If that is true, Australia would have to export natural uranium and import back uranium enriched in 235U, unless they would choose to build a reactor with heavy-water, which can use natural uranium as a fuel.
Australia is one of the most affluent countries in world history and hyper resource rich.
They should have a third of their energy supply coming from nuclear.
Nuclear is expensive (commonly said)? So what. Australia is hyper rich ($67k GDP per capita) and can afford to do it and can afford to subsidize it for consumers. What's a lot more expensive (risk) is having a weak, unreliable grid with a poor diversity of energy sources.
It's insane not to subsidize nuclear, if one believes even the calmer side of environmental warnings re climate change. It's extremely potent energy technology, we know how to build it, and we know we can keep improving on it yet.