“…Here, we adopted the cost assumptions for the interim storage of PHWR spent fuels in accordance with the OECD (2006), ie, 70, 100, and 150 USD/kgHM being the lower, mode, and upper boundary values . The unit cost assumptions for the interim dry storage of PWR UO 2 spent fuels assumptions were utilized from the INL (2017), (ie, 223, 501, 644 USD/kgHM). For the interim storage costs of PWR MOX spent fuels without sufficient data, we conservatively assumed them to be as 1.5 times higher than that of PWR UO 2 spent fuels, ie, 752 USD/kgHM of the mode cost, 335 USD/kgHM and 966 USD/kgHM for the lower and upper boundary costs.…”