Method and device for continuous online monitoring of alpha and beta radioactivity in fluid

Abstract

The invention relates to a method and a device for continuous online monitoring of alpha and beta radioactivity in fluid. The device comprises a fluid early treatment device having a device fluid inlet, a sampler, a particle filter, a gamma probe and a pressure flow regulator. An output end of the fluid early treatment device is connected with input ends (detector fluid inlets) of alpha and beta detectors. In each of the alpha and beta detectors, one output end (detector fluid outlet) is connected to a device fluid outlet and the other output end (plexiglass window) is connected to a signal processing unit via a photomultiplier tube. An output end of the signal processing unit is connected to a field display processing unit. The present invention reduces the distance between a radioactive material and a scintillator, so that most of the energy of alpha and beta particles are deposited in the scintillator to excite the scintillator to emit light. In addition, the sensitive area measured is greatly increased, the detection efficiency is improved and the light transmission efficiency is significantly improved.

Description

technical field [0001] The invention relates to radiation measurement technology, in particular to a method and device for continuous on-line monitoring of fluid total alpha and total beta radioactivity based on scintillation fiber or scintillation fiber tube array detectors. Background technique [0002] The difficulty of online measurement of α and β particles in fluid is that the range of α and β particles in the fluid is relatively short. If the scintillator line of the detector is too large, the α and β particles are often absorbed by the fluid before reaching the scintillator. It is difficult to achieve the purpose of detection. The core problem of measuring α and β is to make α and β particles pass through the fluid as short as possible, enter the scintillator to form energy deposition, and finally form a detection signal and transmit it out. When measuring α and β particles in fluid, scintillators with two structures are often used, one uses a plurality of flat scin...

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Problems solved by technology

[0003] The object of the present invention is to solve the problem that the range of α and β particles in the fluid is short and the linearity of the scintillator needs to be reduced, and to provide a continuous on-line system for the total α and total β radioactivity of the fluid based on the scintillation fiber or scintillation fiber tube array detector. Monitoring method to realize continuous monitoring of alpha and beta radioactivity in fluid

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