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Method for determining Monte Carlo equivalent model of boron-coated neutron detector

A neutron detector and equivalent model technology, which is applied in the field of valid model determination to achieve the effects of high computing accuracy, accurate counting, and reduced computing resource requirements

Pending Publication Date: 2020-12-29
CHINA NUCLEAR POWER ENG CO LTD
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There is no relevant technical disclosure about the equivalent Monte Carlo calculation model method of boron-coated neutron detectors

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  • Method for determining Monte Carlo equivalent model of boron-coated neutron detector
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  • Method for determining Monte Carlo equivalent model of boron-coated neutron detector

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Embodiment Construction

[0031] 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.

[0032] To realize the technical solution in the present invention, the following two conditions and capabilities are required:

[0033] 1) Conditions and capabilities for carrying out the experimental measurement of the absolute detection efficiency of boron-coated neutron detectors

[0034] Have an Am-Li source or 252 Cf source or other neutron sources, a series of moderators, such as polyethylene with different thicknesses, boron-coated neutron detectors and accessories required for data acquisition, as well as sufficient professional knowledge and hands-on ability, can complete the measurement ...

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Abstract

The invention relates to a method for determining a Monte Carlo equivalent model of a boron-coated neutron detector. The method is suitable for Monte Carlo simulation calculation analysis of the boron-coated straw tube neutron detector. The method is based on a Monte Carlo program, a <3>He or BF3 neutron detector model is used for equivalently coating a boron neutron detector, meanwhile, a neutronsource is used for actually measuring the detection efficiency of the boron neutron detector under a series of moderation conditions, and the detection efficiency under different moderation and neutron energy spectrum conditions is met by adjusting parameters of the <3>He or BF3 detector. Therefore, a Monte Carlo equivalent model and calculation parameters of the boron-coated neutron detector under the specific neutron energy spectrum condition are obtained. The method is a simple and feasible method, and the equivalent <3>He or BF3 detector Monte Carlo model can be determined for the boron-coated neutron detector without knowing the detailed internal structure of the boron-coated neutron detector, Monte Carlo simulation from fineness to micron order and subsequent electric field simulation calculation.

Description

technical field [0001] The invention belongs to the technical field of neutron detector design, and in particular relates to a method for determining a Monte Carlo equivalent model of a boron-coated neutron detector. Background technique [0002] Neutron detection is a fundamental need in the field of nuclear energy. 3 He and 10 B is a good thermal neutron absorbing material because of its large thermal neutron reaction cross section, and is widely used in the field of thermal neutron detection. currently 3 When the supply of He gas is in short supply, boron-coated straw tube neutron detectors are expected to replace 3 A new neutron detector based on a He proportional counter. Boron-coated straw tube is a thin-walled straw tube substrate coated with boron carbide (B 4 C) The cylindrical proportional counter of the material is generally designed as a boron-coated straw tube array in order to improve the detection efficiency. [0003] To establish a computational model o...

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Application Information

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IPC IPC(8): G06F30/25G01T3/00G01T7/00G06F119/20
CPCG06F30/25G01T3/00G01T7/005G06F2119/20Y02E30/30
Inventor 杨海峰陈添邵增霍小东于淼易璇袁媛胡小利张浩然李云龙
Owner CHINA NUCLEAR POWER ENG CO LTD
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