Rio Tinto subsidiary Energy Resources of Australia says it is close to restarting its uranium processing plant after a toxic leak in December.
Addressing shareholders at the miner's annual general meeting, chief executive officer Andrea Sutton noted the suspension of plant operations in December after a leach tank with a 1.5 million litre capacity failed.
The Australian government suspended processing at the Ranger mine site at Kakadu in the Northern Territory after the tank spilled out radioactive and acidic slurry.
Work to get the processing plant ready to restart is set to be completed this month, Ms Sutton said.
The group commissioned an investigation into the failure and is implementing the findings, including replacing the baffles, or devices that constrain flow, in all leach tanks.
Restart of the plant is subject to regulatory and board approval.
"This has been a serious incident, but I would like to acknowledge the efforts of our employees in responding safely to the incident and ensuring no one was injured," Ms Sutton said.
Rio Tinto owns 68% of Energy Resources of Australia.