Method and equipment for determining background of uranium hexafluoride gas uranium abundance measuring device

Abstract

The invention provides a method and equipment for determining the background of a uranium hexafluoride gas uranium abundance measuring device. The method includes the flow step, the sealing step, the measurement step and the calculation step. In the flow step, UF6 gas of the same kind is made to flow into or flow out of a measuring container. In the sealing step, the measuring container is sealed, and then the UF6 gas in the measuring container is made to stop flowing. In the measurement step, after the pressure of the UF6 gas in the measuring container is steady, the gamma ray section of interest gross-count rate value, the pressure value and the temperature value of the UF6 gas are measured. In the calculation step, under the condition that the flow step, the sealing step and the measurement step are repeatedly executed for n times to acquire n gamma ray section of interest gross-count rate values, n pressure values and n temperature values, and the gamma ray section of interest background counting rate value of the UF6 gas uranium abundance measuring device is calculated by the utilization of the measured n gamma ray section of interest gross-count rate values, the measured n pressure values and the measured n temperature values, wherein n is an integer which is larger than or equal to 2.

Description

technical field [0001] The invention relates to a device for measuring the uranium abundance of uranium hexafluoride gas, in particular to a method and equipment for determining the background of the device for measuring the uranium abundance of uranium hexafluoride gas. Background technique [0002] A uranium enrichment plant is a nuclear facility that conducts uranium enrichment activities, and is one of the key objects of arms control inspection and safeguard supervision. Uranium enrichment plants use mass spectrometers to monitor UF in pipelines 6 (Uranium hexafluoride) gas in uranium ( 235 U) Abundance, this technology has high precision, but the operation is complicated, the cost is high, the analysis cycle is long, and professionals are required. The online uranium enrichment technique consists of two parts: 235 Measurement of U amount and UF 6 Measurement of the total amount of uranium in a gas. 235 The measurement of the amount of U is determined by measuring t...

AI Technical Summary

Problems solved by technology

This method is complicated to operate, takes a long time (at least 3 hours for each measurement), requires human intervention, has large measurement errors, and does not conform to the actual operating conditions of the device (the device is measured in the presence of gas, and the background is in the absence of gas measurement)

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