期刊：
Journal of Physics: Conference Series,2020年1549(2):022018 ISSN：1742-6588
作者机构：
[Wanfa Fu; Quan Tang] School of Nuclear and Technology, University of South China, Hengyang 421001, China;[Ming Wen; Zhi Zhang; Tao Tang] Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, China;[Peng Fan] School of Nuclear and Technology, University of South China, Hengyang 421001, China<&wdkj&>Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, China
摘要：
<jats:title>Abstract</jats:title>
<jats:p>Gas flowing calorimetry is considered to be one of the most promising tritium measurements method in fusion fuel cycles, yet the parametric study of the structure design is still insufficient. In this study, three-dimensional models, combining with commercial computational fluid software, has been used to evaluate the calorimetric performance of tritium storage beds. The effects of structural geometry and cooling method on the heat transfer behavior have been systematically studied. The results show that the proposed model can effectively characterizes the evolution of the temperature difference of the cooling gas with time during the calorimetric process. Typically, increasing number of the U-shaped cooling tubes, thickness of the metal hydride layer and flow rate of the cooling liquid are beneficial for reducing the thermal equilibrium time. When the number of calorimeter bed cooling tubes is 12, the thickness of the metal hydride layer is 23, and the cooling gas is 20 SLMP of CO2, the thermal equilibrium time is only 4.5h. Furthermore, through optimizing the structural parameters, which can have an important influence on calorimetric performance, highly efficient and accurate gas flow calorimeter can be developed in the future.</jats:p>
作者：
Xie, L. F.;Liu, J. C.;Qiu, S. K.;Guo, C.;Yang, C. G.;...
期刊：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,2020年976:164266 ISSN：0168-9002
通讯作者：
C. Guo<&wdkj&>Q. Tang
作者机构：
[Xie, L. F.; Qiu, S. K.; Tang, Q.] School of Nuclear Science and Technology, University of South China, Hengyang, China;[Liu, J. C.; Guo, C.; Zhang, Y. P.; Zhang, P.] Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Science, Beijing, China;School of Physics, University of Chinese Academy of Science, Beijing, China;[Yang, C. G.] Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Science, Beijing, China<&wdkj&>School of Physics, University of Chinese Academy of Science, Beijing, China
通讯机构：
[C. Guo] K;[Q. Tang] S;School of Nuclear Science and Technology, University of South China, Hengyang, China<&wdkj&>Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Science, Beijing, China
会议名称：
9th International Conference on High Levels of Environmental Radiation Areas - For Understanding Chronic Low-Dose-Rate Radiation Exposure Health Effects and Social Impacts
会议时间：
SEP 24-27, 2018
会议地点：
Hirosaki Univ, Aomori, JAPAN
会议主办单位：
Hirosaki Univ
摘要：
For more accurate measurement of the potential alpha energy concentration (PAEC) of radon progeny by the liquid scintillation counting (LSC) method, its counting efficiency was studied in this work. A radon progeny standard source was used to provide different concentrations of radon progeny, and the progeny collected on the sampling filters were measured with a low background liquid scintillation counter. The result showed that the quenching effect could not be ignored, and the counting efficiency was estimated to be 86.12%. The co-comparison experiments showed that the PAECs of radon progeny measured by the LSC methods were in generally consistent with those of other three methods. It indicates that for more accurate measurements of PAEC of radon progeny by using the LSC method, the counting efficiency should be well determined.
作者机构：
[唐泉] School of Nuclear Science and Technology, University of South China, Hengyang, 421001, China;[梁珺成; 杨志杰; 张明; 刘皓然; 赵清] Department of Ionizing Radiation, National Institute of Metrology, Beijing, 100029, China;College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China;[符燕] School of Nuclear Science and Technology, University of South China, Hengyang, 421001, China<&wdkj&>Department of Ionizing Radiation, National Institute of Metrology, Beijing, 100029, China;[邹宇] Department of Ionizing Radiation, National Institute of Metrology, Beijing, 100029, China<&wdkj&>College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
通讯机构：
School of Nuclear Science and Technology, University of South China, Hengyang, China
作者机构：
[刘茹佳; 唐泉; 丘寿康; 吴淼; 陈颖] School of Nuclear Science and Technology, University of South China, Hengyang;421001, China;[刘茹佳; 唐泉; 丘寿康; 吴淼; 陈颖] 421001, China
通讯机构：
School of Nuclear Science and Technology, University of South China, Hengyang, China
作者机构：
[吴淼; 丘寿康; 李连山; 李军; 唐泉] Institute of Nuclear Science and Technology, University of South China, Hengyang, 421001, China;[刘茹佳] Surveillance Station of Xinjiang Radiation Environment, Urumqi, 830011, China
通讯机构：
Institute of Nuclear Science and Technology, University of South China, Hengyang, China
摘要：
The detection efficiency of electrostatic collection radon monitors is influenced by the humidity of the air in the collection cell. This is due to the recombination of positively charged 218Po with OH− ions, whose concentration depends on humidity. A novel design of an electrostatic collection cell, in which the air pressure in the cell is less than the atmospheric pressure, is proposed to eliminate the impact of humidity. As a result of the lower air pressure, the drift velocity of the positively charged 218Po in the electric field increases, so the collection time decreases. A model predicting the collection efficiency of positively charged 218Po in this kind of electrostatic collection cell is presented. Based on the model, if the air pressure in the cell is sufficiently low, the collection efficiency will be approximately a constant and the dependency of the collection efficiency of the positively charged 218Po upon the water vapor concentration can be ignored. This approach can be applied to develop a new radon monitor.
