Wide-energy-spectrum neutron fluence online monitoring system

A monitoring system and neutron technology, applied in the field of radiation detection, can solve the problems of bulky and bulky long neutron counters, and achieve the effect of improving accuracy

Active Publication Date: 2021-06-04
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
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Problems solved by technology

[0004]The object of the present invention is to provide a wide-spectrum neutron fluence on-line monitoring system, which overcomes the bulky problem o

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  • Wide-energy-spectrum neutron fluence online monitoring system
  • Wide-energy-spectrum neutron fluence online monitoring system
  • Wide-energy-spectrum neutron fluence online monitoring system

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Embodiment Construction

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] see figure 1 and figure 2 , a wide-spectrum neutron fluence online monitoring system of the present invention mainly includes: a cylindrical polyethylene moderator, a fast neutron detector is placed at the axial front end of the polyethylene moderator, and A thermal neutron detector is placed inside the body along the axial direction, and the present invention expands the low-energy region of the neutron fluence monitoring system by using ...

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Abstract

The invention relates to a wide-energy-spectrum neutron fluence on-line monitoring system. The wide-energy-spectrum neutron fluence on-line monitoring system comprises a neutron probe, a signal acquisition device and a data processing device, wherein the neutron probe comprises a cylindrical moderator, a thermal neutron detector, a fast neutron detector and a shielding layer, and can obtain relatively flat neutron fluence response in an energy range of 1 eV to 20 MeV; the signal acquisition and processing part can realize setting of parameters such as high voltage and magnification times of the detector and real-time online display of neutron fluence. The system can remarkably solve the defect that an existing long neutron counter is heavy in size and has the advantages of being light, portable, high in gamma-ray and X-ray resisting capacity and the like, so that the system can be applied to neutron fluence monitoring of strong neutron radiation fields such as accelerators, fission reactors and fusion test devices.

Description

technical field [0001] The invention belongs to the field of radiation detection, and relates to an on-line neutron fluence measuring device in the fields of nuclear engineering and radiation protection. Background technique [0002] In nuclear facilities such as nuclear reactors and accelerators, neutron fluence monitoring is one of the necessary means to study nuclear devices and physical experiments, such as: nuclear reactor core power monitoring and core design parameter verification, nuclide neutron nuclear reaction cross section measurement , and the measurement of standard neutron radiation field parameters, etc. At present, the more commonly used neutron fluence monitoring methods include activation method, long neutron counter, multisphere spectrometer, recoil proton detector, fission ionization chamber and scintillator detector, etc. Among them, the long neutron counter has been used as a standard instrument for neutron fluence measurement in the world due to its ...

Claims

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Application Information

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IPC IPC(8): G01T3/02G01T3/04G01T3/00
CPCG01T3/02G01T3/04G01T3/001Y02E30/30
Inventor 洪兵胡立群钟国强李凯
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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