Inventory (continued): spent fuel, plutonium, thorium
Not all the spent fuel that comes out of reactors is reprocessed. Some of it is stored in pools, including spent MOX fuel assemblies (170 tonnes in 2010). The 40 tonnes of plutonium are the plutonium not used in the manufacture of MOX fuel. ANDRA also counts thorium, which could be used in possible thorium reactors.
Source: ANDRA 2012 Inventory