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Report No.
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Development of laser remote analysis for nuclear fuel materials under severe environments

Wakaida, Ikuo  ; Akaoka, Katsuaki ; Miyabe, Masabumi   ; Oba, Hironori  ; Saeki, Morihisa; Ito, Chikara   ; Oba, Masaki ; Kato, Masaaki

For the decommissioning of "Fukushima Daiichi Nuclear Power Plant", development of onsite and in-situ remote diagnostic/analysis techniques under high radioactive environments will be strongly required. For the basic R&D on the decommissioning, Japan Atomic Energy Agency has opened the new research center "Collaborative Laboratories for Advanced Decommissioning Science". The concept of probing by light and diagnostic by light will be one of the powerful choices to accomplish these requirements. So, we are now developing the remote diagnostic technique for onsite, in-situ monitoring of nuclear debris. Optical Fiber based LIBS probe made by radiation resistant optical fiber was constructed, and we have successfully observed some specific spectra from the simulated sample of molten debris made by sintered oxide of Zr and U under the severe environment such as radioactive condition of 10 kGy/h and after total dose of 2 MGy.

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