Calibration of Burnup Monitor of Spent Nuclear Fuel Installed at Rokkasho Reprocessing Plant

摘要

The spent nuclear fuel storage pool of Rokkasho Reprocessing plant adopts "the burnup credit" conception. Spent fuel assemblies are measured every one by one, by burnup monitors, and stored to a storage rack which is designed with specified residual enrichment. For nuclear criticality control, it is necessary for the burnup monitor that the measured value includes a kind of margin, which consists of errors of the monitor.