Studies of effectiveness of gaseous iodine purification
These studies relate to installed devices or innovative prototypes in effluent conditions ranging from normal operation to severe accidents.
The PERSEE facility will carry out the tests proposed under the MiRE (Mitigation of Releases into the Environment in a nuclear accident) programme, launched by IRSN in January 2014. This programme, which was selected by the French national research agency (ANR) in the context of its 2012 call (post Fukushima) for research proposals on nuclear safety and radiation protection (RSNR), aims at improving the management of radioactive releases during a core melt accident in a nuclear reactor. The facility has also provided some test results for the European PASSAM (Passive and Active Systems on Severe Accident Source Term Mitigation) programme.
Studies of iodine adsorption mechanisms in all
types of adsorbents
It concerns the purification coefficients of a material or trap, to be worked out from its intrinsic physical and chemical characteristics, and from the temperature, relative humidity and flow rate of the carrier gas.To determine the decontamination factor of an adsorbent characterised by its physical and chemical properties and not solely by its commercial references.To separate the influence of different parameters.To assess the respective contributions of the competing trapping mechanisms.To determine the conditions that favour desorption.To predict the effectiveness of an iodine trap based on the adsorbent characteristics, the thermodynamic conditions in which it is used and the chemical form of the challenging gaseous iodine.
The purpose of this research is to determine the conditions in which different adsorbents operate at their best and thus to identify the conditions that degrade their performances, in order to design new, more reliable and more efficient devices. More specifically, the aims are as follows: