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The Education, Training & Workforce Development Division provides communication among the academic, industrial, and governmental communities through the exchange of views and information on matters related to education, training and workforce development in nuclear and radiological science, engineering, and technology. Industry leaders, education and training professionals, and interested students work together through Society-sponsored meetings and publications, to enrich their professional development, to educate the general public, and to advance nuclear and radiological science and engineering.
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April 8–10, 2021
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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.
D. Demange et al.
Fusion Science and Technology | Volume 48 | Number 1 | July-August 2005 | Pages 182-187
Technical Paper | Tritium Science and Technology - Decontamination and Waste | dx.doi.org/10.13182/FST05-A908
Articles are hosted by Taylor and Francis Online.
This work deals with an indirect and non destructive measurement of tritium in solids. Instead of measuring tritium, we propose to measure the production rate of the decay product: 3He.The amount of tritium enclosed inside a waste drum can be determined with an adapted 3He ingrowth method that takes into account the leak rate of the drum. The model leads to different ways to quantify tritium in the drum. It is confirmed using reference drums that measuring the 3He leak by confining the drum during its equilibrium state gives the same result as sampling the drum atmosphere at the beginning of the storage. For each method, the appropriate apparatus, experimental procedures and calculation of tritium activity from mass spectrometric 3He measurements are detailed. Performances of these techniques are studied and discussed.In addition, we describe a novel and fully automated apparatus based on the confinement method that makes it possible to achieve a close tritium inventory of all the waste drums stored or produced at CEA Valduc.