Performance improvement of gamma ray spectrum logging tool based on LaBr3(Ce) scintillation crystals
BackgroundThe main ore-bearing rock of the Husab Uranium Mine in Namibia, southern Africa, is white granite, and the radioactive element thorium content in the ore is high, which has a greater impact on the γ ray logging results.PurposeThis study aims to solve the problem of thorium's interfere...
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| Format: | Article |
| Language: | zho |
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Science Press
2022-07-01
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| Series: | He jishu |
| Subjects: | |
| Online Access: | https://www.hjs.sinap.ac.cn/thesisDetails#10.11889/j.0253-3219.2022.hjs.45.070402&lang=zh |
| _version_ | 1811169596474916864 |
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| author | HAO Jinlong DONG Wenming CHEN Ning DENG Hongze |
| author_facet | HAO Jinlong DONG Wenming CHEN Ning DENG Hongze |
| author_sort | HAO Jinlong |
| collection | DOAJ |
| description | BackgroundThe main ore-bearing rock of the Husab Uranium Mine in Namibia, southern Africa, is white granite, and the radioactive element thorium content in the ore is high, which has a greater impact on the γ ray logging results.PurposeThis study aims to solve the problem of thorium's interference on the γ ray logging results by developing a γ ray spectrum logging instrument.MethodsA high-resolution LaBr3(Ce) scintillation detector was employed to build a new type of γ ray spectrum logging tool. Combined with cross-segment method of γ ray spectrum and techniques for separating the γ ray spectrum, the counting rates of thorium, uranium and potassium nuclides were greatly improved, so did the measuring range of the tool and logging speed. Experiment and calibration tests of this logging instrument were conducted on control holes, blast holes, national standard uranium calibration pit, etc., to verify its range, speed applicability, stability, repeatability, etc.ResultsTests results show that the γ ray spectrum logging achieves upper limit of uranium content measurement of 5.0% eU, and the logging speed of 0.067 m·s-1, satisfying the rapid quantitative measurement of uranium grades in the blast holes of the Husab Mine and accurately estimated the amount of uranium with superior measuring accuracy to the γ ray logging method.ConclusionsThe γ ray logging tool of this study reaches specification requirements of γ ray logging. It can effectively distinguish thorium, uranium and potassium nuclides, realizing the quantitative measurement of uranium content. |
| first_indexed | 2024-04-10T16:45:01Z |
| format | Article |
| id | doaj.art-01e1a4fa761d453486179054b5191ef9 |
| institution | Directory Open Access Journal |
| issn | 0253-3219 |
| language | zho |
| last_indexed | 2024-04-10T16:45:01Z |
| publishDate | 2022-07-01 |
| publisher | Science Press |
| record_format | Article |
| series | He jishu |
| spelling | doaj.art-01e1a4fa761d453486179054b5191ef92023-02-08T00:55:11ZzhoScience PressHe jishu0253-32192022-07-0145707040207040210.11889/j.0253-3219.2022.hjs.45.0704020253-3219（2022）07-0057-08Performance improvement of gamma ray spectrum logging tool based on LaBr3(Ce) scintillation crystalsHAO Jinlong0DONG Wenming1CHEN Ning2DENG Hongze3China General Nuclear Power Group Uranium Resources Co., Ltd, Beijing 100029, ChinaChina General Nuclear Power Group Uranium Resources Co., Ltd, Beijing 100029, ChinaChina General Nuclear Power Group Uranium Resources Co., Ltd, Beijing 100029, ChinaChina General Nuclear Power Group Uranium Resources Co., Ltd, Beijing 100029, ChinaBackgroundThe main ore-bearing rock of the Husab Uranium Mine in Namibia, southern Africa, is white granite, and the radioactive element thorium content in the ore is high, which has a greater impact on the γ ray logging results.PurposeThis study aims to solve the problem of thorium's interference on the γ ray logging results by developing a γ ray spectrum logging instrument.MethodsA high-resolution LaBr3(Ce) scintillation detector was employed to build a new type of γ ray spectrum logging tool. Combined with cross-segment method of γ ray spectrum and techniques for separating the γ ray spectrum, the counting rates of thorium, uranium and potassium nuclides were greatly improved, so did the measuring range of the tool and logging speed. Experiment and calibration tests of this logging instrument were conducted on control holes, blast holes, national standard uranium calibration pit, etc., to verify its range, speed applicability, stability, repeatability, etc.ResultsTests results show that the γ ray spectrum logging achieves upper limit of uranium content measurement of 5.0% eU, and the logging speed of 0.067 m·s-1, satisfying the rapid quantitative measurement of uranium grades in the blast holes of the Husab Mine and accurately estimated the amount of uranium with superior measuring accuracy to the γ ray logging method.ConclusionsThe γ ray logging tool of this study reaches specification requirements of γ ray logging. It can effectively distinguish thorium, uranium and potassium nuclides, realizing the quantitative measurement of uranium content.https://www.hjs.sinap.ac.cn/thesisDetails#10.11889/j.0253-3219.2022.hjs.45.070402&lang=zhγ ray spectrum logginglabr3(ce) scintillation crystals detectorcross-segment method of γ ray spectrumtechniques for separating the γ ray spectrumuranium content |
| spellingShingle | HAO Jinlong DONG Wenming CHEN Ning DENG Hongze Performance improvement of gamma ray spectrum logging tool based on LaBr3(Ce) scintillation crystals He jishu γ ray spectrum logging labr3(ce) scintillation crystals detector cross-segment method of γ ray spectrum techniques for separating the γ ray spectrum uranium content |
| title | Performance improvement of gamma ray spectrum logging tool based on LaBr3(Ce) scintillation crystals |
| title_full | Performance improvement of gamma ray spectrum logging tool based on LaBr3(Ce) scintillation crystals |
| title_fullStr | Performance improvement of gamma ray spectrum logging tool based on LaBr3(Ce) scintillation crystals |
| title_full_unstemmed | Performance improvement of gamma ray spectrum logging tool based on LaBr3(Ce) scintillation crystals |
| title_short | Performance improvement of gamma ray spectrum logging tool based on LaBr3(Ce) scintillation crystals |
| title_sort | performance improvement of gamma ray spectrum logging tool based on labr3 ce scintillation crystals |
| topic | γ ray spectrum logging labr3(ce) scintillation crystals detector cross-segment method of γ ray spectrum techniques for separating the γ ray spectrum uranium content |
| url | https://www.hjs.sinap.ac.cn/thesisDetails#10.11889/j.0253-3219.2022.hjs.45.070402&lang=zh |
| work_keys_str_mv | AT haojinlong performanceimprovementofgammarayspectrumloggingtoolbasedonlabr3cescintillationcrystals AT dongwenming performanceimprovementofgammarayspectrumloggingtoolbasedonlabr3cescintillationcrystals AT chenning performanceimprovementofgammarayspectrumloggingtoolbasedonlabr3cescintillationcrystals AT denghongze performanceimprovementofgammarayspectrumloggingtoolbasedonlabr3cescintillationcrystals |