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Pressurized light water type neutron source assembly

A technology of aggregates and neutron sources, applied in the direction of neutron sources, reducing greenhouse gases, reactor fuel elements, etc., can solve the problems of limited neutron uniform emission, delay, and shortened reactor start-up time, so as to improve process efficiency and The effect of improving stability and starting efficiency

Inactive Publication Date: 2015-09-16
KOREA NUCLEAR TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] The neutron source assembly, the primary source 2 is provided in the form of a small target pellet, and the fuel rods of the common nuclear reactor core will have a length of about 4m, and for an effective chain nuclear reaction, it is necessary to distribute the neutrons evenly to the fuel rods at the beginning of the chain nuclear reaction, but according to the described technology, it is limited to achieve uniform emission of neutrons, due to the non-uniform emission of neutrons, as the capacity of the pressurized light water reactor increases, the stable chain type nuclear reaction will also be delayed, while creating an obstacle to shortening the start-up time of the reactor

Method used

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  • Pressurized light water type neutron source assembly
  • Pressurized light water type neutron source assembly
  • Pressurized light water type neutron source assembly

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Embodiment Construction

[0036] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0037] Generally, the nuclear nuclear reactor core of the APR1400 pressurized light water reactor is composed of 241 nuclear fuel assemblies, 93 control rod assemblies and 2 neutron source assemblies. The nuclear fuel assemblies each have 236 fuel rods and are arranged on the periphery In the nuclear fuel assembly, the neutron source assembly is installed at mutually symmetrical positions.

[0038] figure 2 It is a front view showing the appearance of the pressurized light water type neutron source assembly of the present invention, image 3 It is a sectional view showing the pressurized light water type neutron source assembly of the present invention. refer to the figure 2 with image 3 , the neutron source assembly of the present invention is characterized in that the assembly consists of an upper pipe member 10 that is inserted into a...

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Abstract

The invention relates to a pressurized light water type neutron source assembly, concretely a pressurized light water type neutron source assembly of a plurality of primary sources and secondary sources mutually arranged, which is required by starting the nuclear reactor core of an APR1400 pressurized light water reactor of a South Korea standard nuclear power plant model. The pressurized light water type neutron source assembly is characterized by comprising an upper pipe fitting inserting to the upper portion of the nuclear fuel assembly guide pipe of a pressurized light water reactor; a lower pipe fitting inserting to the lower portion of the nuclear fuel assembly guide pipe of a pressurized light water reactor, and composed of a pipe in connection with the lower end portion of the upper pipe fitting, and an end cover sealing the lower end portion of a pipe; and a neutron source unit comprising a plurality of primary sources and secondary sources mutually in series connection in the pipe, wherein neutron source units are mutually arranged under the condition of configuring the secondary sources among the primary sources.

Description

technical field [0001] The present invention relates to a pressurized light water type neutron source assembly, and in more detail, relates to a plurality of primary sources and secondary sources required for starting a nuclear reactor core of a model APR1400 pressurized light water reactor of a Korean standard nuclear power plant. A collection of pressurized light water neutron sources arranged alternately. Background technique [0002] In order to start a nuclear power plant, it is necessary to carry out a chain nuclear reaction in the core of the nuclear reactor. For this reason, the neutron source is installed in the core of the nuclear reactor in the form of an assembly. In order to start the nuclear reactor core, the neutron source assembly includes a primary source and a secondary source, wherein the primary source will be used during the initial test operation of the nuclear reactor core, and the secondary source will be used during the normal operation after the tes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21G4/02
CPCG21G4/02Y02E30/30G21C3/324
Inventor 李判权高秉铃姜熙永林贤泽朴根满
Owner KOREA NUCLEAR TECH
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