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The mission of the Decommissioning and Environmental Sciences (DES) Division is to promote the development and use of those skills and technologies associated with the use of nuclear energy and the optimal management and stewardship of the environment, sustainable development, decommissioning, remediation, reutilization, and long-term surveillance and maintenance of nuclear-related installations, and sites. The target audience for this effort is the membership of the Division, the Society, and the public at large.
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Latest News
First astatine-labeled compound shipped in the U.S.
The Department of Energy’s National Isotope Development Center (NIDC) on March 31 announced the successful long-distance shipment in the United States of a biologically active compound labeled with the medical radioisotope astatine-211 (At-211). Because previous shipments have included only the “bare” isotope, the NIDC has described the development as “unleashing medical innovation.”
Javier Martinez, Elia Merzari (ANL), Michael Acton, Emilio Baglietto (MIT)
Proceedings | Advances in Thermal Hydraulics 2018 | Orlando, FL, November 11-15, 2018 | Pages 644-658
The turbulent flow inside a differentially heated cavity at a Rayleigh number of approximately 109 has been studied through a fully resolved Direct Numerical Simulation using the high-order Spectral Element Method code Nek5000. The case chosen for the present paper includes two physical phenomena: the natural recirculation itself, and the flow inside a curved channel that has been added to bottom right corner of the cavity. Solutions are presented as reference for the validation of models when the two physical phenomena are superposed. Simulations have been carried out either using the Boussinesq approximation or a low-Mach compressible formulation. Significant discrepancies between the two methods inform of the extreme necessary caution to consider when using the Boussinesq approximation in the limits of its applicability. Proper resolution of the DNS has been analyzed by considering the polynomial order convergence of the solution and the computation of the Reynolds stresses budgets.
