A numerical simulation of a an experiment of accelerator driven system target model
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Accelerator transmutation of waste (ATW) is a new concept that would destroy actinides in spent fuel and produce electrical power. This study explores the possibility of modeling the thermal hydraulics of the system target with computational fluid dynamics (CFD). The benchmark for target model comparison is an experiment conducted by the Institute of Physics and Power Engineering on one particular ATW system concept. Thermocouples are used to determine the temperature profile and boundary conditions. Three-dimensional CFX-5.5 computer program is used in modeling the experiment behavior. The computational model results show that the calculated temperatures reasonably agree with the experimental data, especially in the low flow regions. The temperature gradient is higher in the experiment than in the computational model close the neighborhood of the heat source. This may be a result of false diffusion, which tends to smooth the gradient. Despite this shortcoming, the results of the calculations indicate that CFD is an effective tool for modeling the thermal hydraulics of an accelerator transmutation of waste system.
author list (cited authors)
Pratt, P. P., & Hassan, Y. A.