by Starvid » Sun 18 Sep 2005, 08:45:45
Uranium supply is discussed extensively in this thread:
http://www.peakoil.com/fortopic11541.html
edit: I did a very simple back-of-the-handkerchief analysis on this some time ago. I'll post it here. It is not complete, it is very basic, but it gives you some idea of the dimensions of the issue.
$this->bbcode_second_pass_quote('', 'F')inity of nuclear fuel: In theory nuclear fuel is finite. So is solar power, since solar power is the radiation from the big fusion plant in the sky. In practice they are both sustainable.
Let's do some counting. Let's say all primary energy is changed to nuclear. Let's also say energy use increases 50 %. Today nuclear energy is 6-7 % of all primary energy. That means we need a 15-fold increase, and then 50 % on top of that. Today the reserves of nuclear fuel are enough for about 200 years.
200/15=13,33 years
13,33/1,5=8,9 years
Spooky huh? Well, no, because we can get breeder reactors. That means we get 60 times as much energy from the fuel.
8,9*60= 533 years
Ergo= If we get breeders up and working we are set for quite a long time.
But this is not all ( I sound like a TV-Shop guy), you also have thorium! There is 3 times as much thorium in the ground as there is uranium, but I don't know if thorium can be bred. (edit: it can be bred) Devil probably knows. But there is more! There is also insane amounts of uranium solved in the sea! We are not really sure how to get this uranium into the reactors, but when (if) we do, we are just as home free as if we manage to harness fusion.
Some comments on the analysis above.
* I have set the amount of uranium at current usage at 200 years. This is pretty much a guess, since no one really knows how much uranium there is out there. People usually say 70-200 years.
* I have not included potential (even likely) new finds of uranium due to the increased uranium price.
* It does not include the 30 % more effecient uranium use brought by reprocessing.
* Energy needs could increase a lot more than the 50 % projected. If a future 10 billion population all want to live at our current level there would be an energy use increase of something like 700 %.
edit2: The Times article is about a short-medium term eventual shortage brought by lack of capacity, not because of lack of reserves.
http://business.timesonline.co.uk/artic ... 34,00.html
The Australian Financial Review has several severe factual errors and I wouldn't worry much about it.
http://afr.com/articles/2005/06/23/1119321845502.html
By the way, it's pretty scary that a prestigious paper like AFR let's through major errors. I am just wondering what other false stuff journalists write about subjects one doesn't have knowledege of, stuff one accept as facts.
