Applications of HPGe-detected high energy gamma rays toward quantifying neutron emission rates and 234U enrichment in UF6 cylinders
This study presents a 234U enrichment meter that uses high energy gamma and neutron count rate as measured by a portable, high-purity germanium gamma ray detector. Twenty-one 30B cylinders containing UF6 of varying origin were analyzed with an HPGe detector for high-energy gamma ray and neutron coun...
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| Veröffentlicht in: | Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2020-08, Vol.972 (C), p.163912, Article 163912 |
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| container_title | Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment |
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| creator | Greaney, Allison T. Smith, Susan K. Venkataraman, Ramkumar Richards, Jason M. Fugate, Glenn A. |
| description | This study presents a 234U enrichment meter that uses high energy gamma and neutron count rate as measured by a portable, high-purity germanium gamma ray detector. Twenty-one 30B cylinders containing UF6 of varying origin were analyzed with an HPGe detector for high-energy gamma ray and neutron counts. Excellent correlations (R2≥ 0.95) between various regions of ≥3.0 MeV gamma rays, neutron count rate, and uranium enrichment were found. These neutron and high-energy gamma data are used to create calibration-dependent enrichment meters for 234U. The 234U enrichment calculated from the neutron count rate and 4 – 6 MeV gamma count rate is more accurate than methods that rely on the 120.9 keV peak which is strongly attenuated inside commercial sized UF6 cylinders. These neutron and high-energy gamma enrichment calculators can also be used to determine a 235U enrichment, assuming mass-based enrichment from natural uranium, but the results are not as accurate as the traditional 185.7 keV peak enrichment meter. |
| doi_str_mv | 10.1016/j.nima.2020.163912 |
| format | Article |
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| identifier | ISSN: 0168-9002 |
| ispartof | Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 2020-08, Vol.972 (C), p.163912, Article 163912 |
| issn | 0168-9002 1872-9576 |
| language | eng |
| recordid | cdi_osti_scitechconnect_1631249 |
| source | Elsevier ScienceDirect Journals Complete - AutoHoldings |
| subjects | Enrichment High energy gamma rays INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY NDA Neutrons Uranium |
| title | Applications of HPGe-detected high energy gamma rays toward quantifying neutron emission rates and 234U enrichment in UF6 cylinders |
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