The receipt of two licences from the Washington Department of Health marks a major milestone for fusion company Helion in its project to build its Orion nuclear power plant.
The two boiling water reactor units at Georgia Power's Edwin I Hatch plant have been cleared by the regulator to operate until the mid-2050s.
The US Department of Energy's approval of the Preliminary Documented Safety Analysis is a major step on the authorisation pathway for Oklo's Aurora powerhouse which is to be built at Idaho National Laboratory.