{"title":"B-CTMFD 探测器与 Ludlum 42-49B、Fuji NSN3 探测器在铅/混凝土屏蔽配置中的裂变能谱中子源探测方面的性能比较","authors":"Yusuke Ota, R. Taleyarkhan","doi":"10.1115/1.4065853","DOIUrl":null,"url":null,"abstract":"\n This paper presents the results of neutron detection efficiency and dosimetry between a borated centrifugally tensioned metastable fluid detector (B-CTMFD) vs He-3 Ludlum-42-49B, and, the Fuji NSN3 conducted using a Cf-252 neutron source behind lead and concrete shielding. MCNP code simulations accounted for 3-D effects and derived cpm/mic.Sv/h factors. Ludlum and NSN3 offer fixed sensitivity, but CTMFD offered on-demand sensitivity by varying its Pneg state between 0.3-0.7 MPa. The B-CTMFD demonstrated sensitivity of up to ~22x greater than Ludlum and 5x greater than NSN3, for 0-15 cm Pb shielding, and 0-30 cm concrete shielding; it overcomes the 60% detection penalty inherent in the NB-CTMF-designed only to detect fast-energy neutrons - as described in the companion (Part-1) paper. Unlike the NB-CTMFD, which used 100% DFP (C5H2F10), the B-CTMFD requires the use of an azeotropic mixture of DFP, methanol, and tri-methyl borate (TMB - using natural boron) in 80:4:16 proportion. The B-CTMFD was about 6 times more sensitive than NB-CTMFD under the most heavily shielded condition and taken together, also offered 2-energy bin neutron spectroscopic enablement, together with 22-5x higher absolute efficiency- relative sensitivity compared with the non-spectroscopic Ludlum (He-3) and NSN3 (methane-nitrogen) based detectors. From an intrinsic efficiency standpoint, the B-CTMFD operating at Pneg = 0.7 MPa state, demonstrated even superior ~103x higher intrinsic efficiency over Ludlum and NSN3.","PeriodicalId":16756,"journal":{"name":"Journal of Nuclear Engineering and Radiation Science","volume":null,"pages":null},"PeriodicalIF":0.5000,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Performance of B-CTMFD Detector Vs Ludlum 42-49B, Fuji NSN3 Detectors for Fission Energy Spectrum Neutron Detection with the Source within Lead/concrete Shielded Configurations\",\"authors\":\"Yusuke Ota, R. Taleyarkhan\",\"doi\":\"10.1115/1.4065853\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"\\n This paper presents the results of neutron detection efficiency and dosimetry between a borated centrifugally tensioned metastable fluid detector (B-CTMFD) vs He-3 Ludlum-42-49B, and, the Fuji NSN3 conducted using a Cf-252 neutron source behind lead and concrete shielding. MCNP code simulations accounted for 3-D effects and derived cpm/mic.Sv/h factors. Ludlum and NSN3 offer fixed sensitivity, but CTMFD offered on-demand sensitivity by varying its Pneg state between 0.3-0.7 MPa. The B-CTMFD demonstrated sensitivity of up to ~22x greater than Ludlum and 5x greater than NSN3, for 0-15 cm Pb shielding, and 0-30 cm concrete shielding; it overcomes the 60% detection penalty inherent in the NB-CTMF-designed only to detect fast-energy neutrons - as described in the companion (Part-1) paper. Unlike the NB-CTMFD, which used 100% DFP (C5H2F10), the B-CTMFD requires the use of an azeotropic mixture of DFP, methanol, and tri-methyl borate (TMB - using natural boron) in 80:4:16 proportion. The B-CTMFD was about 6 times more sensitive than NB-CTMFD under the most heavily shielded condition and taken together, also offered 2-energy bin neutron spectroscopic enablement, together with 22-5x higher absolute efficiency- relative sensitivity compared with the non-spectroscopic Ludlum (He-3) and NSN3 (methane-nitrogen) based detectors. From an intrinsic efficiency standpoint, the B-CTMFD operating at Pneg = 0.7 MPa state, demonstrated even superior ~103x higher intrinsic efficiency over Ludlum and NSN3.\",\"PeriodicalId\":16756,\"journal\":{\"name\":\"Journal of Nuclear Engineering and Radiation Science\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.5000,\"publicationDate\":\"2024-07-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Nuclear Engineering and Radiation Science\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1115/1.4065853\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"NUCLEAR SCIENCE & TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Nuclear Engineering and Radiation Science","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1115/1.4065853","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"NUCLEAR SCIENCE & TECHNOLOGY","Score":null,"Total":0}
Performance of B-CTMFD Detector Vs Ludlum 42-49B, Fuji NSN3 Detectors for Fission Energy Spectrum Neutron Detection with the Source within Lead/concrete Shielded Configurations
This paper presents the results of neutron detection efficiency and dosimetry between a borated centrifugally tensioned metastable fluid detector (B-CTMFD) vs He-3 Ludlum-42-49B, and, the Fuji NSN3 conducted using a Cf-252 neutron source behind lead and concrete shielding. MCNP code simulations accounted for 3-D effects and derived cpm/mic.Sv/h factors. Ludlum and NSN3 offer fixed sensitivity, but CTMFD offered on-demand sensitivity by varying its Pneg state between 0.3-0.7 MPa. The B-CTMFD demonstrated sensitivity of up to ~22x greater than Ludlum and 5x greater than NSN3, for 0-15 cm Pb shielding, and 0-30 cm concrete shielding; it overcomes the 60% detection penalty inherent in the NB-CTMF-designed only to detect fast-energy neutrons - as described in the companion (Part-1) paper. Unlike the NB-CTMFD, which used 100% DFP (C5H2F10), the B-CTMFD requires the use of an azeotropic mixture of DFP, methanol, and tri-methyl borate (TMB - using natural boron) in 80:4:16 proportion. The B-CTMFD was about 6 times more sensitive than NB-CTMFD under the most heavily shielded condition and taken together, also offered 2-energy bin neutron spectroscopic enablement, together with 22-5x higher absolute efficiency- relative sensitivity compared with the non-spectroscopic Ludlum (He-3) and NSN3 (methane-nitrogen) based detectors. From an intrinsic efficiency standpoint, the B-CTMFD operating at Pneg = 0.7 MPa state, demonstrated even superior ~103x higher intrinsic efficiency over Ludlum and NSN3.
期刊介绍:
The Journal of Nuclear Engineering and Radiation Science is ASME’s latest title within the energy sector. The publication is for specialists in the nuclear/power engineering areas of industry, academia, and government.