Method and device utilizing solid point source to calibrate liquid effluent monitor
A monitor and effluent technology, applied in the field of monitor probe efficiency calibration, can solve the problem of whether the detection efficiency has changed greatly, etc.
Inactive Publication Date: 2018-03-09
CHINA INST FOR RADIATION PROTECTION
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- Application Information
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Problems solved by technology
Domestically, relatively little work has been done on the calibration of liquid effluent monitors. Most manufacturers do not do regular calibration. Whether there is a big change in the detection efficiency of the probe, if it is still within the allowable range of change, use the sensitivity data given by the manufacturer for a long time
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[0017] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0018] Such as figure 1 As shown, in the specific operation of the present invention, the first step of the numerical integration method is to determine the placement position of the solid γ point source. Here, the present invention designs a set of positioning devices that can be used to locate the solid point source in the pipeline. The positioning device consists of a fastening ring and three scales, wherein the first scale is fixed on the fastening ring; the second scale is vertically connected to the first scale, and can be adjusted by adjusting the first scale The thread to adjust the coordinates of the second scale on the first scale; the third scale is vertically connected to the second scale through a slide rule, and can also move relative to the second scale, and in Its end can be installed with a solid point source; install the fastening r...
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Abstract
The invention relates to a method and device utilizing a solid point source to calibrate a liquid effluent monitor. The device comprises a fastening ring and three scales, wherein the first scale is fixed on the fastening ring, the second scale is perpendicularly connected with the first scale, a coordinate of the second scale on the first scale can be adjusted through adjusting thread of the first scale, the third scale is perpendicularly connected with the second scale through a sliding rule and can move relative to the second scale, a tail end of the third scale can be equipped with the solid point source, the fastening ring is fixed at one end of a pipeline identical to materials and internal and external diameters of a pipeline measured by the monitor, and the fastening ring and the pipeline are concentrically arranged. Through a value integration means, detection efficiency of the monitor for certain-energy gamma rays of a liquid source can be lastly acquired. The method is advantaged in that inconvenience caused by liquid source calibration can be avoided, and measurement of the solid gamma point source is only needed in the whole process.
Description
technical field [0001] The invention relates to the technical field of monitor probe efficiency calibration in radiation monitoring, and relates to a method for accurately and reliably determining the detection efficiency of a non-interventional liquid effluent continuous on-line monitor. Background technique [0002] In order to meet the requirements of accurate and reliable data reported by the environmental supervision department, the accuracy of the liquid effluent monitoring data of nuclear facilities must be guaranteed, that is, the monitors must be calibrated. Domestically, relatively little work has been done on the calibration of liquid effluent monitors. Most manufacturers do not do regular calibration. Check whether the detection efficiency of the probe has changed significantly. If it is still within the allowable range of change, use the sensitivity data given by the manufacturer for a long time. Therefore, it is urgent to find an effective liquid effluent moni...
Claims
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Login to View More IPC IPC(8): G01T7/00
CPCG01T7/005
Inventor 唐智辉陈立韦应靖商洁王勇李强冯梅方登富张庆利
Owner CHINA INST FOR RADIATION PROTECTION