According to a report issued by the U.S. Government Accountability Office on February 14, 2013, NNSA recently added $2 billion to the cost of construction of the MOX Fuel Fabrication Facility (MFFF).

Tom Clements summarized the history of the MFFF cost increased as follows:

In 2004, the facility was estimated to cost $1.8 billion. In 2007, the estimate was $4.8 billion, where the cost has been frozen until now. The $6.8 billion price tag now on the facility represents a single, massive jump in the cost estimate of about 30%.

According to Tom Clements, the overall cost of the plutonium disposition program has now reached $18 billion.