Lets first consider all Uranium in Earth's crust, about 65 trillion tons. So given, - 65e15 kg = Uranium in Earth's crust - 709000 = 709,000 MJ/kg energy d

Lets first consider all Uranium in Earth's crust, about 65 trillion tons. So given, - 65e15 kg = Uranium in Earth's crust - 709000 = 709,000 MJ/kg energy density of natural U² - 500e12 MJ = 500 million TJ annual global energy usage - 92e6 = 65e15 × 709e3 / 500e12 So 92 million years. Australia has about 1.7e9 kg of reserves at current prices¹. That comes to 2.4 years. [1] https://en.wikipedia.org/wiki/Peak_uranium https://en.wikipedia.org/wiki/Peak_uranium [2] https://www.plux.co.uk/energy-density-of-uranium/ https://www.plux.co.uk/energy-density-of-uranium/