OAK RIDGE, Tenn. — For decades Oak Ridge National Laboratory has been housing uranium 233. It was once a hopeful prospect as fuel for nuclear energy, but other resources were deemed to be better.

Oak Ridge Environmental Management office's Uranium-233 contract has been modified to allow the contractor to participate in a medical research arrangement, according to the office.

SNC-Lavalin's Isotek Systems, LLC business and the US Department of Energy have signed a USD254 million contract modification to perform processing operations to dispose of uranium-233 material up ...