MOX, High Flyer (copy)

An aerial view of the Mixed Oxide Fuel Fabrication Facility, which is located at the Savannah River Site.

The second round of layoff notifications was issued at the canceled Mixed Oxide Fuel Fabrication Facility project on Thursday, according to people familiar with the matter.

It is not immediately clear how many MOX workers were affected by this layoff wave.

The layoffs, as they have before, came Thursday in the form of Worker Adjustment and Retraining Notification act notices.

The WARN act is a labor law that requires major employers to notify staff of mass layoffs or plant closures ahead of time. The WARN act affords workers 60 day's notice.

The first round of layoff notifications at the MOX project were issued in early November. Those layoffs affected more than 600 people – roughly a third of the total MOX workforce.

It took hours to complete the layoff notification process in November. The same can be said for the process on Thursday.

MOX, an incomplete venture at the Savannah River Site, was designed to turn weapons-grade plutonium into fuel for nuclear reactors. MOX was the product of a 2000s-era plutonium pact between the U.S. and Russia.

On Oct. 10, the National Nuclear Security Administration fully terminated the MOX project contract. The termination was effective immediately.

The NNSA is a semiautonomous U.S. Department of Energy agency in charge of the nation's nuclear complex and related nonproliferation.

MOX Services President David Del Vecchio, since the beginning of the termination process, has said layoffs would come in waves.

"As a reminder, all MOX Project ORANO and CPSG employees will eventually receive a WARN notice," Del Vecchio wrote last month in an internal bulletin. The Aiken Standard obtained that message, along with several others.

The next – and final – round of layoff notifications will be issued the week of Jan. 28, 2019, according to Del Vecchio's missive.

MOX Services is the MOX project prime contractor.

Colin Demarest is the government and Savannah River Site reporter with the Aiken Standard. Follow him on Twitter: @demarest_colin