MOX fuel in the United States-
One of the Fukushima reactors (No. 3) used MOX fuel from the Areva plant in France. Areva is an international concern, headquartered in France, with some 50,000 employees worldwide.

In the U. S. it is combined with the Shaw Group, into Shaw Areva MOX Services.
In South Carolina, at the Savannah River site, it is building a plant to blend weapons-grade plutonium with uranium to form the fuel mixed oxide, or MOX. Costs of the plant so far are $5 billion, 2000 workers are at the site.
It has been described as a 'swords into plowshares' program and is supported by the Obama administration. The U. S. has 43 tons of surplus plutonium.

So far, the government hasn't found a customer [why has the French plant successfully sold MOX not only to Japan but other Asian countries for reactors?].
The Tennessee Valley Authority might use some of the fuel in its reactors.

The plant may be stopped; Edwin Lyman of Union of Concerned Scientists calls it a "plant to nowhere." That would leave the U. S. without a way to dispose of its surplus plutonium.

Hearings are scheduled. It is possible that the site could become just a dumping ground.
Health risks, plus the possible spread of nuclear weapons to new countries, are among the drawbacks cited by legislators and regulators.

New York Times, article "New Doubts about Turning Plutonium Into a Fuel," Jo Becker and William J. Broad, April 10, 2011.

Notes-
-Areva also is a leader in wind-power installations.

MOX may become an obsolete fuel, as new designs for reactors are already being put into production.