
A leaked report from a nominally independent office within the National Nuclear Security Administration offers a trove of new details about the cost estimate for a plan the agency must sell to Congress to start producing nuclear-warhead cores in South Carolina.Last week, Energy Secretary Rick Perry said he would officially cancel the Mixed Oxide Fuel Fabrication Facility (MFFF) — intended to deweaponize 34 metric tons of surplus weapon-usable plutonium — and convert the unfinished building into a factory capable of…