CN-121995430-A - Manufacturing device of calibration source of radioactivity monitor

Abstract

The application provides a manufacturing device of a calibration source of a radioactivity monitor, which comprises an aerosol generating unit, an aerosol processing unit and a calibration source manufacturing unit, wherein the aerosol generating unit comprises a first container and an atomization assembly, the first container is provided with a storage cavity, the atomization assembly is used for atomizing a radioactivity standard solution to form aerosol, the aerosol processing unit comprises a second container, the second container is provided with a processing space, the processing space is communicated with the storage cavity, the calibration source manufacturing unit comprises a sealing assembly, a deposition space capable of being opened and closed is arranged, the deposition space is communicated with the processing space, at least part of a calibration filter membrane can be detachably arranged in the deposition space, the deposition space is partitioned into an upstream space and a downstream space, and the upstream space is communicated with the processing space. The manufacturing device in the embodiment of the application enables the deposition state of the radionuclide deposited on the calibration filter membrane to be similar to the deposition state in the actual working process.

Inventors

• ZHANG XINYU
• CHEN XILIN
• Huang dihua
• ZHU HENG
• ZHU BAOJI
• YANG YUHAN
• LUO MINGJIE
• ZHENG JIANNING
• ZHANG YUXUAN

Assignees

• 中国原子能科学研究院

Dates

Publication Date

20260508

Application Date

20260211

Claims (10)

1. 1. A device for manufacturing a calibration source for a radiation monitor for manufacturing a calibration filter into a calibration source, comprising: The aerosol generating unit comprises a first container and an atomization assembly, wherein the first container is provided with a storage cavity, and the atomization assembly is used for atomizing a radioactive standard solution in the storage cavity to form aerosol; An aerosol treatment unit comprising a second container provided with a treatment space in communication with the storage chamber for the aerosol to enter the treatment space; The calibration source manufacturing unit comprises a sealing assembly, a deposition space capable of being opened and closed is arranged, the deposition space is communicated with the processing space, at least part of the deposition space used for calibrating the filter membrane can be detachably arranged in the deposition space, the deposition space is partitioned into an upstream space and a downstream space, and the upstream space is communicated with the processing space.
2. 2. The manufacturing apparatus of claim 1, comprising a first conduit that communicates the storage chamber with the processing space, at least a portion of the first conduit extending in a vertical direction.
3. 3. The manufacturing apparatus of claim 1, wherein the second container further comprises a converging space that is located below the processing space and communicates with the converging space.
4. 4. The manufacturing apparatus according to claim 1, wherein the inner wall of the processing space is laid with a hydrophobic layer.
5. 5. The apparatus according to claim 1, further comprising a second pipe that communicates the upstream space and the processing space, and a particle size spectrometer for acquiring particle size distribution data of the aerosol entering the upstream space via the second pipe.
6. 6. The apparatus of claim 5, further comprising a detection conduit, both ends of the detection conduit being in selective communication with the second conduit or closed, the particle size spectrometer being in communication with the detection conduit.
7. 7. The apparatus according to claim 1, wherein the calibration source manufacturing unit further comprises a switching mechanism and a measuring station, the measuring station being provided with an activity measurer, the switching mechanism being configured to drive the calibration filter in the deposition space to move to the measuring station so that the activity measurer detects the activity of the calibration filter.
8. 8. The manufacturing apparatus of claim 1 further comprising a first temperature and humidity sensor in communication with the deposition space.
9. 9. The manufacturing apparatus of claim 1 further comprising a filter unit in communication with the downstream space, the filter unit for collecting aerosol particles.
10. 10. The manufacturing apparatus of claim 9, further comprising a discharge unit; the exhaust unit comprises an exhaust pipeline and a first fan, the exhaust pipeline is communicated with the outlet of the filtering unit and the outside of the manufacturing device, and the first fan is used for driving gas in the exhaust pipeline; And/or the discharge unit comprises a circulating pipeline and a second fan, wherein the circulating pipeline is communicated with the outlet of the filtering unit and at least one of the storage cavity and the processing space, and the second fan is used for driving gas in the circulating pipeline.

Description

Manufacturing device of calibration source of radioactivity monitor Technical Field The present application relates to a radioactivity monitoring technology, and more particularly, to a device for manufacturing a calibration source of a radioactivity monitor. Background In applications such as radioactive aerosol monitoring and environmental radioactivity measurement, a radioactivity monitor usually samples and enriches particulate radioactive substances in air through a filter membrane in an actual working state, and measures a deposition layer formed on the filter membrane. To ensure the magnitude traceability and consistency of the measurement results, the radioactivity monitor needs to be subjected to verification, calibration or performance check. In the related art, a plating plane source formed by depositing a radioactive substance on a surface of a plating substrate by electroplating is used as a calibration source. However, the manner of aerosol deposition on the filter membrane under the actual working condition of the electroplating process is different from that of the radioactivity monitor, and the spatial distribution, the surface density and the equivalent thickness of the radioactive substance on the electroplating substrate may deviate from the state formed by deposition in the actual sampling process, so that the self-absorption and detection efficiency characteristics are inconsistent with those of the actual sample, and the accuracy of the calibration result is affected. Disclosure of Invention The embodiment of the application provides a device for manufacturing a calibration source of a radioactive monitor, wherein the manufactured calibration source is more in line with the actual working condition, and is beneficial to improving the accuracy of a calibration result. The technical scheme of the embodiment of the application is realized as follows: The embodiment of the application provides a manufacturing device of a calibration source of a radioactivity monitor, which is used for manufacturing a calibration filter membrane into the calibration source and comprises the following steps: The aerosol generating unit comprises a first container and an atomization assembly, wherein the first container is provided with a storage cavity, and the atomization assembly is used for atomizing a radioactive standard solution in the storage cavity to form aerosol; An aerosol treatment unit comprising a second container provided with a treatment space in communication with the storage chamber for the aerosol to enter the treatment space; The calibration source manufacturing unit comprises a sealing assembly, a deposition space capable of being opened and closed is arranged, the deposition space is communicated with the processing space, at least part of the deposition space used for calibrating the filter membrane can be detachably arranged in the deposition space, the deposition space is partitioned into an upstream space and a downstream space, and the upstream space is communicated with the processing space. In some embodiments, the manufacturing apparatus includes a first conduit that communicates the storage chamber with the processing space, at least a portion of the first conduit extending in a vertical direction. In some embodiments, the second container further comprises a converging space located below the processing space and communicating with the converging space. In some embodiments, the inner wall of the treatment space is lined with a hydrophobic layer. In some embodiments, the manufacturing apparatus further comprises a second conduit communicating the upstream space and the processing space, and a particle size spectrometer for obtaining particle size distribution data of the aerosol entering the upstream space via the second conduit. In some embodiments, the manufacturing apparatus further comprises a detection conduit, both ends of which are in selective communication with the second conduit or are closed, and the particle size spectrometer is in communication with the detection conduit. In some embodiments, the calibration source manufacturing unit further includes a switching mechanism and a measurement station, the measurement station is provided with an activity measurer, and the switching mechanism is used for driving the calibration filter membrane in the deposition space to move to the measurement station, so that the activity measurer detects the activity of the calibration filter membrane. In some embodiments, the manufacturing apparatus further comprises a first temperature and humidity sensor in communication with the deposition space. In some embodiments, the manufacturing apparatus further comprises a filter unit in communication with the downstream space, the filter unit for collecting aerosol particles. In some embodiments, the manufacturing apparatus further comprises a discharge unit; the exhaust unit comprises an exhaust pipeline and a first fan, the exhaust pip