Uranium Overview Properties Radiation Finding Uranium Regulators Markets Uranium in Saskatchewan Nuclear History Timeline Nuclear Fuel Cycle Mining & Milling Establishing a Mine Mining Milling After Mining More Topics Safety Environment Cameco's Role Markets Types of Careers Learn More Fuel Processing Refining & Conversion Enrichment Fuel Manufacturing More Topics Safety Environment Cameco's Role Markets Types of Careers Learn More Electricity Generation How Reactors Work Types of Reactors Nuclear Power Advantage Energy Demands More Topics Safety Environment Cameco's Role Markets Types of Careers Learn More Spent Fuel Management Spent Fuel Reprocessing Long-Term Storage More Topics Safety Environment Cameco's Role Learn More Menu Search Spent Fuel Management More Topics 2013-05-15 00:00:00 By Cameco Safety › Environment › Cameco's Role › Learn More › Safety › Cameco's Role › Environment › Learn More › Prev PageLong-Term Storage Next PageSafety Some 140 maritime vessels, mostly submarines, powered by over 180 small nuclear reactors, have accumulated more than 12,000 reactor years of marine operation.