Investigating the Current State and Future Trends of In Situ Gamma Spectrometry for Sedimentary Source Term Measurements in PWRs.
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| Title: | Investigating the Current State and Future Trends of In Situ Gamma Spectrometry for Sedimentary Source Term Measurements in PWRs. |
|---|---|
| Authors: | Li, Fuhai1,2 (AUTHOR) 530875205@qq.com, Liang, Weijiang3 (AUTHOR), Huang, Xinming3 (AUTHOR), Lin, Genxian1,2 (AUTHOR) |
| Source: | Nuclear Technology. May2026, Vol. 212 Issue 5, p1181-1192. 12p. |
| Abstract: | The measurement of sedimentary source terms (SSTs) in the primary circuit of a pressurized water reactor is important for radiological protection and collective radiation exposure control. In situ gamma spectrometry technology is the uniquely suitable nondestructive method for SST measurement, which gains strong interest from staff members of nuclear power plants. In this work, we provide a comprehensive introduction and discussion on in situ gamma spectrometry technology, including the basic principles, the development status, and the key technologies, with the aim to provide reference and guidance for future research. Specifically, the key technologies of in situ gamma spectrometry technology, including the detector, collimator, and efficiency calibration method, are analyzed and discussed. The detector is generally based on a high-purity germanium (HPGe) or CdZnTe (CZT) detector with the ability to recognize different nuclides from in situ gamma spectra. Variable apertures are recommended for the collimator adapting to different dose rates. The combined source-less efficiency calibration method, which combines Monte Carlo simulations and numerical integration, is the most suitable for in situ measurement of SSTs. The existing problems and future trends are also analyzed and discussed. CZT detectors with large-size crystals should be developed to increase the detection efficiency for high-energy gamma rays. The in situ measurement system should be operating automatically to reduce the workload and exposure of the plant staff. The accuracy of the calibration remains a problem in practical applications. Attentions should be paid to the accuracy of the field condition modeling. In addition to SSTs surveys during shutdown, in situ gamma spectrometry technology can be used for long-term online monitoring of SSTs, which is very helpful for the study of SST control. The problem is how to distinguish the SSTs from the source terms in the coolant, which is quite challenging and needs more study. [ABSTRACT FROM AUTHOR] |
| Copyright of Nuclear Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 193623620 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Investigating the Current State and Future Trends of In Situ Gamma Spectrometry for Sedimentary Source Term Measurements in PWRs. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Li%2C+Fuhai%22">Li, Fuhai</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> 530875205@qq.com</i><br /><searchLink fieldCode="AR" term="%22Liang%2C+Weijiang%22">Liang, Weijiang</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Huang%2C+Xinming%22">Huang, Xinming</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lin%2C+Genxian%22">Lin, Genxian</searchLink><relatesTo>1,2</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nuclear+Technology%22">Nuclear Technology</searchLink>. May2026, Vol. 212 Issue 5, p1181-1192. 12p. – Name: Abstract Label: Abstract Group: Ab Data: The measurement of sedimentary source terms (SSTs) in the primary circuit of a pressurized water reactor is important for radiological protection and collective radiation exposure control. In situ gamma spectrometry technology is the uniquely suitable nondestructive method for SST measurement, which gains strong interest from staff members of nuclear power plants. In this work, we provide a comprehensive introduction and discussion on in situ gamma spectrometry technology, including the basic principles, the development status, and the key technologies, with the aim to provide reference and guidance for future research. Specifically, the key technologies of in situ gamma spectrometry technology, including the detector, collimator, and efficiency calibration method, are analyzed and discussed. The detector is generally based on a high-purity germanium (HPGe) or CdZnTe (CZT) detector with the ability to recognize different nuclides from in situ gamma spectra. Variable apertures are recommended for the collimator adapting to different dose rates. The combined source-less efficiency calibration method, which combines Monte Carlo simulations and numerical integration, is the most suitable for in situ measurement of SSTs. The existing problems and future trends are also analyzed and discussed. CZT detectors with large-size crystals should be developed to increase the detection efficiency for high-energy gamma rays. The in situ measurement system should be operating automatically to reduce the workload and exposure of the plant staff. The accuracy of the calibration remains a problem in practical applications. Attentions should be paid to the accuracy of the field condition modeling. In addition to SSTs surveys during shutdown, in situ gamma spectrometry technology can be used for long-term online monitoring of SSTs, which is very helpful for the study of SST control. The problem is how to distinguish the SSTs from the source terms in the coolant, which is quite challenging and needs more study. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nuclear Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1080/00295450.2025.2481660 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 12 StartPage: 1181 Titles: – TitleFull: Investigating the Current State and Future Trends of In Situ Gamma Spectrometry for Sedimentary Source Term Measurements in PWRs. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Li, Fuhai – PersonEntity: Name: NameFull: Liang, Weijiang – PersonEntity: Name: NameFull: Huang, Xinming – PersonEntity: Name: NameFull: Lin, Genxian IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 00295450 Numbering: – Type: volume Value: 212 – Type: issue Value: 5 Titles: – TitleFull: Nuclear Technology Type: main |
| ResultId | 1 |
