Sword_Of_Truth
Penultimate Amazing
- Joined
- May 8, 2006
- Messages
- 11,494
Is uranium a finite resource ?
I'm going to copypasta what I wrote elsewhere on this topic:
This is a false claim made by the anti-nuclear lobby.
Most of the current generation of nuclear reactors run on U-235. Only about 0.7% of natural uranium mined out of the ground is U-235, the rest is almost all U-238 (with traces of U-234, U-236 and U-237). Uranium 235 is fissile,which means an atom of it gets hit by a neutron, splits and releases energy (more than 20 million times the energy released by breaking the electron bonds of a petroleum molecule in a chemical combustion reaction).
U-238 is fertile. Which means if it gets hit by a neutron, it won't split and release energy. But it will turn into something that does split and release energy if a second neutron comes along. A U-238 atom that picks up a neutron will turn into Neptunium-239 which after about 3 days will decay into fissile Plutonium 239. This occurs naturally in currently used reactors which run on Uranium that is enriched to 5% U-235, but the process isn't efficient enough to keep going on just the U-238.
Terrapower, a US company funded by Bill Gates (yes, that Bill Gates) that is in partnership with Toshiba to produce a new reactor design called the Traveling Wave Reactor that will both burn and breed its own fuel from U-238 without external support claims that the existing US stockpile of U-238 (mostly leftovers from enriching mined uranium into fuel or weapons grade material) is enough to fuel all of Americas energy needs for at least the next three thousand years.
Globally, there is enough proven reserves of conventional uranium to provide all of mankinds energy needs for 35,000 to 50,000 years. After that, the unconventional reserves (4.5 billion tons dissolved in earths seawater) are enough to extend our supply into the millions of years.
Thorium is several times more abundant in earths crust than uranium. Neither will last literally forever. That's what the other planets in our solar system are there for.![]()
Technically, yes, uranium and thorium are finite. There is only enough of it around to provide all our energy needs for a few dozen times the total length of recorded history to date. After that, we'll need to start filtering it out of seawater or go looking off-world.
Mmm.... copypasta.... *drool*