PARIS project: Radiolytic oxidation of molecular iodine in containment during a nuclear reactor severe accident: Part 2. Formation and destruction of iodine oxides compounds under irradiation – Experimental results modelling

摘要: Abstract In the case of a severe accident in nuclear Light Water Reactor (LWR), high radiation fields reached reactor containment building due to release fission products from core would induce air radiolysis. The radiolysis (ARP) could, turn, oxidise gaseous molecular iodine (I2) into aerosol-borne iodine–oxygen–nitrogen compounds, abbreviated as oxides (IOx). These reactions involve conversion compound resulting change depletion rate atmosphere. Kinetic data were produced within first part PARIS project on formation and destruction. second presented this paper deals with impact ARP I2 IOx. objective was provide database develop new or validate existing kinetic models destruction oxides. tests project, performed at very low, realistic concentrations, constitute an important further empirical mechanistic radiolytic oxidation. presence painted surface areas silver aerosol areas, oxidation is negligible compared adsorption these surfaces for conditions examined. However, remains efficient if are small they made relatively non-reactive stainless steel.