Development of a dose rate prediction method for various sampled fuel debris

Okumura, Keisuke; Terashima, Kenichi

no journal, , 

The dose rate of fuel debris retrieved from the Fukushima Daiichi Nuclear Power Plant is necessary for radiation shielding, exposure management of workers and so on. However, it depends on many parameters of fuel debris such as size, radiation source nuclides, elemental composition, density, porosity, burnup, and evaluation time. Therefore, we have developed a dose rate prediction formula applicable to various fuel debris by combining theoretical models and a large amount of photon transport calculations with PHITS code.