[2E05-09] FP Behavior

11:05 AM - 11:20 AM JST(2:05 AM - 2:20 AM UTC)

[2E07] Evaluation of FP Behavior Models in SAs(7) Evaluation of chemical reactivity for Cs-I-Ag-In-Cd-H2O system

*Hidetoshi Karasawa¹, Shuhei Miwa¹, Chiaki Kino² (1. JAEA, 2. IAE)

Keywords:

SA analysis code,chemical reaction model,gaseous iodine,control rod material

In order to add a chemical reaction module to the SA analysis code, the validity of the ECUME/chemical reaction dataset has been examined. So far, the chemical reactivity in the Cs-I-B-Mo-H2O system has been evaluated by test analyses of tests using a TeRRa apparatus with a temperature gradient pipe. In this study, we evaluated the chemical reaction behavior of the Cs-I-Ag-In-Cd-H2O system in the primary system analysis of the Phebus-FPT1 test. In SA analysis, the node junction method is used, so the effect of node size, i.e., chemical reaction time within the node, was examined. When the node size was increased, the amount of gaseous iodine production increased. The dependence of the gaseous iodine production amount on the node size was examined to check the range of uncertainties that arise when applied to SA analyses.