The Dept. of Energy's $7.7-billion Mixed Oxide Fuel Fabrication Facility at the Savannah River Site in Aiken, S.C., isn't dead yet. But the Obama administration's March budget request to put the unfinished plutonium disposal facility into "cold standby" could sound the troubled project's death knell.

The lack of an official cost and schedule estimate, lax oversight by the project owner and suspected unforeseen design challenges sent construction costs soaring, according to a recent report from the Government Accountability Office (GAO). Long-term operational costs have more than doubled over early estimates, and DOE has failed to line up a utility willing to use MOX fuel. For an administration under pressure to rein in federal spending, the decision to seek other alternatives for disposing of the material was a relatively easy call.