可搬型高エネルギーX線源を使用した2色X線による燃料デブリ成分解析の研究
Fukushima Nuclear Fuel Debris Component Analysis by Spectral CT with Portable High Energy X-ray Source
著者:
小沢 壱生 福岡 潤也 三津谷 有貴 土橋 克広 上坂 充 島添 健次 高橋 浩之 阿部 弘亨 （東京大） 芝 知宙 （JAEA）
発刊日:
公開日:
Fukushima DecomissionNuclear Fuel DebrisPhoton Counting CTPortable High Energy X-ray SourceSpectral CT
概要
In order to decommission TEPCO Fukushima Daiichi nuclear power plant, the removal of fuel nuclear debris is planned from 2021. It is demanded to grasp nuclear material element contents of the debris remaining inside the accident reactors for the effective and safe removal. Our research team aims to do the on-site analysis of the extracted debris by the Spectral X-ray CT method with the portable X-band (9.3 GHz) 950 keV/3.95 MeV electron linac X-ray sources and GAGG X-ray detector. It is expected to realize the atomic number evaluation. In this paper, the resolution of measurement with respect to atomic number, volume and weight are to be described and discussed. We have also performed a preliminary experiment of energy-selected X-ray imaging with the system and could have successfully obtained different transmission images by changing X-ray energy ranges.
