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| An experimental study on collection and measurement of tritiated water vapor by air condensation method |
| DING Hongshen, ZHAO Xinjing, LIU Xiaolin |
| Shandong Nudear and Radiation Safety Monitoring Center, Jinan 250117 China |
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Abstract Objective To test the performance of air condensation method for collection and measurement of tritiated water vapor in air, to provide technical support for monitoring of tritiated water vapor in the surrounding environment of nuclear power plants.Methods The water vapor in air was condensed to liquid water, and the liquid water sample was distilled and purified, and the activity concentration of tritium in water was measured with a low background of liquid scintillation counter. The precision, accuracy and detection limit of the method are tested, and the applicability of the method were verified.Results The test results of several groups of samples in the laboratory show that, the average relative standard deviation was 14.2%, the relative error ranged from-9.8% to5.2%, and the lower detection limit was 13.7 mBq/m3, which was suitable for the collection and measurement of tritiated water vapor samples in air under humid environment.Conclusion This method can be used to collect and measure the samples of tritiated water vapor in the air around nuclear power plants in wet seasons.
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Received: 20 January 2018
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