Method and system for measuring total release rate of radon on surface of medium within certain time period

Abstract

The invention discloses a method and a system for measuring a total release rate of radon on the surface of a medium within a certain time period, and relates to the technical field of nuclear radiation detection. The method comprises the following steps of distributing and sampling; computing an average value of a radon precipitation rate on the surface of a to-be-measured medium in single measurement according to a sampling measurement result; computing the total release rate of the radon in unit area of a to-be-measure region within the certain time period; computing the total release rate of the radon on the surface of the medium within the certain time period. According to the method and the system for measuring the total release rate of the radon on the surface of the medium within the certain time period, disclosed by the invention, a region distribution rule on the surface of the medium can be measured through an activated carbon-gamma energy spectrum method, continuous measurement on the radon precipitation rate representing a measurement point can be carried out by using a radon precipitation rate continuous measurement method based on electrostatic collection, the change rule can be obtained, and a radon precipitation rate measuring instrument is used as a standard for correcting an activated carbon measurement result, so that an accurate average radon precipitation rate value is obtained, and the total release rate of the radon on the surface of the medium within the certain time period is obtained.

Description

technical field [0001] The invention relates to the technical field of nuclear radiation detection, in particular to a method and system for measuring the total amount of radon released from the surface of a medium within a certain period of time. Background technique [0002] At present, the main methods for measuring the radon exhalation rate of uranium tailings are: activated carbon-gamma energy spectroscopy, solid nuclear track method, electrostatic collection method, scintillation chamber method, etc. [0003] The solid nuclear track method is widely used in the measurement of the radiation field and absorbed dose of radiation protection level and environmental level, but this method takes a long time to obtain the radon exhalation rate, and the operation is complicated. The influence of diffusion on the measurement results cannot be ignored, and the measurement accuracy is poor. [0004] The scintillation chamber method is one of the most widely used methods for measu...

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Problems solved by technology

[0007] From the above description, it can be seen that the current measurement methods are difficult to reliably measure the total annual radon release from large-scale uranium tailings ponds

However, with the development of nuclear power, the demand for uranium increases, and the uranium mining and metallurgy industry will inevitably produce a large amount of uranium tailings. In order to provide the uranium required by the 1000MW(e) light water reactor, the annual uranium tailings will reach 6×10 4 t, after the decommissioning of uranium hydrometallurgy facilities, a large number of uranium tailings have accumulated in the tailings pool, which has accumulated certain radioactive elements in the tailings pool. The total annual release of radon on the surface of the uranium tailings pool is used to evaluate whether the decommissioning treatment of uranium mines meets the standard An important indicator, how to reliably measure the total annual radon release from uranium tailings ponds has always been the focus of research by researchers, but so far there is no method that can easily and reliably measure the total annual radon release from uranium tailings ponds

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