[2O07-10] FP Behavior, FCVS

[2O07] A sensitivity analysis of the iodine production using a reaction kinetics dataset

*Giedre Zablackaite¹, Hiroyuki Shiotsu¹, Xiaoyu Zheng¹, Kentaro Kido¹ (1. JAEA)

Keywords:Sensitivity analysis, iodine chemistry, reaction rate constant, Arrhenius parameters, Monte Carlo, KICHE, RAPID

In the source term evaluation, iodine chemistry greatly impacts the release from an aqueous phase like the water pool in the suppression chamber of a BWR plant. Although the release strongly depends on the production of iodine molecules in the aqueous phase, limited information is available on the important reaction pathway in the kinetics. In this study, using a dataset in which Arrhenius parameters are provided for each reaction, an extensive sensitivity analysis with Monte Carlo sampling of the parameters is performed by the combined KICHE/RAPID codes under conditions corresponding to a severe accident. The correlation between the released amount and chemical reactions listed in the dataset is investigated as well as the uncertainties induced by temperature.