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Fusion Science and Technology
Fukiushima Daiichi: 10 years on
The Fukushima Daiichi site before the accident. All images are provided courtesy of TEPCO unless noted otherwise.
It was a rather normal day back on March 11, 2011, at the Fukushima Daiichi nuclear plant before 2:45 p.m. That was the time when the Great Tohoku Earthquake struck, followed by a massive tsunami that caused three reactor meltdowns and forever changed the nuclear power industry in Japan and worldwide. Now, 10 years later, much has been learned and done to improve nuclear safety, and despite many challenges, significant progress is being made to decontaminate and defuel the extensively damaged Fukushima Daiichi reactor site. This is a summary of what happened, progress to date, current situation, and the outlook for the future there.
Satoru Yoshimura, Satoshi Sugimoto, Shigefumi Okada (19P60)
Fusion Science and Technology | Volume 51 | Number 2 | February 2007 | Pages 376-378
Technical Paper | Open Magnetic Systems for Plasma Confinement | dx.doi.org/10.13182/FST07-A1407
Articles are hosted by Taylor and Francis Online.
A measurement system for the investigation of the translation of the field reversed configuration (FRC) plasma using computer tomography (CT) data at two different cross-sections was established. Two sets of CT devices were installed at the upstream and downstream sides of the confinement chamber of the FIX machine. Each CT device was composed of three arrays of detectors sensitive to the near-infrared radiation. The Fourier-Bessel expansion technique was employed to reconstruct the two-dimensional distributions of the light emissivity of the FRC plasma. After the completion of the translation, the intensity of emission decreased significantly, probably because the density and the temperature of the plasma were decreased due to the plasma expansion induced by the translation.