Jason Mauldin wrote:
Donnie Barnes wrote:
Realistically we would need to spend a good bit of money on handling nuclear waste first. Fix THAT problem and I think a LOT of the nuke opposition goes away. And it can be fixed.
http://en.wikipedia.org/wiki/Nuclear_reprocessingIt looks like the spent waste can be reprocessed and used again. I don't know how much of the problem this solves, but it looks like cost was the determining factor in not doing it. However, based on the chart it looks like other countries are still reprocessing it.
Might look that way, but trust me, that's light years away from the truth.
A fuel rod array becomes too "weak" to use economically and/or to produce fission reaction when about 75% of the fissionable Uranium and Plutonium has been converted to waste. At that point the rods are removed and replaced by a fresh array. This is a typically done about once per year. These rods are extremely radioactive and produce a great deal of heat. They must be immediately transfered to a "swimming pool" full of boron laced water that is circulated and cooled constantly. Should the cooling or pumps fail, or the pool suddenly empty, it would be a matter of minutes to hours before the rods melted, and the pool contents become critical (go BOOM!). When we (Nuclear Fuel Services, West Valley NY) were reprocessing fuel, the spent rods, after cooling for about two years on site were shipped to us in huge casks on RR cars. (We all should realize by now the poor condition of the nation's rail lines by the number of train wrecks) The casks were unloaded into our pool to cool for about another two years before considered safe to reprocess. The bright blue glow of that pool was both frightening and erily beautiful to see!
I can explain how the purex process of reprocessing works in detail (I was a process control lab chemist there, we tested process samples to be sure a criticality didn't occur and the process was proceding properly and to account for all the fissionable products), but let's cut to the chase: The process reclaimed physically a very small amount of reusable product and hundreds of gallons of high level liquid waste and hundreds of pounds of solid low level waste. The liquid waste went into 500,000 gallon tanks burried 20' deep in the ground, the solid waste went into a GIGANTIC burial pit. The high heat and radiation broke down equipment about as fast as you could replace it, so unsalvagable/unrepairable. no longer useful equipment was also given a decontamination wash and burried as well. Once ANYTHING came thru the inner gate it could not leave again. They buried vehicles and even a couple of the RR cask cars. When I left we had nearly filled 2 of the high level liquid waste tanks and were getting ready to install a 4th one, there always had to be an empty tank at the ready in case ( or depending on who you talked to, when) one should spring a leak. That tank field was so "hot" radiactively that we were not allowed to get any closer than 100 yds of it even for a brief time and so thermally hot that snow never covered it even tho it was in the heart of the WNY snow belt! The ground over it was more sterile than a hospital! That liquid will remain that radioactive and deadly for the next hundreds of thousands of years! Even if the half-lives of the actinides were as little as 10 years, that stuff would not be safe to be around for centuries.
Donnie, I actually do keep up with all the proposed solutions to the waste, but I haven't seen any ideas that wasn't just pushing the disposal problem off onto future generations (deep burial/glass encapsulation etc) or prohibitively unrealistically expensive (shooting it into the sun), and extremely dangerous for anyone to run such operations (robot operators are totally unrealistic given the environment. We had 6 hot cells with a pair of remote manipulators in each. We had at least two cells down because of broken manipulators constantly, and recall once where the plant had to shut down processing because all our manipulators were broken so we could not process the high level samples.
If anyone wants to hear what really went on there (Like MUFs, fissionable materials unaccounted for), and the underlying real costs and dangers of nuclear power ask me when you see me.