Shape estimation of radioactive spent resins in a storage tank using the sampled pattern matching

A method for estimating the shape of accumulated radioactive spent resins in a storage tank has been proposed using the sampled pattern matching. In a two-dimensional simulation model, several kinds of the resin shapes are assumed, and the radiation fields outside the tank are calculated. The resin shapes were estimated using the simulated radiation field data and compared to the assumed shapes, resulting in reasonable agreements between them.