Gas entrainment in the IHX vessel of top-entry loop-type LMFBR

Formulations and Validations of a High-Precision Volume-of-Fluid Algorithm on Nonorthogonal Meshes for Numerical Simulations of Gas Entrainment Phenomena

“…Since bubbles entrained to the coolant due to GEs might cause power disturbances when they go through the reactor core, the JSFR must be prevented from GEs for a stable operation. However, it was also confirmed by experimental studies on JSFR systems 6) that the occurrences of vortex-induced-type GEs are not predicted theoretically. Therefore, a full-scale experiment is a reliable way of evaluating the onset conditions of vortex-induced-type GEs in the JSFR although it is very expensive to conduct a full-scale experiment.…”

Design challenges for sodium cooled fast reactors

“…One is the Froude (Fr) number similar condition where free surface deformation and also the flow pattern are expected to be similar to that in the designed reactor. The other has the same velocity conditions as the reactor which is set as a criterion to examine the onset conditions of gas entrainment based on the similarity study for DFBR [8].…”

CFD-based Evaluation of Interfacial Flows

“…1, the GE phenomena in FRs have been classified into three patterns, i.e. waterfall, interfacial disturbance and vortical flow types (Eguchi et al, 1984). Former two patterns can be suppressed by reducing the horizontal velocity at the gas-liquid interface.…”