Energy Resources of Australia is working with a government appointed taskforce as it investigates the cause of an acid leach tank failure earlier this month.
Clean-up operations began in earnest last week following the incident.
ERA chief executive Andrea Sutton said efforts are well-advanced.
"This is a serious issue and we are confident that we have the technical expertise to manage the incident,” she said.
The Federal Government announced this week the mine will not be able to restart production operations without regulatory approval and the go ahead from this joint operation taskforce.
Sutton stated that there will "be a full investigation into the incident and we are co-operating with Commonwealth and Territory regulators, and key stakeholders".
On Friday ERA met with these regulators and stakeholders on Ranger's Minesite Technical Committee (which is comprised of the Northern Territory Department of Mines and Energy, the Office of the Supervising Scientist, and the Gundjeihmi Aboriginal Corporation) to discuss the current clean-up operations and regulatory response to the incident.
An external structural engineering is also advising ERA on the clean-up of the support structure surrounding the remaining leach tanks, and ensuring that these tanks are structurally sound, following a similar incident to that at Ranger at Rio Tinto's other uranium mine Rossing, in Namibia, only days after the initial spill.