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Fusion Science and Technology
Latest News
Take steps on SNF and HLW disposal
Matt Bowen
With a new administration and Congress, it is time once again to ponder what will happen—if anything—on U.S. spent nuclear fuel and high-level waste management policy over the next few years. One element of the forthcoming discussion seems clear: The executive and legislative branches are eager to talk about recycling commercial SNF. Whatever the merits of doing so, it does not obviate the need for one or more facilities for disposal of remaining long-lived radionuclides. For that reason, making progress on U.S. disposal capabilities remains urgent, lest the associated radionuclide inventories simply be left for future generations to deal with.
In March, Rick Perry, who was secretary of energy during President Trump’s first administration, observed that during his tenure at the Department of Energy it became clear to him that any plan to move SNF “required some practical consent of the receiving state and local community.”1
J. M. García-Regaña, F. Castejón, A. Cappa
Fusion Science and Technology | Volume 55 | Number 2 | February 2009 | Pages 219-226
Technical Paper | Electron Cyclotron Emission and Electron Cyclotron Resonance Heating | doi.org/10.13182/FST09-A4074
Articles are hosted by Taylor and Francis Online.
Electron Bernstein waves (EBWs) have been confirmed as a suitable choice for plasma heating and current drive generation (electron Bernstein current drive) at densities where the O and X modes find cutoff values. In the present work, an estimation of the efficiency function of current generated for a relativistic distribution function is presented. The arbitrary large values of the refractive index, due to the EBW propagation properties, have also made necessary the expansion of our calculation up to any Larmor radius order. Particle trapping has been included considering the Okhawa effect, and the fractions of power absorbed by trapped and circulating particles separately have been estimated. Future work toward implementation of this method to the ray-tracing code used for realistic TJ-II ray trajectories (TRUBA) is also discussed.
