Development of scenario analysis and database for quantitative analysis of microbial effects on the repository performance

Yoshikawa, Hideki; Inagaki, Manabu; Miyasaka, Iku*

The scenario analysis was performed for microbial effect on the performance assessment (PA) of high level radioactive waste disposal system based on recent literature review. The consideration for PA with these effects was clarified and important FEPs were selected in the point of safety function under various uncertainties for microbe information. It is clear that the biological effect on groundwater components evolution, which is caused by the microbial redox reaction, is one of the most important issues to assess on PA. And we developed a biological parameter database which has growth and metabolism data for interactive six microbial groups. The database composed some significant data like specific growth rate, maximum growth rate, constant decay rate, and experimental condition for model assessment.