Minimum detectable activity concentration of online monitoring instrument in primary circuit of HTR-PM based on Monte Carlo simulation
The failure fraction of tri-structural isotropic (TRISO)-coated particles in the fuel elements of the core is a key indicator for characterizing the radiation safety of a high-temperature gas-cooled reactor (HTGR) and can be determined from accurate measurement of the activity concentrations of nobl...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Nuclear Engineering and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573324003693 |
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| author | Rui Nie Yu Wang Ziling Zhou Feng Xie Jun Zhao Jianzhu Cao Qian Ma Xi Chen |
| author_facet | Rui Nie Yu Wang Ziling Zhou Feng Xie Jun Zhao Jianzhu Cao Qian Ma Xi Chen |
| author_sort | Rui Nie |
| collection | DOAJ |
| description | The failure fraction of tri-structural isotropic (TRISO)-coated particles in the fuel elements of the core is a key indicator for characterizing the radiation safety of a high-temperature gas-cooled reactor (HTGR) and can be determined from accurate measurement of the activity concentrations of noble gas fission products in the primary coolant. However, in the high-temperature gas-cooled reactor pebble-bed module (HTR-PM), the total γ activity concentration in the primary circuit is currently monitored online without individual nuclide resolution. In this study, an online monitoring instrument based on a HPGe detector is proposed to obtain the activity concentration of individual nuclide in real time. Geant4 simulates detection efficiency, background energy spectrum, and minimum detectable activity concentration (MDAC) of the monitoring system, which are key parameters for evaluating the reliability and feasibility of the system for detecting noble gas fission products. In addition, a method for quickly calculating the MDAC using fitting formulas with low and high precisions is proposed, meeting the accuracy requirements for engineering applications. This study promotes application of online nuclide resolution technology in HTGR for fast assessment of fuel-element performance in the core. The proposed rapid MDAC evaluation method for detection systems can also be applied in nuclear emergency monitoring. |
| format | Article |
| id | doaj-art-0bd2c30a38f54880bfad4287895f0151 |
| institution | Kabale University |
| issn | 1738-5733 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj-art-0bd2c30a38f54880bfad4287895f01512025-01-12T05:24:33ZengElsevierNuclear Engineering and Technology1738-57332025-01-01571103122Minimum detectable activity concentration of online monitoring instrument in primary circuit of HTR-PM based on Monte Carlo simulationRui Nie0Yu Wang1Ziling Zhou2Feng Xie3Jun Zhao4Jianzhu Cao5Qian Ma6Xi Chen7Institute of Nuclear and New Energy Technology, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Tsinghua University, Beijing, 100084, ChinaInstitute of Nuclear and New Energy Technology, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Tsinghua University, Beijing, 100084, ChinaInstitute of Nuclear and New Energy Technology, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Tsinghua University, Beijing, 100084, ChinaInstitute of Nuclear and New Energy Technology, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Tsinghua University, Beijing, 100084, China; Corresponding author. Room 110, Energy Science Building D, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China.Institute of Nuclear and New Energy Technology, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Tsinghua University, Beijing, 100084, ChinaInstitute of Nuclear and New Energy Technology, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Tsinghua University, Beijing, 100084, ChinaHuaneng Shandong Shidao Bay Nuclear Power Company LTD, Rongcheng, 264300, ChinaHuaneng Shandong Shidao Bay Nuclear Power Company LTD, Rongcheng, 264300, ChinaThe failure fraction of tri-structural isotropic (TRISO)-coated particles in the fuel elements of the core is a key indicator for characterizing the radiation safety of a high-temperature gas-cooled reactor (HTGR) and can be determined from accurate measurement of the activity concentrations of noble gas fission products in the primary coolant. However, in the high-temperature gas-cooled reactor pebble-bed module (HTR-PM), the total γ activity concentration in the primary circuit is currently monitored online without individual nuclide resolution. In this study, an online monitoring instrument based on a HPGe detector is proposed to obtain the activity concentration of individual nuclide in real time. Geant4 simulates detection efficiency, background energy spectrum, and minimum detectable activity concentration (MDAC) of the monitoring system, which are key parameters for evaluating the reliability and feasibility of the system for detecting noble gas fission products. In addition, a method for quickly calculating the MDAC using fitting formulas with low and high precisions is proposed, meeting the accuracy requirements for engineering applications. This study promotes application of online nuclide resolution technology in HTGR for fast assessment of fuel-element performance in the core. The proposed rapid MDAC evaluation method for detection systems can also be applied in nuclear emergency monitoring.http://www.sciencedirect.com/science/article/pii/S1738573324003693High temperature gas-cooled reactorFailure fraction of TRISO coated particlesMinimum detectable activity concentrationDetection efficiencyGeant4 |
| spellingShingle | Rui Nie Yu Wang Ziling Zhou Feng Xie Jun Zhao Jianzhu Cao Qian Ma Xi Chen Minimum detectable activity concentration of online monitoring instrument in primary circuit of HTR-PM based on Monte Carlo simulation Nuclear Engineering and Technology High temperature gas-cooled reactor Failure fraction of TRISO coated particles Minimum detectable activity concentration Detection efficiency Geant4 |
| title | Minimum detectable activity concentration of online monitoring instrument in primary circuit of HTR-PM based on Monte Carlo simulation |
| title_full | Minimum detectable activity concentration of online monitoring instrument in primary circuit of HTR-PM based on Monte Carlo simulation |
| title_fullStr | Minimum detectable activity concentration of online monitoring instrument in primary circuit of HTR-PM based on Monte Carlo simulation |
| title_full_unstemmed | Minimum detectable activity concentration of online monitoring instrument in primary circuit of HTR-PM based on Monte Carlo simulation |
| title_short | Minimum detectable activity concentration of online monitoring instrument in primary circuit of HTR-PM based on Monte Carlo simulation |
| title_sort | minimum detectable activity concentration of online monitoring instrument in primary circuit of htr pm based on monte carlo simulation |
| topic | High temperature gas-cooled reactor Failure fraction of TRISO coated particles Minimum detectable activity concentration Detection efficiency Geant4 |
| url | http://www.sciencedirect.com/science/article/pii/S1738573324003693 |
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