Study of a collimation method as a nondestructive diagnostic diagnostic technique by PGNAA for salt distribution in concrete structures at RANS
To meet strong demand for realizing an effective tool to diagnose salt distribution in concrete infrastructures, we have started a development of a new technique using a prompt gamma neutron activation analysis (PGNAA) at the RIKEN accelerator-driven compact neutron source (RANS). So far, by applyin...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2020-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2020/07/epjconf_ucans82020_05007.pdf |
| _version_ | 1818655937841332224 |
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| author | Wakabayashi Yasuo Hashiguchi Takao Yoshimura Yuichi Mizuta Maki Ikeda Yujiro Otake Yoshie |
| author_facet | Wakabayashi Yasuo Hashiguchi Takao Yoshimura Yuichi Mizuta Maki Ikeda Yujiro Otake Yoshie |
| author_sort | Wakabayashi Yasuo |
| collection | DOAJ |
| description | To meet strong demand for realizing an effective tool to diagnose salt distribution in concrete infrastructures, we have started a development of a new technique using a prompt gamma neutron activation analysis (PGNAA) at the RIKEN accelerator-driven compact neutron source (RANS). So far, by applying PGNAA we have experimentally confirmed that neutrons from RANS can detect small enough amounts of chlorine within the marginal concentration of around 1.2 kg/m3 to involve steel corrosion. In this study, we have proposed two methods to derive the salt depth profile which is critical information of steel corrosion start. The first one utilizes a difference in the intensity ratio of two different γ-ray energies of interest, which is depending on the depth where the neutron capture reaction arises inside the concrete. The second is called the collimator method that measure γ-rays coming through a collimator around detector. Detection of γ-ray associated with 35Cl coming from the assembly of concrete has been also simulated with conditions of neutrons from RANS and a collimator. The feasibility of the method was discussed. |
| first_indexed | 2024-12-17T03:17:38Z |
| format | Article |
| id | doaj.art-efb1c56410fc45059090a06017c7ff58 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-17T03:17:38Z |
| publishDate | 2020-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-efb1c56410fc45059090a06017c7ff582022-12-21T22:05:37ZengEDP SciencesEPJ Web of Conferences2100-014X2020-01-012310500710.1051/epjconf/202023105007epjconf_ucans82020_05007Study of a collimation method as a nondestructive diagnostic diagnostic technique by PGNAA for salt distribution in concrete structures at RANSWakabayashi Yasuo0Hashiguchi Takao1Yoshimura YuichiMizuta Maki2Ikeda YujiroOtake Yoshie3RIKEN Center for Advanced Photonics, Neutron Beam Technology TeamRIKEN Center for Advanced Photonics, Neutron Beam Technology TeamRIKEN Center for Advanced Photonics, Neutron Beam Technology TeamRIKEN Center for Advanced Photonics, Neutron Beam Technology TeamTo meet strong demand for realizing an effective tool to diagnose salt distribution in concrete infrastructures, we have started a development of a new technique using a prompt gamma neutron activation analysis (PGNAA) at the RIKEN accelerator-driven compact neutron source (RANS). So far, by applying PGNAA we have experimentally confirmed that neutrons from RANS can detect small enough amounts of chlorine within the marginal concentration of around 1.2 kg/m3 to involve steel corrosion. In this study, we have proposed two methods to derive the salt depth profile which is critical information of steel corrosion start. The first one utilizes a difference in the intensity ratio of two different γ-ray energies of interest, which is depending on the depth where the neutron capture reaction arises inside the concrete. The second is called the collimator method that measure γ-rays coming through a collimator around detector. Detection of γ-ray associated with 35Cl coming from the assembly of concrete has been also simulated with conditions of neutrons from RANS and a collimator. The feasibility of the method was discussed.https://www.epj-conferences.org/articles/epjconf/pdf/2020/07/epjconf_ucans82020_05007.pdf |
| spellingShingle | Wakabayashi Yasuo Hashiguchi Takao Yoshimura Yuichi Mizuta Maki Ikeda Yujiro Otake Yoshie Study of a collimation method as a nondestructive diagnostic diagnostic technique by PGNAA for salt distribution in concrete structures at RANS EPJ Web of Conferences |
| title | Study of a collimation method as a nondestructive diagnostic diagnostic technique by PGNAA for salt distribution in concrete structures at RANS |
| title_full | Study of a collimation method as a nondestructive diagnostic diagnostic technique by PGNAA for salt distribution in concrete structures at RANS |
| title_fullStr | Study of a collimation method as a nondestructive diagnostic diagnostic technique by PGNAA for salt distribution in concrete structures at RANS |
| title_full_unstemmed | Study of a collimation method as a nondestructive diagnostic diagnostic technique by PGNAA for salt distribution in concrete structures at RANS |
| title_short | Study of a collimation method as a nondestructive diagnostic diagnostic technique by PGNAA for salt distribution in concrete structures at RANS |
| title_sort | study of a collimation method as a nondestructive diagnostic diagnostic technique by pgnaa for salt distribution in concrete structures at rans |
| url | https://www.epj-conferences.org/articles/epjconf/pdf/2020/07/epjconf_ucans82020_05007.pdf |
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