FILE PHOTO: The seal of the Department of Commerce is pictured in Washington, D.C., U.S. March 10, 2017. REUTERS/Eric Thayer/File Photo

WASHINGTON (Reuters) – The U.S. Commerce Department has submitted to the White House the results of a national security investigation into uranium imports, a spokesman for the department said on Monday.

The “Section 232” probe was prompted by a petition filed by two U.S. uranium mining companies, Ur-Energy Inc and Energy Fuels Inc, complaining that subsidized foreign competitors have caused them to cut capacity and lay off workers.

U.S. nuclear power generators oppose the federal government taking action and have argued tariffs or quotas would increase costs for the struggling industry and possibly cause some reactors to shut.

The Commerce Department declined to discuss the