22 March 2012


Breeder reactors: A renewable energy source  (Am. J. Phys. 51(1), Jan. 1983)
Bernard L. Cohen
Department of Physics. University of Pittsburgh, Pittsburgh, Pennsylvania 15260
     Since energy sources derived from the sun are called “renewable,” that adjective apparently means that they will be available in undiminished quantity at present costs for as long as the current relationship between the sun and Earth persists, about 5 billion years. It is the purpose of this note to show that breeder reactors using nuclear fission fulfil this definition of a renewable energy source, and in fact can supply all the world’s energy needs at present costs for that time period......

.....We thus conclude that all the world’s energy requirements for the remaining 5 [billion] yr of existence of life on Earth could be provided by breeder reactors without the cost of electricity rising by as much as 1% due to fuel costs. This is consistent with the definition of a “renewable” energy source in the sense in which that  term is generally used.
     Nuclear fusion has been advertised as a method for “burning the seas.” We see that nuclear fission with breeder reactors is an alternative method for “burning the seas,” and it has the considerable advantage that the technology for doing it is in hand.

So, 29 years ago the calculations were done, to prove we had enough fertile isotopes of thorium and uranium to last 'forever'. All we need is a breeder reactor to deliver it safely and cheaply and everyone on Earth can have a decent standard of living, from a source which does not pollute the environment and degrade the chemistry of the atmosphere any further. 

  Foot-soldier-members of Greenpeace and Friends of the Earth:For goodness sake,use your common sense! You must stop listening to the deluded siren calls of your 'experts' and their  Energy [R]evolution wish-list.

If you get behind LFTRs you have the experience and wherewithall to make it happen, and make it happen quickly! 



  1. Wouldn't it be brilliant to have a 'nuclear power yes please' banner hanging there next to the greenpeace one?


  2. what is scientific notation
    Scientific Notation include in the mathematics course. In the world of science some time we deal with numbers which are very small and those which are very large. In some branches of science large numbers while in others very small numbers are used.