Online measurement device for uranium concentration in solution

Abstract

The invention discloses an online measurement device for the uranium concentration in a solution. The online measurement device comprises an upper cover. First threaded holes allowing a pipeline to penetrate through are formed in the upper cover in the horizontal direction, and second threaded holes allowing circulating water to pass through are formed and are perpendicular to the first threaded holes in the horizontal direction. First O rings and hollow bolts penetrate through the pipeline and are screwed into the first threaded holes. A second O ring, a baffle and an intermediate plate are sequentially arranged at the lower portion of the upper cover. Bolts penetrate through first through holes in the bottom edge of the upper cover and second through holes in the edge of the intermediate plate and are connected with third through holes in the upper edge of a shielding bucket. A NaI crystal and a multi-channel energy disperse spectrometer are arranged inside the shielding bucket sequentially from top to bottom. Screws penetrate through threaded holes formed in the upper portion of the shielding bucket in the horizontal direction to fix the NaI crystal. A square hole allowing a power wire to penetrate through is formed in the lower portion of the shielding bucket. A base of the shielding bucket is provided with flange through holes used for fixing the base. The outer layer of the online measurement device is made of stainless steel, the inner layer of the online measurement deice is lead metal, and therefore the effect of uranium radiation resistance is good; the O rings and the threaded holes are used for fixing, so the online measurement device is simple in structure and good in sealing effect, and the testing cost is reduced.

Description

technical field [0001] The invention belongs to an online measuring device for uranium concentration, in particular to an online measuring device for uranium concentration in solution. Background technique [0002] The traditional measurement of uranium concentration in solution uses an off-line measurement method, which requires manual sampling, sample preparation, and then uses analytical equipment to measure the uranium concentration in the sample. The disadvantages of this method are: sample preparation is required, the measurement time is long, and sampling The interval is long and cannot reflect the process status on site in real time. [0003] In order to solve this problem, the concentration of uranium in the solution can be obtained by using NaI crystal and multi-channel energy spectrometer to measure the characteristic gamma ray intensity of uranium radiation, but during the measurement process, there are natural background radiation and other uranium solutions in ...

AI Technical Summary

Problems solved by technology

[0002] The traditional measurement of uranium concentration in solution uses an off-line measurement method, which requires manual sampling, sample preparation, and then uses analytical equipment to measure the uranium concentration in the sample. The disadvantages of this method are: sample preparation is required, the measurement time is long, and sampling Long intervals, unable to reflect the process status on site in real time

[0003] In order to solve this problem, the concentration of uranium in the solution can be obtained by using NaI crystal and multi-channel energy spectrometer to measure the characteristic gamma ray intensity of uranium radiation, but during the measurement process, there are natural background radiation and other uranium solutions in the environment The radiation will not only affect the measurement results. During the measurement process, the multi-channel energy spectrometer inevitably has the problem of peak position drift, which will lead to fluctuations in the measurement results and affect the stability of the measurement. When measuring hot solutions, The temperature will cause the gamma ray peak intensity value measured by the NaI crystal to change, which will affect the accuracy of the measurement results

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