The goal of this thesis is to develop a 1-D thermal hydraulic code which also includes the main chemical processes occurring in LBE systems, at minimal computational cost.
Examples of in-house system codes for transport and chemical reactions of species in liquid metals (e.g. corrosion product species) are available from Russian experience , so a starting point exists. Similar codes have been also developed for PWR analysis . In the first part of the thesis a literature review of the aforementioned codes is required in order to acquire the necessary theoretical knowledge for the appropriate mathematical formulation of the problem.
Then, the work will focus on the code development.
In a first approximation it can be assumed that the concentration of the different species will not influence the flow and temperature fields (one-way coupling approach). Hence, the flow and temperature fields (steady state conditions for normal operation or even time-dependent flow and temperature fields in case of transient studies) can be pre-calculated. The first main objective is to provide a suitable tool for the resolution of flow and temperature fields over a computational domain. Appropriate spatial and time discretization methods should be defined at this stage.
In a second stage, species mass transport should be also included, taking into account the proper boundary conditions.
If time will allow, a latest step could involve the formulation of species relaxation to their chemical equilibrium, based on Gibbs free energy minimization.
A preliminary application and validation of the developed code could be applied to existing LBE loops such as MEXICO, where the combined effect of LBE chemistry and thermal hydraulics can be measured.
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