Radiation detection device

Abstract

The invention discloses a radiation detection device. The radiation detection device comprises a detector and a shell, wherein the shell is internally provided with a containing space, the detector iscontained in the containing space, the thickness of the shell is five times or greater than the thickness of a half-value layer corresponding to a ray, the thickness of the half-value layer is the thickness of a substance when the energy of the ray is attenuated to one half of the initial value, and the shell is provided with through holes which extend into the containing space from the outer portion of the shell. According to the radiation detection device, measurement can be performed just by placing the detector and the shell in waste liquid, it is not needed to reform a radioactive wasteliquid pond, sampling measurement by multiple times is not needed, operation is convenient, measurement efficiency is improved, and cost is lowered; and meanwhile, the influence of the external ray onthe detector is isolated through the shell, and therefore the precision of measured data is improved to the maximum extent.

Description

Technical field [0001] The invention relates to the field of radiation detection, and more specifically to a radiation detection device for monitoring radioactive waste liquid. Background technique [0002] With the application and promotion of nuclear technology in the medical field, more and more large tertiary hospitals have opened radionuclide therapy wards and used high-energy radionuclides to treat various diseases, such as the use of iodine 131 nuclide to treat differentiated thyroid Patients undergoing treatment after cancer surgery, because differentiated thyroid cancer tissue can take up iodine specifically like normal thyroid tissue, thyroid cancer patients take a large dose of iodine 131 after oral administration, and it is taken up by thyroid tissue, residual cancer tissue and metastases through the blood , The beta rays emitted by iodine 131 during the decay process have a killing effect on cancer cells, leading to necrosis of residual cancer tissues, thereby reduci...

AI Technical Summary

Problems solved by technology

[0004] However, the existing technology has at least the following problems when monitoring the specific activity in the radioactive decay cell: firstly, the manual operation of the sampling method is cumbersome, and operators need to frequently contact dangerous radioactive liquids, which has a high risk; secondly, the sampling area It has limitations, usually it can only be sampled at the liquid level of the radioactive decay pool, which cannot truly reflect the specific activity of the excrement and waste liquid in the entire decay pool; third, the measurement results are not real-time, and the data is collected after sampling. As a result, the data lags behind and cannot provide real-time specific activity values; fourth, the bypass detector method needs to modify the existing pipeline, which is complicated to install and high in cost; finally, the measurement deviation is large, and the radiation in the environment will affect the detector. The results have an impact, and the difference in the pipeline (thickness, diameter, etc.) environment during installation will cause deviations in the measured values ​​​​of the detector

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