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Tritium surface pollution monitor

A surface pollution monitoring and monitoring instrument technology, which is applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the problems of low hardware integration, difficulty in wide application, high price, etc., achieve high detection sensitivity and precision, improve detection efficiency, The effect of transferring data quickly

Inactive Publication Date: 2007-01-24
CHENGDU UNIVERSITY OF TECHNOLOGY +2
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Problems solved by technology

[0003] At present, the measurement of α / β / γ surface pollution has been carried out at home and abroad. Tritium belongs to β rays, but ordinary β measurement is mainly in the range of 100Kev~1Mev. Not very sensitive, so tritium needs to be measured specifically
[0004] For example, the latest generation of α / β / γ surface contamination surface detector of Canberra Company has high precision and good performance, but there is no special solid tritium surface pollution monitor, and the detection efficiency of β by using a flow-type proportional counter is only 50%. And due to import tariffs and hardware technology, the price is so expensive that it is difficult to be widely used by most domestic users
[0005] There are also similar products in China, such as the αβ surface pollution measuring instrument produced by Beijing Nuclear Instrument Factory and the αβγPC-01 portable surface pollution measuring instrument developed by the China Institute of Radiation Protection. Both use liquid scintillator detectors, and the hardware integration is low. Intelligent and anti-interference are poor, and the detection performance index for β-rays is not high. For example, the BH3206 surface pollution meter produced by Beijing Nuclear Instrument Factory has only 30% detection efficiency for β-rays
So they can't be well used to monitor the contamination of solid tritium surface

Method used

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Embodiment Construction

[0040] Tritium Surface Contamination Monitors (eg figure 1 ) is mainly composed of a detector, a signal acquisition module, a central processing unit, a USB interface, etc., and is equipped with various related functional peripherals to achieve the purpose of low cost, intelligence, high detection efficiency and fast transmission.

[0041] The detector of the tritium surface pollution measuring instrument uses a flow-type proportional counter. When the β-ray emitted by the tritium passes through the detector, the gas in it is ionized to form a positive and negative ion pair. The detector collects the charged particles and sends a signal through the signal acquisition module. After amplifying, shaping and widening, it is sent to the central processor for counting, because the number of pulses in the same time is determined by the intensity of β radiation, so the central processor records the number and generation time of these pulses, and analyzes them through software The corr...

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Abstract

The invention is related to instrument for monitoring pollution on surface of tritium in order to solve issues of high cost of device, low efficiency of detection, and poor anti-interference. The invention includes detector, module of signal acquisition, and CPU. Detector is proportional counter in flowing gas type. The counter is composed of cathode of metal covering, as well as anode in wire or piece in inner cavity. Being connected to the output of high voltage module, anode through signal line is connected to the input of the module of signal acquisition. There are gas inlet orifice and gas outlet orifice in the inner cavity. In time of operation, methane gas enters into the inner cavity through the gas inlet orifice, and outflows through the gas outlet orifice continually.

Description

Technical field: [0001] The present invention relates to devices for monitoring environmental contamination by beta rays, and more particularly to devices for monitoring tritium surface contamination levels. Background technique: [0002] The tritium surface pollution monitor detects β-rays to understand the tritium surface pollution and achieve the purpose of monitoring to ensure personal safety. [0003] At present, the measurement of α / β / γ surface pollution has been carried out at home and abroad. Tritium belongs to β rays, but ordinary β measurement is mainly in the range of 100Kev~1Mev. Not very sensitive, so tritium needs to be measured specifically. [0004] For example, the latest generation of α / β / γ surface contamination surface detector of Canberra Company has high precision and good performance, but there is no special solid tritium surface pollution monitor, and the detection efficiency of β by using a flow-type proportional counter is only 50%. And due to impo...

Claims

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Application Information

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IPC IPC(8): G01T1/169G01T1/16
Inventor 庹先国雷家荣高嵩成毅穆克亮
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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