@misc{oai:repo.qst.go.jp:00072987,
 author = {大場, 弘則 and 田村, 浩司 and 佐伯, 盛久 and 赤岡, 克昭 and 若井田, 育夫 and 大場 弘則 and 田村 浩司 and 佐伯 盛久},
 month = {Oct},
 note = {For a nuclear power plant decommissioning process, there are some probes related inspection systems to be considered to make the process faster and easier, more secure. In the inspection of the damaged reactor core in TEPCO Fukushima Daiichi nuclear power plants, combining the imaging observation and the laser induced breakdown spectroscopy (LIBS) analysis provides more rich information, because it is difficult to distinguish the kind of material of the debris only by imaging. Information concerning the kind of material helps us to select the cutting technique of the debris during the decommissioning process. The major components of the debris material are assumed to be uranium oxide (UO2, fuel core), zirconium alloy (Zry, fuel cladding) and iron (Fe, construction material). And also, the nuclear fuel includes a small amount of Gd2O3 as a burnable poison for all fuel weight for neutron control. We would understand the burn-up of the debris and the critical control status if we can analyze isotope ratios of Gd. Thus, distinguishing among these materials is essential in any LIBS analysis of the debris. We have proposed a fiber-optic LIBS, and confirmed that the light transmission of the employed fiber optics is not degraded by the radiation exposure in near infrared region, which is used for the laser and emission transmission. However, it is unknown how the LIBS emission is observed in an environment of high-dose radiation. In the present work, we investigated laser-produced plasma in the fiber-optic LIBS of simulated nuclear fuel debris (Ce(:surrogate of U)-Zr-Fe oxides) including Gd oxide under high radiation dose rates of 60Co gamma ray. The results showed that no dependence of calibration-slope for Gd concentration on radiation dose rate., SCIX2018/LIBS2018},
 title = {Fiber-optic LIBS detection of Gd in mixed oxide under radiation environment},
 year = {2018}
}