McArthur expected to produce 15 million pounds annually beginning in 2024.
Orano will build an embankment around the top of the tailings pit.
Canadian uranium producer Cameco said Jan. 6 that it may restart its Canadian uranium operations.
Detector works high-energy particles that result from cosmic ray showers
Owner Cameco cited increased risk from pandemic for putting operation on care and maintenance.
Initial stoppage will extend for four weeks amid COVID-19 concerns