Why send high grade material that could run nuclear reactors for 100s of years into space.
The pits from nuclear weapons can be mixed with lower grade reactor fuel material and depleted uranium to make reactor fuel.
This along with reprocessing used fuel rods would give the US enough fuel to run 500 reactors for 500 years without mining any more uranium.
The US has the uranium and other nuclear fuels (thorium)in used rods, old nuclear fuel and in the ground to run 1000+ reactors for 1000 years.
en.wikipedia.org...
www.futurepundit.com...
www.anl.gov...
Using the right nuclear cycle we have enough to last till the sun burns out.
In 1983, physicist Bernard Cohen proposed that uranium is effectively inexhaustible, and could therefore be considered a renewable source of
energy.[4] He claims that fast breeder reactors, fueled by naturally replenished uranium extracted from seawater, could supply energy at least as long
as the sun's expected remaining lifespan of five billion years.[4] - whilst uranium is a finite resource mineral resource within the earth, the
hydrogen in the sun is finite too - thus, if the resource of nuclear fuel can last over such time scales, as Cohen contents, then nuclear energy is
every bit as sustainable as solar power or any other source of energy, in terms of sustainability over the finite realistic time scale of life
surviving on this planet.
We thus conclude that all the world’s energy requirements for the remaining 5×109 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.
His paper assumes extraction of uranium from seawater at the rate of 16 kilotonnes (35×10^6 lb) per year of uranium and that the cost of electricity
will rise no more than 1% due to fuel costs.[4] The current demand for uranium is already near 70 kilotonnes (150×10^6 lb) per year. Cohen's paper
does not give a date when demand of uranium exceeds the supply of uranium. However, since he calculates using breeder technology uranium would be used
at least 60 times more efficiently than today.
[edit on 13-5-2009 by ANNED]