Zirconium hydride moderated metal cooled reactor miniaturized design method and reactor
A design method, metal cooling technology, applied in the direction of reactors, reactor fuel elements, nuclear reaction control, etc., can solve the problems that the geometric size of the core cannot be effectively reduced, the geometric size of the core can be reduced, and the fuel enrichment degree can be reduced. Achieve the effects of reducing fuel enrichment, reducing core geometric size, and strong neutron moderation capability
Active Publication Date: 2020-02-28
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology
[0003] The purpose of the present invention is to provide a zirconium hydride moderated metal-cooled reactor miniaturization design method and reactor, reduce the fuel enrichment degree and reduce the geometric size of the core, and solve the fuel enrichment problem faced in the design of the existing small liquid metal cooled reactor Technical problems such as high density, large critical mass, and inability to effectively reduce the geometric size of the core
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Embodiment 1
[0025] Such as Figure 1 to Figure 3 As shown, a zirconium hydride moderated metal-cooled reactor miniaturization design method and the reactor, the core is composed of fuel assembly 1 and control rod assembly 2, the two are evenly arranged crosswise inside the core; The inner side of the zirconium hydride reflective layer 3 matches the shape of the fuel assembly 1 . The 108 fuel rods 5 of the fuel assembly 1 are uniformly arranged in an equilateral triangle grid, and the pellets of the fuel rods 5 are ceramic fuel enriched in uranium dioxide or uranium-plutonium mixed oxide, with a diameter of 6.5mm. The thickness of the cladding of the fuel rods 5 is 0.6mm, and the material is stainless steel; the guide tube 7 of the outer square and inner circle of the fuel assembly 1 occupies the grid positions of 19 fuel rods 5, the outer distance from the side to side is 42.0mm, and the inner diameter is 35.0mm, the diameter of the cylindrical zirconium hydride in the guide tube 7 is 33...
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The invention discloses a zirconium hydride moderated metal cooled reactor miniaturized design method and a reactor. The reactor core of the reactor is composed of fuel assemblies, control rod assemblies and a special-shaped integral zirconium hydride reflecting layer, wherein the fuel assemblies and the control rod assemblies are uniformly arranged in a crossed manner and have the same boundary dimension, the integral zirconium hydride reflecting layer is provided with a cooling pore passage and is arranged at the outermost periphery of the reactor core, the outer side is circular, and the inner side is matched with the adjacent fuel assemblies in shape; cylindrical zirconium hydride is arranged in a central instrument tube of each regular hexagonal fuel assembly, and annular zirconium hydride is arranged between an outer box and an inner tube of each control rod assembly. According to the invention, the problems of high fuel enrichment degree, large critical mass, incapability of effectively reducing the geometric dimension of the reactor core and the like in the design of the existing liquid metal cooled small reactor are solved.
Description
technical field [0001] The invention relates to the technical field of nuclear reactors, in particular to a miniaturization design method of a zirconium hydride moderated metal cooling reactor and the reactor. Background technique [0002] Liquid metal cooled reactors (such as lead-based fast reactors, etc.) have long refueling intervals, high inherent safety, can operate under normal pressure, and have good potential for nuclear waste transmutation and multiplication, and have become the main reactor type of the fourth-generation advanced nuclear energy system. . Metal-cooled reactors have a very wide range of uses, especially in the fields of small nuclear power systems and nuclear power systems, where there is a strong demand. For this reason, a variety of small metal-cooled reactor concepts have been developed, such as the American modular sodium-cooled fast reactor SMFR and the small natural circulation lead-cooled fast reactor SSTAR, and the Russian small lead-bismuth...
Claims
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Login to View More IPC IPC(8): G21C3/326G21C3/322G21C7/10
CPCG21C3/322G21C7/10G21C3/3265Y02E30/30
Inventor 夏榜样孙伟严明宇余红星柴晓明李松蔚李文杰
Owner NUCLEAR POWER INSTITUTE OF CHINA