Long-Life Supercritical Carbon Dioxide Cooled Small Reactors

A carbon dioxide and supercritical technology, applied in the direction of moderator/core structure, reactor, reactor fuel element, etc., can solve the problem of reducing the stable temperature of the fuel, and achieve the effect of increasing the stable temperature, reducing complexity, and reducing difficulty

Active Publication Date: 2017-04-19
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the presence of beryllium oxide, the stable temperature of the fuel is reduced

Method used

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  • Long-Life Supercritical Carbon Dioxide Cooled Small Reactors
  • Long-Life Supercritical Carbon Dioxide Cooled Small Reactors
  • Long-Life Supercritical Carbon Dioxide Cooled Small Reactors

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Embodiment Construction

[0026] The structure of the present invention will be described in detail below in conjunction with the drawings and specific embodiments.

[0027] Such as figure 1 As shown, a kind of honeycomb fuel assembly of the present invention, this fuel assembly is hexagonal, has three layers altogether from outside to inside, is assembly wall 1 and air gap layer 2 respectively, is filled with fuel region 3 in air gap layer 2, fuel There are 91 coolant channels evenly distributed in zone 3.

[0028] Preferably, the material filled in the fuel zone 3 is MOX fuel.

[0029] Preferably the material of the inner component wall is ODS MA956 stainless steel.

[0030] Such as figure 2 As shown, the coolant passage is composed of a coolant 4, a coolant wall 5 and an air gap 6 between the coolant passage wall and the fuel.

[0031] Preferably, the material of the coolant wall 5 is ODS MA956 stainless steel.

[0032] Such as image 3 As shown, it is a long-life supercritical carbon dioxide...

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Abstract

Honeycomb fuel assembly and long-life supercritical carbon dioxide cooling small reactor, the honeycomb fuel assembly has three layers from the outside to the inside, which are respectively the component wall, the air gap layer and the fuel area filled in the air gap layer; the reactor includes a pressure vessel, The pressure vessel includes a pressure vessel and the core and control rod driving mechanism placed inside it. The upper and lower parts of the pressure vessel are separated by upper and lower partition plates to separate the upper chamber and the lower chamber respectively. Multiple honeycomb-shaped chambers are placed vertically in the core. The fuel assembly, whose coolant channel wall and assembly wall extend upwards through the upper partition and connects with the upper chamber, where the lower partition connects with the honeycomb fuel assemblies in the core, corresponding to each honeycomb fuel assembly has an air intake hole; the reactor has the characteristics of small size, high thermal efficiency, low working pressure and coolant outlet temperature, and low difficulty in engineering realization.

Description

technical field [0001] The invention belongs to the technical field of nuclear reactor engineering, in particular to a honeycomb fuel assembly and a long-life supercritical carbon dioxide cooling small reactor using the honeycomb fuel assembly. Background technique [0002] Supercritical carbon dioxide cooled reactors use supercritical carbon dioxide as a coolant. Supercritical carbon dioxide means that the pressure and temperature of carbon dioxide are higher than the pseudocritical point of carbon dioxide (7.38MPa, 30.98°C). Compared with the helium-cooled reactor of the Brayton cycle, the core outlet temperature of the supercritical carbon dioxide-cooled reactor can be reduced from 900°C required by the helium-cooled reactor to about 650°C or even lower, which greatly reduces the requirements for materials. Compared with the currently popular pressurized water reactor, the thermal efficiency is above 40%, and the economy is good. Moreover, due to the use of the Brayton ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C3/62G21C5/02
CPCG21C3/623G21C5/02Y02E30/30
Inventor 曹良志刘保林吴宏春
Owner XI AN JIAOTONG UNIV
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