Waste gas collecting device and method for radionuclide synthesis

Abstract

The invention relates to a waste gas collecting device and method for radionuclide synthesis. The waste gas collecting device comprises a synthesis hot chamber and an activated carbon adsorption assembly, wherein the synthesis hot chamber comprises a waste gas synthesis module, a cutting sleeve valve module and a waste gas collecting module; a waste gas discharge port is formed in the waste gas synthesis module and is connected with the cutting sleeve valve module so as to discharge waste gas into the cutting sleeve valve module; the waste gas collecting module is connected with the cutting sleeve valve so as to collect and treat waste gas discharged into the cutting sleeve valve module; the activated carbon adsorption assembly is connected with the cutting sleeve valve module so as to adsorb and filter the waste gas discharged from the waste gas collecting module. Direct emission of radioactive waste gas can be avoided, and the waste gas is adsorbed and filtered through the activated carbon adsorption assembly; and an independent shielding protection chamber does not need to be arranged, space is not occupied, consumables are simple, and the use cost is low.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a waste gas collection device and collection method used in radionuclide synthesis. Background technique [0002] At present, with the extensive promotion of nuclear medicine and nuclear medicine, the production and development of radiopharmaceuticals such as positron diagnostic drugs (FDG) are becoming more and more common. Some chemical drugs are labeled with radioactive elements such as F-18, and positron tomography is used to Scanning technology (PET) can effectively diagnose the disease, so that targeted treatment can be carried out. Radionuclides such as F-18 are currently mainly produced by proton cyclotrons and transported to synthesis hot cells for radiolabelling. [0003] Since radioactive nuclides are marked and synthesized by the synthesis module in the hot chamber, a small amount of radioactive aerosols are produced at the same time. In the current market,...

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Problems solved by technology

[0004] In the current market, the treatment methods for radioactive waste gas containing F-18 have the following defects: (1) For the method of collecting air with external mechanical compression, the equipment required is huge, and a separate shielding room or shielding body needs to be set up for equipment protection , expensive, difficult to market

(2) For the method of direct discharge after adsorption of external high-efficiency activated carbon, the high-efficiency activated carbon device connected to the end of the exhaust pipe through the discharge port of the synthesis heat chamber, and directly discharged after adsorption. The activated carbon device has a high instantaneous dose and becomes a secondary radiation source, which requires sufficient shielding protection, and there is still a small amount of unfiltered F-18-containing waste gas that is directly discharged into the atmosphere, which is likely to cause environmental pollution and bring greater radiation to the surrounding population risk

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