Searching device and searching method for radioactive source

Abstract

The invention discloses a searching device and a searching method for a radioactive source. The searching device comprises an upright post, wherein a cross bar is arranged at the top, close to the cross bar, of two sides of the upright post; the two cross bars can horizontally and vertically move on the upright post; a large crystal detector is arranged below one cross bar; a small crystal detector group is arranged below the other cross bar. According to the searching device and the searching method disclosed by the invention, a detection area is preliminarily determined by using the large crystal detector, searching and approaching are performed by using the small crystal detector group, and finally, a searching aim is achieved, so that the actual searching work is simplified, the searching period is shortened, and the searching efficiency is improved; the searching device and the searching method have better accuracy; by combining the searching method with detecting devices, the inaccuracy of the device in an actual searching process due to over large searching area is made up; the flexibility in use is realized, and the range of an abnormal area can be determined by adjusting parameters about an angle between the detectors, detection height, the size of a collimator and the like, thereby determining the position of the radioactive source more quickly.

Description

technical field [0001] The invention relates to a nuclear radiation measuring device and method, in particular to a radioactive source searching device and searching method. Background technique [0002] In the past 20 years, the number of radioactive sources in my country has grown at an average annual rate of 15%, and they have been widely used in various industries such as industry, agriculture, and medical treatment. However, during the development, use, storage, and transportation of sources, incidents of losing radioactive sources are frequent occur, resulting in loss of manpower and material resources. Therefore, after the radioactive source is lost, a reasonable plan should be designed to search for the source as soon as possible using the known information to avoid greater impact on the public and the environment. [0003] At present, in foreign countries, the lost radioactive sources are mainly searched by airborne or vehicle-mounted large crystal sodium iodide det...

AI Technical Summary

Problems solved by technology

[0004] Although the search for lost radioactive sources using the walking carpet method is more comprehensive to detect the search area, but due to the size of the search area and the uncertainty and unknowns in the search process, the search work will be aggravated and the search time will be longer. Reduced search efficiency, sometimes causing radiation damage to search workers

Although the use of vehicle-mounted carpet search will shorten the search time, the accuracy of detection will also be reduced, and even missing areas will appear, which will complicate the search work.

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