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논문 기본 정보

자료유형
학술저널
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저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제51권 제4호
발행연도
2019.1
수록면
1,169 - 1,175 (7page)

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The minimum detectable activity (MDA) value was derived according to the flow rate of the sample anddegree of amplification of the device by sending the sample directly from the collection site to thedetection part through a pump. This method can lead to reduction in time and cost compared to theexisting measurement method that uses a pre-treatment process. In this study, experiments wereconducted on 3H and 90Sr, which are the major pure beta-emitting radionuclides, by setting the sampleflow rate and the amplification gain as factors. The MDA values were derived according to the flow rates,considering that the flow rate can affect the MDA values. There were no change in the MDA underdifferent flow rates of 0, 600, 800, and 1000 mL/min. Therefore, it was confirmed that the flow rate maynot be considered when collecting samples for monitoring in actual field. As the degree of amplificationof the amplifier increased, the time required to reach the target MDA decreased. When the amplificationwas quadrupled, the detection efficiency increased by approximately 23.4 times, and the time to reachthe MDA decreased to approximately 1/550 times. This method offers the advantage of real-time on-sitemonitoring.

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