Automatic measurement system and method of extrapolation ionization chamber

Abstract

The invention belongs to the technical field of radiation monitoring and particularly relates to an automatic measurement system and method of an extrapolation ionization chamber. The system comprises an electrometer which is connected with the extrapolation ionization chamber, a direct-current power supply unit of the electrometer is connected with an electrode plate of the extrapolation ionization chamber and used for providing power for the extrapolation ionization chamber, a charge measurement unit of the electrometer is connected with a collector electrode of the extrapolation ionization chamber and used for measuring ionization current of the extrapolation ionization chamber, the electrometer is connected with a computer which is used for controlling performing of measuring operation, the extrapolation ionization chamber is provided with a counter electrode distance adjusting device, the counter electrode distance adjusting device is connected with a programmable logic controller (PLC), and the PLC is connected with the computer. According to the automatic measurement system and method of the extrapolation ionization chamber, the operation is simplified, measuring errors are reduced, and the measuring stability is improved.

Description

technical field [0001] The invention belongs to the technical field of radiation monitoring, and in particular relates to an extrapolation ionization chamber automatic measurement system and method. Background technique [0002] In some cases in the field of radiation monitoring, it is necessary to operate radioactive materials under unshielded or very weak shielding, where the dose of beta radiation exceeds 50 times that of the same gamma radiation source. Especially in the case of radioactive material leakage, when it is necessary to remove radioactive contamination on the exposed surface, the staff have to work in a strong β-ray field, and the monitoring of β-absorbed dose is particularly important at this time. In the decades of production, research and application of my country's nuclear industry, β-ray burns accounted for a large proportion of exposure accidents. An extreme example of this situation is the Chernobyl nuclear accident, where the beta radiation doses rec...

AI Technical Summary

Problems solved by technology

However, the current extrapolation ionization chambers are all manually adjusted to change the distance between the electrodes of the ionization chambers. The entry of such measurement personnel will inevitably cause disturbances in the measurement environment of the extrapolation ionization chambers, so after each adjustment, it takes a period of time Finally, the measurement environment conditions can be stabilized again, which makes the general measurement process of the β-ray absorbed dose standard very long, and a routine measurement often takes several days to complete

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