An approach to numerical simulation and analysis of molten corium coolability in a boiling water reactor lower head

Computational Fluid Dynamics Study of a Corium Pool in a Candu Calandria

“…The most accurate representation of turbulence in buoyant flows with large values of Ra′ may be provided by a transient solution using Large Eddy Simulation [8]. However, in a large 3-dimensional domain with wall boundaries and slow transients, Large Eddy Simulation would require a very large mesh and a large number of time steps that would be prohibitively expensive to implement.…”

In-Vessel Core Degradation

“…An extensive study on the efficiency of CRGT cooling as a SAM measure has been conducted at the Royal Institute of Technology [75] [76] [77] [78]. Figure 2.33 shows a conceptual configuration of corium pool in a BWR lower head with CRGT cooling and top flooding.…”

Block triangular preconditioners for linearization schemes of the Rayleigh–Bénard convection problem

“…Rayleigh–Bénard convection problems have several interesting applications because of the mutual interaction between coexisting physical mechanisms such as buoyancy, fluid viscosity, and heat conduction. Among them, we may cite boiling water nuclear reactors, multiphase flows, and atmospheric flows . Buoyancy‐driven flows attract the attention of the scientific community because they are characterized by the onset of instabilities, which lead to interesting flow patterns .…”

“…Among them, we may cite boiling water nuclear reactors, multiphase flows, and atmospheric flows. [4][5][6] Buoyancy-driven flows attract the attention of the scientific community because they are characterized by the onset of instabilities, which lead to interesting flow patterns. 7 As an example, the inherent structure of these patterns has been envisaged for the design of thermally activated chemical reactions that require temperature cycling.…”