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Dual cooling nuclear fuel rod with tolerance for the loss of a coolant accident

A technology for nuclear fuel rods and coolants, applied in fuel elements, reactor fuel elements, assembly of fuel elements, etc., can solve the problem that nuclear fuel rods are not sufficiently cooled

Active Publication Date: 2016-03-09
KOREA ATOMIC ENERGY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] When the above-mentioned coolant leakage accident occurs, since the formation of the coolant flow path is interrupted by the expansion deformation caused by the increase in internal pressure in the typical cylindrical nuclear fuel rod, the following problems may occur: When the emergency cooling system executes the injection for cooling the nuclear reactor The nuclear fuel rods may not have been sufficiently cooled when water

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  • Dual cooling nuclear fuel rod with tolerance for the loss of a coolant accident
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  • Dual cooling nuclear fuel rod with tolerance for the loss of a coolant accident

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Embodiment Construction

[0015] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, it is to be noted that, in giving reference numerals to elements of respective drawings, the same reference numerals refer to the same element even when the same element is shown in different drawings. Also, in description of the present invention, known configurations or functions will not be described in detail since they will not obscure the understanding of the invention.

[0016] figure 2 is a diagram showing a dual-cooled nuclear fuel rod according to an embodiment of the present invention, and shows a cross-section of the dual-cooled nuclear fuel rod.

[0017] refer to figure 2 , the dual-cooled nuclear fuel rod includes an outer cladding tube 70 and an inner cladding tube 30 . In addition, refer to figure 2 (b), the inner space 51 may be defined between the inner cladding tube 30 and the outer cladding tube 70 . Pellets...

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Abstract

Disclosed is a dual cooling nuclear fuel rod with tolerance for the loss of a coolant accident. The dual cooling nuclear fuel rod includes an external coating pipe which is in the shape of a hollow cylinder, and has a circular cross section in a longitudinal direction; and an inner coating pipe which is in the shape of a hollow cylinder, has a smaller diameter than the external coating pipe, is located in a hollow part of the external coating pipe, prevents plastic deformation in a normal condition, has a thickness for generating elastic buckling before generating ballooning deformation in the external coating pipe in the event of a coolant loss accident.

Description

technical field [0001] The present invention relates to a dual-cooled nuclear fuel rod resistant to loss-of-coolant, and more particularly, the present invention relates to a dual-cooled nuclear fuel rod by adjusting the thickness of the inner cladding tube of the dual-cooled nuclear fuel rod. Dual-cooled nuclear fuel rods that withstand ballooning failure in the event of a coolant leak accident. Background technique [0002] Nuclear safety means protecting individuals, the public and the environment from radiation generated from nuclear facilities and is an area of ​​nuclear engineering that is absolutely necessary for the peaceful use of nuclear energy. Nuclear power generation has been an important source of energy in major industrialized countries for more than half a century, and there are now approximately 400 nuclear power plants in operation around the world. Also in South Korea, since 1978, nuclear power generation has continued to rise along with economic developm...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C3/06
CPCY02E30/30C22C16/00G21C3/18G21C3/32G21C3/324
Inventor 金亨奎金铉佶梁宰豪金健湜金宰勇李康禧李荣镐尹庆镐姜兴硕丘阳铉宋根禹
Owner KOREA ATOMIC ENERGY RES INST