Molecular structures and thermodynamic properties of monohydrated gaseous iodine compounds: Modelling for severe accident simulation
Source abstract
Abstract
Abstract Monohydrated complexes of iodine species (I, I2, HI, and HOI) have been studied by correlated ab initio calculations. The standard enthalpies of formation, Gibbs free energy and the temperature dependence of the heat capacities at constant pressure were calculated. The values obtained have been implemented in ASTEC nuclear accident simulation software to check the thermodynamic stability of hydrated iodine compounds in the reactor coolant system and in the nuclear containment building of a pressurised water reactor during a severe accident. It can be concluded that iodine complexes are thermodynamically unstable by means of positive Gibbs free energies and would be represented by trace level concentrations in severe accident conditions; thus it is well justified to only consider pure iodine species and not hydrated forms.
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Research context
OpenAlex topics: Thermal and Kinetic Analysis · Nuclear Materials and Properties · Chemical Thermodynamics and Molecular Structure
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References (77)
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