In this PhD topic, numerical simulation tools and experiments will be combined to study the mass transfer and trapping/deposition of oxygen and impurities (mainly corrosion products) in non-isothermal LBE cooled systems. This should result in design recommendations for an LBE filter and cold trap - or a combined filter/cold trap - that can be implemented in the MYRRHA conditioning system.
To develop an efficient impurity control system, experiments will be performed in the MEXICO chemistry control loop in parallel with numerical simulations.
Specific objectives are the following:
- Mass transport and trapping of oxygen:
- Determination of cold trapping kinetics and efficiency for oxygen (as PbO) by monitoring the differential pressure and oxygen concentration over the cold trap/filter in an LBE loop
- Establish the link between the pressure drop over the cold trap and the amount of PbO accumulated in the trap by comparing experimental results and numerical simulations.
- Mass transport of and trapping of Ni
- Measurement of cold trapping/filtering kinetics and efficiency for Ni
- Comparison with numerical simulations to study long-term evolution of the Ni content in an LBE loop.
In the second phase of this PhD project, the results will be used to design a cold trap/filter which will be installed in a scaled mock-up of the MYRRHA conditioning system and which is to be connected as an external loop to the existing E-SCAPE facility. The final objective is implementing the mass transfer of oxygen and corrosion products in the thermal-hydraulic model of E-SCAPE and validation of this model against experimental results.