Reference material: Japan’s Separated Plutonium Inventory (as of 31 Dec. 2019)
By Ban Hideyuki, CNIC Co-Director
The Atomic Energy Commission released the official report on Japan’s plutonium holdings as of the end of 2019. Significant changes included the amount of plutonium stored at reactors in use, which dropped by 160 kg. Also, the 260 gram decrease in plutonium held at JAEA’s Fuel Fabrication Plant was attributed to more accurate measuring of Pu holdings. Detailed breakdowns of increases/decreases are not shown here, but the categories are: 1) Retained waste; 2) Reclaiming retained waste; 3) Nuclear loss; 4) Measured discard; and 5) Material uncounted for.