 99Mo subcritical production device based on Th-U self-sustaining cycle, can solve the problems of high cost, low output, complicated production process, etc., and achieve low cost, efficient and stable production, and convenient use Effect

Pending Publication Date: 2021-07-27
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still some deficiencies in the prior art, for example, the production process is complicated, the cost is high, 99 Low yield of Mo

Method used

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  • &lt;99&gt;Mo subcritical production device and method based on Th-U self-sustaining cycle
  • &lt;99&gt;Mo subcritical production device and method based on Th-U self-sustaining cycle

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Effect test

Embodiment 1

[0038] like Figure 1~2 As shown, a Th-U self-sustaining cycle-based 99 Mo subcritical production device, including accelerator system 1, 99 Mo production system 2 and separation and purification unit 3.

[0039] The accelerator system 1 is used for accelerating, transporting ion beams, and generating neutrons.

[0040] 99 Mo production system 2 is connected with accelerator system S1 for introducing neutron flow, through 233 U(n,f) 99 Mo reaction production 99 Mo, 99 Mo fission yield is about 5.13%; meanwhile, 232 Th captures neutrons and undergoes a series of decay multiplication to obtain 233 U, newly generated 233 U fully replenishes the consumed 233 U fuel, to achieve Th-U self-sustaining cycle.

[0041] Separation and purification unit 3 and 99 Mo production system 2 is connected for drawing out the solution after the reaction and carrying out 99 The separation and purification of Mo is refluxed after pH adjustment 99 Mo Production System 2.

[0042] Speci...

Embodiment 2

[0047] A kind of based on Th-U self-sustaining cycle of the present embodiment 99 Mo subcritical production method, adopt embodiment 1 device; Described production method comprises the steps:

[0048] (1) The ion source 11 is a deuterium ion beam, and the target 15 is a gaseous tritium target in the target chamber 14, which emits 14.1 MeV neutrons through deuterium-tritium fusion reaction. Specifically, the deuterium ion beam collimated by the collimator 12 and accelerated by the accelerator 13 bombards the gaseous target-tritium target, and D-T fusion reaction occurs to emit source neutrons; the size of the gaseous tritium target is ( h=80cm), the target cavity 14 is made of stainless steel with a thickness of 0.2cm.

[0049] (2) Neutrons enter the neutron multiplication layer 21, which is made of beryllium. After neutrons have undergone multiple (n, 2n) reactions, the energy drops to the doubling threshold, and at the same time, part of the neutrons are slowed down to the...

Embodiment 3

[0056] A kind of based on Th-U self-sustaining cycle of the present embodiment 99 Mo subcritical production method, adopt embodiment 1 device; Described production method comprises the steps:

[0057] (1) The ion source 11 is a proton beam with a beam intensity of 100 μA, and the target 13 is a tungsten heavy nuclear target, which emits neutrons through heavy nuclear fission reactions. Specifically, after being collimated by the collimator 12, the proton beam accelerated by the 20MeV linear accelerator 13 followed by the 500MeV fast-cycle synchrotron 13 bombards the solid-state target-tungsten target, and a heavy nuclear fission (p, xn) reaction occurs to emit source neutrons ( Contains 15% fast neutrons and 1% ultrafast neutrons); the dimensions of the solid tungsten target are 5 cm in diameter and 10 cm in height.

[0058] (2) The neutrons generated by the accelerator system 1 enter the neutron multiplication layer 21, which is made of beryllium. After multiple (n, 2n) rea...

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Abstract

The invention provides a <99>Mo subcritical production device based on a Th-U self-sustaining cycle. The <99>Mo subcritical production device comprises an accelerator system, a <99>Mo production system and a separation and purification unit; the accelerator system is used for accelerating and transporting ion beams and generating neutrons; the <99>Mo production system sequentially comprises a neutron multiplication layer, a <232>Th-<233>U salt solution, a neutron reflection layer and a shielding layer from inside to outside; the neutron multiplication layer is used for generating high neutron flux; the <232>Th-< 233>U salt solution is used for <233>U(n, f)<99>Mo reaction to produce < 99>Mo, and meanwhile, neutrons react with <232>Th to be converted into <233>U, so that the self-sustaining cycle of the <232>Th-<233>U is achieved; and the separation and purification unit is used for separation and purification of <99>Mo. The invention further provides a <99>Mo subcritical production method. The device and the method are simple in structure and process, low in cost and high in <99> Mo yield, the Th-U self-sustaining cycle is met, and no extra fuel needs to be added within 15 years.

Description

technical field [0001] The invention relates to the technical field of isotope production, in particular to a Th-U self-sustaining cycle-based 99 Mo subcritical production device and method. Background technique [0002] 99m Tc is 99 The natural decay nucleus of Mo is currently the most widely used radioactive isotope in nuclear medicine clinically. There are 30 million to 40 million nuclear medicine imaging diagnoses worldwide every year. 99m Tc-labeled drugs account for more than 70% of clinical imaging drugs in single photon emission computed tomography (SPECT). Currently, 99 Mo is mainly irradiated by the reactor 235 U target fission preparation. Global 99 The supply of Mo is mainly produced and supplied by experimental reactors such as the NRU experimental reactor in Canada, the HFR high-flux reactor in the Netherlands, the BR-2 reactor in Belgium, the Maria reactor in Poland, and the LWR-15 reactor in the Czech Republic. However, most of the experimental reacto...

Claims

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Application Information

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IPC IPC(8): G21G1/06G21G1/08
CPCG21G1/06G21G1/08
Inventor 韩运成任雷陈思泽李桃生郁杰
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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