A chemical kinetic model has been constructed to predict the gas and electron temperature dependence of the neutral and ionic species composition in Ar-CO2 mixtures under thermal plasma conditions. The model includes electron impact, thermal impact, ion-molecule, and recombination reactions as well as accounting for diffusion. Important metastable and excited states of species have been accounted for as well as the presence of neutral molecules, radicals, and atoms, positively and negatively charged atoms and molecular ions, and electrons. All relevant electron temperature, gas temperature and pressure terms have been included. Under thermodynamic non-equilibrium conditions, Ar, CO, and O were found to be the dominant neutral species, CO4
+ the dominant positive ion, and O- and electrons the dominant negatively charged species.
A chemical kinetic model has been constructed to predict the gas and electron
temperature dependence of the neutral and ionic species composition in
Ar-H2 mixtures under thermal plasma conditions. The
model includes electron impact, thermal impact, ion-molecule, and recombination
reactions as well as accounting for diffusion. Important metastable and excited
states of species have been accounted for as well as the presence of neutral
molecules, radicals, and atoms, positively and negatively charged atoms and
molecular ions, and electrons. All relevant electron temperature, gas
temperature and pressure terms have been included.
Calculations were performed for electron and gas temperatures between
300 and 15000 K and various pressures.
Under equilibrium and non-equilibrium conditions, Ar, H2, H,
ArH3
+, Ar+, H+, H- and electrons
were found to be the dominant neutral and charged species.
No significant negative ion concentrations are observed.
Alkali metal heat pipes can be used for core cooling in advanced micro and small modular reactors. This article provides a detailed review of currently available saturation property correlations for potassium that can be utilized in heat pipe simulation models. Using these properties, numerical models will be developed and employed to simulate and compare the performance of heat pipes models to experimental results. A comprehensive comparative overview of the best available potassium saturation property correlations developed over the past century has been assembled. The results show most of the potassium property correlations needed to model a heat pipe are relatively well defined and recommendations for their use can be provided, but the findings also suggest a significant disparity in some cases.
Small Modular Reactors (SMRs) are actively being considered for use in Canada. Some proposed SMRs can make use of solar salt as an intermediate coolant for a heat storage system. The development of thermalhydraulic simulation tools is one of the key capabilities needed to examine the performance of SMRs and license this class of reactors. This article summarizes the implementation of molten solar salt fluid properties into the ARIANT thermalhydraulic code and uses the code to simulate a high temperature gas-cooled SMR with helium and solar salt as its primary and secondary coolants during a pressurized loss of forced circulation (PLOFC) event. This work demonstrates the ability of ARIANT to simulate transient events in a two loop reactor system consisting of helium and solar salt as coolants and helps to establish ARIANT as a tool for SMR analysis.
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