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Latest News
Commercial nuclear innovation "new space" age
In early 2006, a start-up company launched a small rocket from a tiny island in the Pacific. It exploded, showering the island with debris. A year later, a second launch attempt sent a rocket to space but failed to make orbit, burning up in the atmosphere. Another year brought a third attempt—and a third failure. The following month, in September 2008, the company used the last of its funds to launch a fourth rocket. It reached orbit, making history as the first privately funded liquid-fueled rocket to do so.
K. Liger, P. Trabuc, X. Lefebvre, M. Troulay, C. Perrais
Fusion Science and Technology | Volume 67 | Number 2 | March 2015 | Pages 455-458
Proceedings of TRITIUM 2013 | doi.org/10.13182/FST14-T53
Articles are hosted by Taylor and Francis Online.
In the framework of the development of fusion thermonuclear reactors, tritiated solid waste is foreseen and will have to be managed. In France, the long-term management of all radioactive waste is under the responsibility of the national waste management agency (ANDRA), which sets out strict specifications on waste drums before their acceptances in disposal. Among all these specifications, the related ones for tritium concern limitations in terms of activity and tritium degassing. The latter is the subject of research developments to improve its control. The degassing tritium can be under the form of tritiated hydrogen, tritiated water and, in some specific cases, negligible amount of tritiated volatile organic compound. Hence, considering the major forms of degassing tritium, CEA has developed a mixed-compound dedicated to tritium trapping in drums. Based on several experiments, the foreseen mixed compound is composed of MnO2, Ag2O, Pt and molecular sieve, the three first species having the ability to convert tritiated hydrogen into tritiated water and the last one acting as a trap for tritiated water. This paper aims at describing the formulation of the mixed solids compound and presenting the first results of experimental lab-scale tests performed on purely tritiated waste confined in a small reactor. It is observed that the rate of tritium degassing from the reactor is reduced drastically during several months by means of the presence of the mixed compound.