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Supercritical water reactor fuel assembly and reactor core

A supercritical water reactor and fuel assembly technology, which is applied to the reactor fuel element, moderator/core structure, reactor, etc., can solve the problem of uneven power distribution, short core life, and theoretical unloading burnup of fuel assemblies. It can reduce the power peak factor of components, prolong the life of the core and improve the safety.

Active Publication Date: 2016-03-09
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology

[0010] The invention provides a supercritical water reactor fuel assembly and a core, which solves the problems of insufficiently uniform power distribution in the fuel assembly, low theoretical unloading fuel consumption of the fuel assembly, and short core life in the existing supercritical water reactor core design. To solve the technical problems, the technical effect of prolonging the life of the core, improving the economy of the reactor, reducing the power peak factor of the components, and improving the safety of the reactor has been achieved.

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  • Supercritical water reactor fuel assembly and reactor core
  • Supercritical water reactor fuel assembly and reactor core
  • Supercritical water reactor fuel assembly and reactor core

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Embodiment 1

[0033] In embodiment one, a supercritical water reactor fuel assembly is provided, please refer to Figure 1-Figure 8, the radial 3-zone enrichment arrangement is adopted in the fuel assembly, and the fuel assembly includes:

[0034] Moderator water rods, 4 fuel rods with a 5.6% enrichment degree, 20 fuel rods with a 7.5% enrichment degree, and 32 fuel rods with an 8.26% enrichment degree, wherein the cross-section of the fuel assembly is rectangular In the first rectangle of the cross section of the fuel assembly, there are 56 cell positions evenly distributed in the area of ​​the first rectangle except the moderator water rods, each cell position is provided with 1 fuel rod , wherein, the four fuel rods with 5.6% enrichment degree are respectively distributed at the cell positions of the four corner points of the first rectangle, and the center of the moderator water rod is connected to the first rectangle The center coincides, and there are 2 fuel rods with 7.5% enrichment...

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Abstract

The invention discloses a supercritical water reactor fuel assembly. Radial three-region enrichment degree arrangement is adopted inside the fuel assembly. The fuel assembly comprises a moderator water rod, four fuel rods of the enrichment degree being 5.6%, 20 fuel rods of the enrichment degree being 7.5% and 32 fuel rods of the enrichment degree being 8.26%. The four fuel rods of the enrichment degree being 5.6% are distributed at lattice cell positions of four angular points respectively. Two fuel rods of the enrichment degree being 7.5% are distributed on the side face of each fuel rod of the enrichment degree being 5.6%. 12 fuel rods of the enrichment degree being 7.5% are evenly distributed on the moderator water rod, and the other lattice cell positions are each provided with one fuel rod of the enrichment degree being 8.26%.

Description

technical field [0001] The invention relates to the technical field of nuclear reactor design, in particular to a supercritical water reactor fuel assembly and a core. Background technique [0002] Supercritical water-cooled reactor (SCWR) is a fourth-generation nuclear energy system that has developed relatively rapidly in recent years. It has outstanding advantages such as high unit thermal efficiency and simplified system. Its thermal efficiency is as high as about 44%, and it has great advantages over other reactors in terms of economy. [0003] Background Document 1 ("Preliminary Conceptual Design of Supercritical Water-Cooled Reactor CSR1000 Core", Nuclear Power Engineering, 2013, 34(1):9-14) proposed the design concept of a mega-kilowatt supercritical water reactor with China's independent intellectual property rights CSR1000, supercritical water reactor CSR1000 adopts a single water rod and a combined square fuel assembly, which simplifies the assembly structure whi...

Claims

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Application Information

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IPC IPC(8): G21C3/328G21C5/12
CPCG21C3/328G21C5/12Y02E30/30
Inventor 王连杰卢迪赵文博陈炳德姚栋夏榜样于颖锐李庆
Owner NUCLEAR POWER INSTITUTE OF CHINA
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