Kiche; A Simulation tool for kinetics of iodine chemistry in the containment of light water reactors under severe accident conditions (Contract research)

An iodine chemistry simulation tool, Kiche, was developed for analyses of chemical kinetics relevant to iodine volatilization in the containment vessel of light water reactors (LWRs) during a severe accident. It consists of a Fortran code to solve chemical kinetics models, reaction databases written in plain text format, and peripheral tools to convert the reaction databases into Fortran codes. Potential advantages of Kiche are the text format reaction database separated from the code that provides flexibility of the chemistry model, and being a Fortran code relatively easily coupled with other codes such as severe accident analysis codes. This document describes the model, solution method, code structure, and examples of application for simulation of experiments. The appendixes give practical information for the usage of Kiche system.