Cameco, the Canadian uranium developer, has agreed to buy a uranium deposit in Western Australia from BHP Billiton, days after the latter’s announcement that it would not develop any project of the nuclear fuel bar its Olympic Dam venture as they were too small a scale to fit into BHP’s portfolio. The Yeelirrie mine will change hands for US$ 430 million, Cameco said, adding it will make additional drilling for geochemical samplings at the site.