Fusion drive subcritical system and method for producing 252Cf neutron source

A subcritical system, neutron source technology, applied in the field of nuclear energy, can solve problems such as large and high-level radioactive waste, and achieve the effect of ensuring safety

Inactive Publication Date: 2009-03-04
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The reactor is capable of producing 252 Cf capability, but fission reactors themselves generate large amounts of high-level waste

Method used

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  • Fusion drive subcritical system and method for producing 252Cf neutron source
  • Fusion drive subcritical system and method for producing 252Cf neutron source
  • Fusion drive subcritical system and method for producing 252Cf neutron source

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Embodiment Construction

[0026] This accompanying drawing is a cross-sectional view of a spherical structure. The structural shape of the actual device can be cylindrical, spherical and annular or their approximate shapes, mainly depending on the type of the external neutron source generating device. Area 5 in the schematic diagram can be selected according to the situation.

[0027] The first area is the D-T fusion neutron source area, and the neutron source is produced by D-T fusion.

[0028] The second zone is the actinide nuclide processing area, including long-lived actinide nuclides from nuclear power plant spent fuel, fissile fuel plutonium-239 mixture and cladding structural materials, which are placed in coolant.

[0029] The third area is the target area, where americium 241, curium 244 elements and cladding structural materials are placed in the coolant.

[0030] The fourth area is the fissile fuel breeding area, where natural uranium or depleted uranium and cladding structural materials ...

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Abstract

The invention discloses a method and a system for producing a <252>Cf neutron source by a fusion-driven sub-critical system, the external neutron source is: D-T fusion neutron source; a fuel cycle mode is a U-Pu cycle mode, and the fusion-driven sub-critical system of the U-Pu cycle mode has higher neutron flux. The structure of a cladding layer is as follows: an actinide nuclide treatment area, a target area, a fissile fuel proliferation area or the fissile fuel proliferation area, a fission product treatment area and a reflection and shielding area are sequentially surrounded at the outside of a generation area of the external neutron source, and the various areas are separated by using structural materials. The target area adopts helium as a cooling agent, reaction substances of the target area are formed by stacking in small sphere shape, and the volume of total solids accounts for 60 percent to 90 percent of the total volume. A target ball is taken out after materials of the target area are continuously radiated for about one year in the fusion-driven sub-critical system; the <252>Cf has short half-life and can not be radiated for a long time.

Description

technical field [0001] The invention belongs to the technical field of nuclear energy and is a production 252 Systems and methods for Cf neutron sources. Background technique [0002] In the 1950s, American scientists first discovered 252 CF element. 252 Cf belongs to the actinide nuclides and is the tenth element of the actinide nuclides in the periodic table of elements. Afterwards, countries such as the United States and the Soviet Union carried out a large number of researches on 252 Cf and other super plutonium nuclide research work. 252 The research on the application of Cf element has made rapid progress, and its application range extends from nuclear industry to biomedicine, geological exploration and so on. However, worldwide 252 The output of Cf is very low, about a few grams per year. 252 Cf can release neutrons by spontaneous fission, and the neutron yield is 2.31×10 12 the s -1 .g -1 , with a half-life of 2.65 years and an average energy of 2.15MeV. 2...

Claims

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Application Information

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IPC IPC(8): G21B1/01
CPCY02E30/10
Inventor 何兆忠吴宜灿陈明亮曾勤蒋洁琼邹俊
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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