- #1,016
Wes Tausend
Gold Member
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mheslep said:Sounds like Alley is dabbling in social policy more than geology. Known land based reserves, today, are 5 million tons of Uranium; consumption is 68,000 tons/year or 73 years. Likely reserves are 7 million tons, or 102 years, and that is with no increase in reserves. Yet reserves have increased ~0.1 million tones per year on average over the last 35.Wes said:As a token of on-topic compliance, I should mention that I was disappointed to find we only have a thirty year supply of recoverable fissionable nuclear material at current production rates... according to Richard Alley and his sources
I think you are correct, Alley is dabbling in social science a least as much as geology, in his video and his book. But social acceptance may be the real underlying concern regarding what Russ's engineering theme in Post #1 boils down to. And perhaps addressing social science should be the first point in Russ's post #2. So Alley, and all of us, must attempt to address social issues if we are to succeed in making a difference.
Another way to put it, I think we all here agree the technology, and dire need for solution exists, so just why is it taking so long to implement? As a concerned individual and able scientist, I believe Alley is well aware that he must approach with social caution. I will venture to say that Russ also realizes this, but purposely avoids being immediately mired in social controversy (post #1, first sentence second paragraph). My opinion is Russ took his time, in being very careful and quite courageous, in starting this thread.
I made a grave error in assessing what Alley meant by originally assuming his statement on using cold-war materials constituted a current lack of robust uranium exploration. Alley didn't actually say that there was no significant active search. I made the unfortunate hurried assumption there may not be, and that error is on me.
I'm not sure why Alley said that we have 30 years of uranium left. His exact sentence reads, "The proven reserves of uranium available at modern prices are quite limited, enough for only about thirty years at current production rates". Perhaps he meant at the accelerated use rate of his 2030 goal plan, but he did not directly say that either.
As I indicated in post #1002, Alley's video advocates increasing the world use of nuclear from current 5% to 26%, so he does not appear negative to the use of nuclear power to me. (I have also seen a 6% current use figure, bandied about in his book pages.) So now we could possibly take his 30 year estimate to be the result of dividing your 73-102 year supply by 4 or 5 because of escalated nuclear implementation and then slightly improving procurement to arrive at 30 years. His "30 year" footnote reference is this Stanford pdf, but I did not see a 30 year figure mentioned in an initial quick scan of the 26 page document. A media expansion list of the document is here.
I did see one negative fact about nuclear reactors that I didn't know, in the above mentioned Stanford PDF (pdf page #19 under 9. Energy supply disruption). Apparently several reactors were shut down in France in the 2004 European heat wave. I assumed the reactors always worked, even in hot weather. Maybe it was a super-cautious safety issue, and/or inadequate design.
mheslep said:Uranium exploration is certainly ongoing, as indicated by the steady increase in known reserves.Wes said:We are now using surplus cold-war materials, not activly searching for more...
There are still other fission energy alternatives.
- Breeding fertile fuels, i.e. U238, into fissionable isotopes, in which case the supply of fissionable material multiplies ~150 times instantly, with the couple decade's of supply already mined, processed, and set aside.
- Thorium is also a fertile fuel.
- Seawater based Uranium and Thorium
Earlier, I mentioned (posts #994, #1005) micro reactors as a possible solution to increasing nuclear power. One 2014 source, http://www.world-nuclear.org/info/Nuclear-Fuel-Cycle/Power-Reactors/Small-Nuclear-Power-Reactors/, comes from the same World-Nuclear.org link as your chart image above. Another 2013 NPR link claims the U.S. is already investing in these small, mass produced units. Wikipedia has a brief mention of Micro Reactors. These can be cooled by gravity-fed coolant water, eliminating pump failure.
Do you think they could be sufficiently cooled just anywhere after sustained operation? How? Secondary geothermal transfer? That would immediately involve pumps, even if a limited reservoir of gravity-fed emergency coolant was available. One might think that nuclear submarines might have solved heat containment, or else they are leaving a tell-tail non-stealthy thermal trail behind them. Anybody?
Thanks,
Wes
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