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Oral presentation

Application of laser-induced breakdown spectroscopy to zirconium in aqueous solution

Ruas, A.; Oba, Hironori; Akaoka, Katsuaki; Wakaida, Ikuo

no journal, , 

Oral presentation

Research and development of Laser Induced Breakdown Spectroscopy in Collaborative Laboratories for Advanced Decommissioning Science

Wakaida, Ikuo; Oba, Hironori; Miyabe, Masabumi; Akaoka, Katsuaki; Oba, Masaki; Kato, Masaaki; Ruas, A.

no journal, , 

no abstracts in English

Oral presentation

Development of quick and remote analysis for severe accident reactor, 3; characteristics of microwave assisted LIBS

Oba, Masaki; Akaoka, Katsuaki; Miyabe, Masabumi; Wakaida, Ikuo; Oba, Hironori; Ruas, A.

no journal, , 

To enhance the emission intensity of laser plasma, the characteristics of microwave assisted LIBS (MW LIBS) were measured. Using gadorinium oxide as test sample, the emission strength in the case of MW LIBS was 4 times higher than that in the case of laser pulse only.

Oral presentation

Development of quick and remote analysis for severe accident reactor, 1; Laser remote analysis under severe environment

Wakaida, Ikuo; Oba, Hironori; Akaoka, Katsuaki; Oba, Masaki; Ruas, A.; Saeki, Morihisa; Miyabe, Masabumi; Ikeda, Yuji*; Sakka, Tetsuo*

no journal, , 

no abstracts in English

Oral presentation

Oral presentation

Challenging in LIBS technology for decommissioning of damaged reactor "Fukushima Daiichi Nuclear Power Station"

Wakaida, Ikuo; Oba, Hironori; Oba, Masaki; Matsumoto, Ayumu; Ruas, A.; Toshimitsu, Masaaki; Akaoka, Katsuaki; Miyabe, Masabumi

no journal, , 

For the decommissioning of "Fukushima Daiichi Nuclear Power Station", Optical Fiber based LIBS probe is constructed, and under water condition, we have successfully observed some specific spectra from the simulated sample of molten debris made by sintered oxide of Zr and U. For the use of more longer optical fiber, long-pulse laser with the pulse duration about 100 ns will be introduced to compensate the delivery power loss and/or to enhance the emission signal to be about several times by the time integration of emission signal. As for the signal enhancement technique, microwave assisted LIBS technique coupled with simple antenna for the combination use with fiber LIBS will be under developing, and about ten times enhancement was observed under the atmosphere condition. For the application to the liquid phase sample, especially for the analysis of the polluted cooling water, the thin-sheet liquid jets will be also introduced as the convenience and high sensitive monitoring for dissolved elements of nuclear fuel debris.

Oral presentation

Application of laser-induced breakdown spectroscopy to zirconium in aqueous solution

Ruas, A.; Matsumoto, Ayumu; Oba, Hironori; Akaoka, Katsuaki; Wakaida, Ikuo

no journal, , 

Oral presentation

Development of quick and remote analysis for severe accident reactor, 3-2; Liquid-LIBS studies for the Fukushima Daiichi decommissioning

Ruas, A.; Matsumoto, Ayumu; Oba, Hironori; Akaoka, Katsuaki; Wakaida, Ikuo

no journal, , 

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