I am not sure how active it is but at least to some extent: http://www.ted.com/talks/bill_gates.html http://www.ted.com/talks/bill_gates.html About this talk:

I am not sure how active it is but at least to some extent: http://www.ted.com/talks/bill_gates.html http://www.ted.com/talks/bill_gates.html About this talk: At TED2010, Bill Gates unveils his vision for the world's energy future, describing the need for "miracles" to avoid planetary catastrophe and explaining why he's backing a dramatically different type of nuclear reactor. The necessary goal? Zero carbon emissions globally by 2050. http://en.wikipedia.org/wiki/Traveling_wave_reactor http://en.wikipedia.org/wiki/Traveling_wave_reactor TWRs differ from other kinds of fast-neutron and breeder reactors in their ability to, once started, reach a state whereafter they can achieve very high fuel utilization while using no enriched uranium and no reprocessing, instead burning fuel made from depleted uranium, natural uranium, thorium, spent fuel removed from light water reactors, or some combination of these materials. The name refers to the design characteristic that fission does not happen in the entire TWR core, but takes place in a fairly localized zone that advances through the core over time.