Nuclear reactor long-life neutron source device and using method

A technology for nuclear reactor and neutron source, applied in the field of nuclear reactor fuel and reactor neutron source, can solve the problems of increased Cf international procurement cost, increased engineering cost of nuclear power plant, lack of production conditions, etc. easy-to-create effects

Pending Publication Date: 2021-05-04
SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
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Problems solved by technology

[0005] 1) 252 The half-life of Cf is about 2.635 years, and generally it can only be used for the start-up of one unit;
[0006] 2) 252 Cf production relies on ultra-high-flux reactors, and domestic production conditions are not available;
[0007] 3) 252 Cf international procurement costs continue to increase, leading to an increas

Method used

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  • Nuclear reactor long-life neutron source device and using method
  • Nuclear reactor long-life neutron source device and using method

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Embodiment Construction

[0023] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] The invention provides a method for reusing a long-life neutron source in a nuclear power plant, including a long-life neutron source, a neutron source assembly connected with a reactor control rod drive mechanism, and a neutron source in a nuclear power plant reactor in the mode of operation.

[0025] As a preferred embodiment of the present invention, the neutron-emitting material of the long-life neutron source can be selected from an americium beryllium source or a plutonium beryllium source, respectively through 241 Am and 238 α-particle bombardment produced during the α-decay of Pu 9 Be emits neutrons. In the absence of external radiation, 241 Am and 238 The two nuclides of Pu mainly disappear through α decay, an...

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Abstract

The invention discloses a nuclear reactor long-life neutron source device and a using method, the device comprises a neutron source assembly capable of installing a long-life neutron source in a sealing mode, and the neutron source assembly is connected with a reactor control rod driving mechanism. The neutron source assembly is inserted into or pulled out of a reactor core through the reactor control rod driving mechanism; the long-life neutron source can be an americium-beryllium source or a plutonium-beryllium source. According to the invention, the consumption of the neutron source material during the operation of the reactor can be obviously reduced, and the long-life characteristic of the neutron source material is maintained, so that the neutron source material can be repeatedly used in one or more units, and the uncertainty of the project cost and project progress of primary neutron source material purchase of each newly built nuclear power plant unit in China is avoided.

Description

technical field [0001] The invention belongs to the technical field of nuclear reactor fuel, in particular to the technical field of reactor neutron sources. Background technique [0002] There are two start-up methods for PWR nuclear power plants in operation and under construction in China, with external neutron source and without external neutron source. The pressurized water reactor nuclear power plants designed by China, the United States or France are all designed to start with an external neutron source. [0003] For reactor designs with external neutron sources, the role of the neutron source is to provide a basic neutron count level during the process of reactor charging to criticality, so as to ensure the normal operation of the source-range detectors and to respond to the core breeding neutrons, to overcome The blind area of ​​the source range detector ensures that the reactor has sufficient neutron count rate in the subcritical state for critical safety supervis...

Claims

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Application Information

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IPC IPC(8): G21G4/02
CPCG21G4/02
Inventor 杨庆湘郭建杨波汤春桃王梦琪毕光文王丽华黎辉秦玉龙丁谦学
Owner SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
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