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Device and method for passive nuclear level measurement

A level measurement, passive nuclear technology, applied in the field of nuclear level detection, can solve the problems of poor measurement result stability, measurement personnel and environmental hazards, and achieve the effects of improving stability, increasing the number of pulses, and increasing the receiving area.

Active Publication Date: 2018-10-09
TECHN PHYSICS INST HEILONGJIANG ACADOF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problem that the radionuclides contained in the existing nuclear level detectors include radiation sources, and the radiation sources are likely to cause harm to the measurement personnel and the environment during measurement, and the problem of poor stability of the measurement results is now provided. Level measuring device and method

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  • Device and method for passive nuclear level measurement
  • Device and method for passive nuclear level measurement
  • Device and method for passive nuclear level measurement

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specific Embodiment approach 1

[0034] Specific implementation mode one: refer to Figure 1 to Figure 5 Specifically illustrate the present embodiment, the passive nuclear level measuring device described in the present embodiment, it comprises: gamma radiation detector 8, power supply 20, signal processor and data processing module;

[0035] The gamma radiation detector 8 includes: a detector connection cover 7, a detector shell 9, a lead sheath rubber pad 10, a lead sheath 11, a photomultiplier tube 12, a stainless steel sheath 13, a scintillation crystal 14, and a fastening pad 15 , protective lead skin 16, detector bottom cover 17 and sub-pressure follower 25;

[0036] Signal processor includes: amplifier shaper, threshold discriminator and pulse analyzer;

[0037] The lead skin sheath 11 comprises a lead skin part, a plastic part and a plastic part two, the lead skin part and the plastic part are enclosed in a cylindrical shape, and the circumferential ratio of the lead skin part to the plastic part is...

specific Embodiment approach 2

[0046] Embodiment 2: This embodiment is a further description of the passive nuclear level measuring device described in Embodiment 1. In this embodiment, the scintillation crystal 14 is a plastic crystal or a sodium iodide crystal.

[0047] In this embodiment, plastic crystals or sodium iodide crystals are used to save costs.

specific Embodiment approach 3

[0048] Embodiment 3: This embodiment is a further description of the passive nuclear level measurement device described in Embodiment 1. In this embodiment, it also includes: a display unit, an input unit, and an output unit;

[0049] The display signal input end of the display unit is connected to the display signal output end of the data processing module, and the display unit is a liquid crystal display screen 18,

[0050] The parameter setting signal output end of the input unit is connected to the parameter setting signal input end of the data processing module,

[0051] The switch signal input terminal of the output unit is connected to the switch signal output terminal of the data processing module.

[0052] In this embodiment, the output unit includes: an output circuit and a relay, and the processing result of the data processing module is connected to the output unit by the switch signal output end; the input unit is composed of keys, which mainly realize parameter m...

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Abstract

The invention discloses a passive nuclear material level measurement device and method, and belongs to the field of nuclear material level detection. The passive nuclear material level measurement device and method aim at solving the problems that when an existing nuclear material level detector carries out measurement, a radiation source is likely to harm measurement workers and the environment, and the stability of measurement results is poor. Radiation ray energy released by a measured material in a tank is measured through a gamma-radiation detector, whether the level of the measured material in the tank reaches a calibration value or not is judged according to energy change features, and then a measurement signal is output; the energy is the minimum when no medium exits in the tank, the energy is increased when a medium exits in the tank, and the change condition of the material level is judged through comparison. In addition, the radiation ray receiving area is increased as a lateral receiving mode is adopted, and the stability of final measurement results is improved as the number of received pulses is increased. The passive nuclear material level measurement device and method are suitable for carrying out material level detection on media containing radionuclides.

Description

technical field [0001] The invention belongs to the field of nuclear level detection. Background technique [0002] For many years, the nuclear level detectors used in China are composed of three parts: detectors, radiation sources, and secondary instruments. Most of them are active radiation sources with high radiation intensity. With the development of the national economy, the requirements for environmental protection have become more stringent, followed by new and more requirements for level detection technology. There is a passive nuclear level detector with the publication number 103712668A. This kind of nuclear level detector adopts the method of end surface measurement. During the detection process, the radiation receiving area is small and the number of received pulses is small, which makes the stability of the measurement results poor. Contents of the invention [0003] The present invention aims to solve the problem that the radionuclides contained in the exist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F23/288
CPCG01F23/288
Inventor 赵孝文李岩赵弘韬闫海霞高雅娟范庆丽蒋继成
Owner TECHN PHYSICS INST HEILONGJIANG ACADOF SCI
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