Segmented gamma scanning device for low-level radioactive waste bin

Abstract

The invention provides a segmented gamma scanning device for a waste bin. The device comprises a detection device, a lead shielding body, a supporting platform, a rotating device, a driving device, alifting device and the waste bin, and the supporting platform comprises an upper platform and a lower base; the upper platform is provided with the lead shielding body and the detection device, and the detection device detects the waste bin entering the lead shielding body; the lifting device is arranged between the upper platform and the lower base and can drive the waste bin to move up and downbetween the lower base and the lead shielding body. The driving device is arranged on the lower base and can drive the rotating device to reciprocate between the lower base and the lifting device; therotating device can drive the waste bin to rotate. The influence of the environmental background on the measurement result of the low-level radionuclide in the waste bin is eliminated, the problem that an existing SGS device with a shielded lead chamber cannot detect the whole waste bin is solved, materials are saved, and the cost is reduced, and the problem of radioactive contamination in the lead chamber is avoided.

Description

technical field [0001] The invention relates to the field of nuclear power detection, in particular to a waste barrel segmented gamma scanning device. Background technique [0002] With the rapid development of my country's nuclear power industry, a large amount of low-level radioactive waste will be generated during the operation of nuclear power plants. The activity concentration of short-lived radionuclides in low-level radioactive waste can be high, and the content of long-lived radionuclides is limited, which requires effective containment and isolation for hundreds of years. Can be disposed of in near-surface disposal facilities with engineered barriers from the surface to a depth of 30 m underground. Therefore, in order to minimize the impact of radioactive radiation on people and the environment, according to the relevant regulations of "Radioactive Waste Management" (GB14500-2002), low-level radioactive waste must be measured for the nuclei and their activity distr...

AI Technical Summary

Problems solved by technology

At present, there are many defects in the measurement of low-level radioactive waste. For example, large shielded lead chambers are mostly used, and more lead materials are used, which increases the cost of the device; it is easy to cause radioactive pollution in the lead chamber.

In addition, the high-purity germanium detector used in the measurement needs to be cooled by liquid nitrogen, which has a large volume and is limited in movement in the lead chamber.

It is impossible to measure more positions on the vertical height of the waste bin, and the reconstruction of the nuclei and their activity distribution in the entire bin will cause large errors; the removal of the waste bin is more troublesome, and the flexibility of the device is poor, etc.

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