Fast neutron and thermal neutron concentric circle type partition ultrahigh-flux reactor core

A technology of thermal neutrons and fast neutrons, applied in the field of ultra-high-flux reactor cores, can solve the problem of low thermal neutron flux

Pending Publication Date: 2022-05-13
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Both VTR and MBIR are fast reactors, and their thermal neutron flux is very low. Therefore, these two reactors are mainly used for fast neutron applications, such as material irradiation, which are difficult to use in isotope production.

Method used

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  • Fast neutron and thermal neutron concentric circle type partition ultrahigh-flux reactor core
  • Fast neutron and thermal neutron concentric circle type partition ultrahigh-flux reactor core
  • Fast neutron and thermal neutron concentric circle type partition ultrahigh-flux reactor core

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Embodiment 1

[0045] This embodiment provides a fast neutron thermal neutron concentric zoned ultra-high flux reactor core, such as figure 1 As shown, the core of this embodiment includes several fuel assemblies 8 , several control rod assemblies 9 , a central tunnel assembly 10 , reflective layers and shielding layers 14 .

[0046] In this embodiment, the interior of the reflective layer is adjacent to the active area of ​​the core, and the reflective layer is concentrically divided into three regions: fast neutron region 11 , isolation region 12 , and thermal neutron region 13 from inside to outside. The outer diameter of the reflective layer in this embodiment is not less than 2500mm. The reflective layer in this embodiment occupies a larger area, which can reduce core leakage.

[0047] Holes of different shapes can be arranged in the fast neutron zone 11 of this embodiment for material irradiation, etc.; the thermal neutron zone 13 can be designed with corresponding holes according to ...

Embodiment 2

[0059] In this embodiment, the core proposed in the above-mentioned embodiment 1 is compared with the existing core. The core proposed in the above-mentioned embodiment 1 used in this embodiment consists of 52 fuel assemblies, 8 control rod assemblies and 1 central tunnel assembly constitute. In the fuel assembly, the thickness of the fuel core is 0.9 mm, the thickness of the cladding is 0.30 mm, and 19 fuel plates are included in the assembly. The fuel core material is U-10Zr alloy, the cladding material is stainless steel, and the distance between the components is 83.70mm. The core coolant is lead-bismuth alloy. The material of the fast neutron zone is coolant, the material of the isolation zone is stainless steel, and the material of the thermal neutron zone is zirconium hydride. The thickness of the fast neutron region of the reflective layer is 300mm, the thickness of the isolation layer is 20mm, and the thickness of the thermal neutron region is 150mm. The reflective...

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Abstract

The invention discloses a fast neutron and thermal neutron concentric circle type partitioned ultrahigh-flux reactor core, which comprises a reflecting layer arranged on the periphery of an active region, and the reflecting layer is divided into three concentric circle type regions: a fast neutron region, an isolation region and a thermal neutron region from inside to outside in sequence. The reactor core provided by the invention has the fast neutron zone with larger area and higher fast neutron flux, and also has the thermal neutron zone with larger area and higher thermal neutron flux, so that the application of the ultrahigh-flux reactor can be enhanced, and irradiation of multiple materials, production of multiple isotopes and the like can be simultaneously carried out.

Description

technical field [0001] The invention belongs to the technical field of nuclear reactor cores, and in particular relates to an ultra-high-flux reactor core with fast neutron thermal neutron concentric circular partitions. Background technique [0002] The development of nuclear power engineering is inseparable from nuclear reactors, and the development of nuclear reactors is inseparable from test reactors. The test reactor plays a very important role in the development of various reactor types. The development trend of modern test reactors is to have high thermal neutron or fast neutron flux. These high neutron flux test reactors can greatly promote the development of nuclear energy basic science. In addition, in the test reactor, the high thermal neutron flux reactor has strong practical value, including the irradiation production of radioisotopes and transuranic elements, so it is an important goal pursued by the advanced research test reactor design. On the other hand, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C1/02G21C11/06
CPCG21C1/02G21C1/022G21C11/06Y02E30/30
Inventor 王连杰蔡云汪量子夏榜样余红星娄磊张斌张策谢运利吉文浩
Owner NUCLEAR POWER INSTITUTE OF CHINA
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