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Nuclear Science and Engineering
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.
V. Novak, S. I. Abdel-Khalik, D. L. Sadowski, K. G. Schoonover
Fusion Science and Technology | Volume 52 | Number 3 | October 2007 | Pages 483-488
Technical Paper | The Technology of Fusion Energy - Inertial Fusion Technology: Targets and Chambers | dx.doi.org/10.13182/FST07-A1535
Articles are hosted by Taylor and Francis Online.
An experimental investigation has been conducted to examine nozzle-generated, gas/liquid mist cooling with ultra-thin, evaporating liquid films as a cooling mechanism for the Electra KrF laser dual-foil hibachi structure. Experiments have been conducted within the Electra KrF laser using a prototypical dual-foil hibachi structure cooled with either forced convection air or an air/water mist. Test runs up to 10,000 shots at 5 Hz have been successfully performed. Mist cooling results for a moderate air velocity of 15 m/s and a water mass fraction of 15% show that the hibachi foils can be maintained below 150 °C when operated at full power pulsed conditions. The data indicate that mist cooling can decrease foil cooling time constant by nearly an order of magnitude compared to forced convection using air only.