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Nuclear fuel rod, nuclear fuel component and nuclear reactor core

A technology for nuclear fuel rods and fuel rods is applied in the fields of nuclear fuel assemblies, nuclear reactor cores, and nuclear fuel rods, which can solve the problems of limited operating performance of the core and achieve the effect of improving operating performance.

Active Publication Date: 2009-11-04
CHINA NUCLEAR POWER TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a nuclear fuel rod, aiming to solve the problem that the nuclear fuel rods in the prior art contain only one type of fuel pellets, which leads to the limitation of core operation performance

Method used

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  • Nuclear fuel rod, nuclear fuel component and nuclear reactor core
  • Nuclear fuel rod, nuclear fuel component and nuclear reactor core
  • Nuclear fuel rod, nuclear fuel component and nuclear reactor core

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Embodiment Construction

[0013] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0014] The nuclear fuel rod provided by the embodiment of the present invention contains uranium dioxide fuel pellets and gadolinium burnable poison fuel pellets in the axial direction, which improves the operating performance of the reactor core.

[0015] Taking the tens of millions of pressurized water reactor nuclear power plants as an example, the reactor core fuel is composed of 157 groups of 17×17 fuel assemblies, each group of fuel assemblies is composed of 264 fuel rods, and each fuel rod contains 272 fuel rods. pellets. The nuclear fuel rod provided by the embodiment of the present invent...

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Abstract

The invention is applicable to the field of nuclear station fuel components and nuclear reactor cores, and provides a nuclear fuel rod, a nuclear fuel component and a nuclear reactor core. The nuclear fuel rod comprises two fuel pellets of different types in the axial direction thereof, i.e. a uranium dioxide fuel pellet and a gadolinium burnable poison fuel pellet; the nuclear fuel rod provided by the invention uses a type of fuel pellet as the main body, and the other type of fuel pellet is positioned at one end or two ends of the main fuel rod; the axial power error is improved, and the fuel utilization economy is improved, or the circulation length of the reactor core is prolonged through changing the neutron flux of the top end or the bottom end of the reactor core, so that the running performance of the reactor core is improved.

Description

technical field [0001] The invention belongs to the field of nuclear power plant fuel assembly and nuclear reactor core, in particular to a nuclear fuel rod, nuclear fuel assembly and nuclear reactor core. Background technique [0002] figure 1 A schematic diagram of the structure of nuclear fuel rods provided in the prior art is shown. Nuclear fuel rods are generally classified into two types: uranium dioxide (UO2) fuel rods and fuel rods containing gadolinium burnable poison (Gd2O3). Among them, the uranium dioxide fuel rod is composed of uranium dioxide fuel pellets; the fuel rod containing gadolinium burnable poison is composed of gadolinium burnable poison fuel pellets, and the gadolinium burnable poison fuel pellet is composed of uranium dioxide (UO2) and gadolinium Combustible poison (Gd2O3) mixed. [0003] Based on the above, it can be seen that the nuclear fuel rods in the prior art only contain one type of fuel pellets, that is, the same fuel rod contains only ur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C3/58G21C3/02
CPCY02E30/38Y02E30/30
Inventor 肖岷李雷厉井钢张洪周洲
Owner CHINA NUCLEAR POWER TECH RES INST CO LTD
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