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Detection of Gadolinium in Surrogate Nuclear Fuel Debris Using Fiber-Optic Laser-Induced Breakdown Spectroscopy under Gamma Irradiation. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10248985] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Fiber-optic laser-induced breakdown spectroscopy (FO-LIBS) was applied to a qualitative and quantitative analysis of gadolinium (Gd) in mixed oxide samples, simulating nuclear fuel debris in the damaged reactors of the Fukushima Daiichi Nuclear Power Station. The surrogate debris was prepared from mixed oxide materials containing Gd2O3, with varying Gd concentrations. The emission spectra of the surrogate debris show that the optical emission lines at 501.5 nm and 510.3 nm are suitable for Gd detection in the nuclear fuel debris. LIBS measurements were further performed under gamma irradiation (0–10 kGy/h), resulting in a decrease in spectral intensities due to radiation-induced damage to the optical fiber. For quantification of Gd, robust calibration curves against gamma irradiation were established from the intensity ratio of Gd (501.5 nm)/Ce (474.5 nm) emission lines, yielding the limits of detection for Gd in the range of 0.03–0.08 wt%. These results demonstrate that FO-LIBS is a potential tool for in situ and remote analysis of nuclear fuel debris.
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Ikeuchi H, Yano K, Washiya T. Chemical forms of uranium evaluated by thermodynamic calculation associated with distribution of core materials in the damaged reactor pressure vessel. J NUCL SCI TECHNOL 2020. [DOI: 10.1080/00223131.2020.1720844] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Hirotomo Ikeuchi
- Collaborative Laboratories for Advanced Decommissioning Science, Japan Atomic Energy Agency, Ibaraki, Japan
| | - Kimihiko Yano
- Collaborative Laboratories for Advanced Decommissioning Science, Japan Atomic Energy Agency, Ibaraki, Japan
| | - Tadahiro Washiya
- Collaborative Laboratories for Advanced Decommissioning Science, Japan Atomic Energy Agency, Ibaraki, Japan
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Separation of uranium from solid (U, Pu, Ag) oxide analytical waste: effect of batch size and nitric acid molarity. J Radioanal Nucl Chem 2016. [DOI: 10.1007/s10967-016-4711-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Sato T, Shibata H, Hayashi H, Takano M, Kurata M. Chlorination of UO 2and (U,Zr)O 2solid solution using MoCl 5. J NUCL SCI TECHNOL 2015. [DOI: 10.1080/00223131.2015.1070110] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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