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This division promotes the development and timely introduction of fusion energy as a sustainable energy source with favorable economic, environmental, and safety attributes. The division cooperates with other organizations on common issues of multidisciplinary fusion science and technology, conducts professional meetings, and disseminates technical information in support of these goals. Members focus on the assessment and resolution of critical developmental issues for practical fusion energy applications.
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NEA issues call to action in report on nuclear cost reductions
A new report from the Paris-based OECD Nuclear Energy Agency declares that nuclear power is needed for countries to meet their Paris Agreement decarbonization and energy security policy goals, but that governmental support for a rapid reduction in the cost of new nuclear capacity through the creation of certain policy frameworks is likely necessary.
Chunbo (Sam) Zhang, Alice Ying, Mohamed A. Abdou
Fusion Science and Technology | Volume 68 | Number 3 | October 2015 | Pages 612-617
Technical Paper | Proceedings of TOFE-2014 | dx.doi.org/10.13182/FST14-935
Articles are hosted by Taylor and Francis Online.
This work has developed FEM models of ceramic breeder pebble beds and applied them to two categories of blanket design (edge-on and layer configurations) to predict the thermomechanical behavior of a pebble bed under ITER pulsed operating condition. To explore the pebble bed/structural wall separation phenomenon, a thermomechanical contact is considered using contact elements meshed along pebble/structure interface. The pebble bed/wall dynamic contact/separation process has been simulated, and the gap distance distribution and variation have been analyzed and presented. Pebble bed/wall separation occurs during the plasma-off period and varies with both location and time. A maximal radial gap of 0.64mm is found for an edge-on configuration after the 1st ITER cycle within the range of studied parameters. For the layer configuration, a poloidal gap of 1.99mm, larger than the pebble diameter, is found. The generated gap can cause the even large rearrangement of pebbles and result in a disturbed packing during further cycling. Consequently, a design solution is suggested to mitigate this situation.