Well, according to "Sustainable Energy Without the Hot Air" >Japanese researchers have found a technique for extracting uranium from seawater at a cost of $100

Well, according to "Sustainable Energy Without the Hot Air" >Japanese researchers have found a technique for extracting uranium from seawater at a cost of $100–300 per kilogram of uranium, in comparison with a current cost of about $20/kg for uranium from ore. Because uranium contains so much more energy per ton than traditional fuels, this 5-fold or 15-fold increase in the cost of uranium would have little effect on the cost of nuclear power: nuclear power’s price is dominated by the cost of power-station construction and decommissioning, not by the cost of the fuel. Even a price of $300/kg would increase the cost of nuclear energy by only about 0.3 p per kWh. The expense of uranium extraction could be reduced by combining it with another use of seawater – for example, power-station cooling. https://www.withouthotair.com/c24/page_165.shtml https://www.withouthotair.com/c24/page_165.shtml https://www.withouthotair.com/c24/page_174.shtml https://www.withouthotair.com/c24/page_174.shtml