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A supercritical water reactor fuel assembly and core

A supercritical water reactor and fuel assembly technology, applied in the direction of reactor fuel elements, moderator/core structures, reactors, etc., can solve the problem of short core life, uneven power distribution, fuel consumption of theoretical unloading of fuel assemblies Low-level problems, to achieve the effect of prolonging the life of the core, reducing the power peak factor of components, and improving safety

Active Publication Date: 2017-05-31
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.

Method used

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  • A supercritical water reactor fuel assembly and core
  • A supercritical water reactor fuel assembly and core
  • A supercritical water reactor fuel assembly and core

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Embodiment 1

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

[0034] Moderator water rods, 4 fuel rods with enrichment of 5.6%, 20 fuel rods with enrichment of 7.5%, and 32 fuel rods with enrichment of 8.26%, wherein the cross section of the fuel assembly is a rectangle In the first rectangle of the cross section of the fuel assembly, there are 56 cell positions evenly distributed in the first rectangle except for the moderator water rod, and each cell position is provided with 1 fuel rod , wherein the four 5.6% enriched fuel rods 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 with the first rectangle. The centers overlap, and each fuel rod with 5.6% enrichment is evenly distributed with 2 fuel rods wit...

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Abstract

The invention discloses a fuel assembly for a supercritical water reactor. The fuel assembly adopts a radial three-zone enrichment arrangement, and the fuel assembly includes: moderator water rods, and four fuel rods with an enrichment degree of 5.6%. , 20 fuel rods with an enrichment degree of 7.5%, and 32 fuel rods with an enrichment degree of 8.26%. Two fuel rods with 7.5% enrichment are evenly distributed on the side of the fuel rod with 5.6% enrichment, 12 fuel rods with 7.5% enrichment are evenly distributed in moderator water rods, and the remaining cells are arranged separately 1 fuel rod with 8.26% enrichment.

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 rapidly in recent years. It has outstanding advantages such as high unit thermal efficiency and system simplification. Its thermal efficiency is as high as about 44%, which 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 million kilowatt-class 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 wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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