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Gelsamel wrote:Does Greenpeace do anything pro-environment any more or is it all anti-government/big-business?
They do plenty. Perhaps you don't hear about it because government is so anti-environment that the conflict between the two is such a large focus.Does Greenpeace do anything pro-environment any more or is it all anti-government/big-business?
Do you have ANY idea how much damage GM crops have done to third world countries in the past? A considerable proportion of 3rd world debt is due to big companies in the 70s moving in to Africa with drought resistant crops to "help combat starvation". The locals started growing the crops and soon became dependant as they let their old crops die out. The companies then decided to seek reward for their "charity" and charged the people now using their patented crops, the natives had no means of paying and no means of giving up the crops, pushing them continually further into poverty. Sure GM crops are great in some cases, but corporate greed and the flaws of the patenting system are huge hindrances to moving in that direction.And they seem to be anti-government/big-business to the point where they're effectively anti human life. Take a look at their staunch opposition to GE crops which could save countless lives in developing countries.
Heh, I wish that sort of thing happened more often in this part of the world... *cough* pulp mill. :/On a technicality. The government originally promised a 'full public consultation', but greenpeace took them to court on the claim that the government-issued paper didn't enclose every single detail. The judge ruled in greenpeace's favour, forcing the government to go back to the drawing board and start the whole review again. Really, it was just a strategy on greenpeace's behalf to stall the implementation of replacing our existing nuclear power plants which will soon expire and add some extra ones to reduce our dependency on foreign gas. Nevertheless, it was actually the government's fault because they were elected in 2005, with their manifesto pledging that they would create a new generation of power plants. So really, they didn't even need to promise a 'full public consultation' in the first place!
Admittedly, I haven't read the whole thread, I skimmed it and replied to the last post.Well I'm not sure if you've read the whole thread (there is a lot so probably not). But most of that is covered. Here is a small summary (of the stuff I've read)
Nah, Chernobyl was fine for it's time, but plants at that time were a lot more susceptible to human error. I'm certainly not arguing that anything like that could happen again, but I think after such an event, it's difficult to make people feel safe around what in the opinion of the general public is essentially the same; a nuclear power plant.Plants back then (with the exception of chernobyl) were incapable of doing Chernobyl. It was badly built with not much safety and it melted down because the idiots decided to fuck around with the core. It wasn't an accident, it was a full on act of stupidity.
Making it weapons grade is not as difficult a process as some people make it out to be. We pulled it off in the 40s with relatively no idea what we were doing, "terrorist organizations" would no doubt be able to make weapons from plant grade uranium if they put their mind to it. It's stupid to rule that out and even if once they obtained some uranium they were unable to turn it into a bomb, turning it into a dirty bomb requires practically no effort.The uranium used in power plants is not weapons grade.
Many solutions, but no good solutions.Probably the biggest problem of all - but there are MANY storage solutions.
yeah, you are DEFINITELY thinking of the power plant minus the mining and even that is frankly spin. A huge amount of soil has to be turned over to get a small amount of uranium and a huge amount of uranium is required to keep a plant running. If mining machinery were solar powered perhaps nuclear would be more viable.No. The Mining Uranium + Nuclear Power Generation is MUCH MUCH MUCH MUCH less polluting then Coal Mining + Coal Power Plant. In fact, I think it emits less carbon than Wind (might be wrong, might be only less then Wind if you minus the mining).
Isn't it supposed to take five years for the construction energy to be payed off? Anyway, yes, nuclear energy is very efficient matter-wise but raw materials are not the only things of value in this world.I doubt finding employees will be a problem, even if it is that's just a problem with the public perception which needs to be changed. Nuclear Plants pay themselves off with power generation pretty well.
Oh yes as finite as I think. Finite is finite. I didn't claim that there was a minute amount of it on the planet, merely that there is a limited amount, rendering it inviable in the long term. On a side note, we can see roughly the magnitude and position of all our uranium reserves. The fact that it is highly radioactive makes it a lot easier to track than most common minerals.Not as finite as you think, all those estimate for how much Uranium can sustain us for are ONLY taking in consideration current and existing uranium mines. If demand for Power Generation-Grade Uranium increases then we'll open more mines and LOOK for more possible mine locations. At the moment we're not.
General Meevious wrote:They do plenty. Perhaps you don't hear about it because government is so anti-environment that the conflict between the two is such a large focus.Does Greenpeace do anything pro-environment any more or is it all anti-government/big-business?
Do you have ANY idea how much damage GM crops have done to third world countries in the past? A considerable proportion of 3rd world debt is due to big companies in the 70s moving in to Africa with drought resistant crops to "help combat starvation". The locals started growing the crops and soon became dependant as they let their old crops die out. The companies then decided to seek reward for their "charity" and charged the people now using their patented crops, the natives had no means of paying and no means of giving up the crops, pushing them continually further into poverty. Sure GM crops are great in some cases, but corporate greed and the flaws of the patenting system are huge hindrances to moving in that direction.
Admittedly, I haven't read the whole thread, I skimmed it and replied to the last post.
Nah, Chernobyl was fine for it's time, but plants at that time were a lot more susceptible to human error.
I'm certainly not arguing that anything like that could happen again, but I think after such an event, it's difficult to make people feel safe around what in the opinion of the general public is essentially the same; a nuclear power plant.
Making it weapons grade is not as difficult a process as some people make it out to be.
It's stupid to rule that out and even if once they obtained some uranium they were unable to turn it into a bomb, turning it into a dirty bomb requires practically no effort.
A huge amount of soil has to be turned over to get a small amount of uranium
and a huge amount of uranium is required to keep a plant running.
Isn't it supposed to take five years for the construction energy to be payed off?
Oh yes as finite as I think. Finite is finite. I didn't claim that there was a minute amount of it on the planet, merely that there is a limited amount, rendering it inviable in the long term. On a side note, we can see roughly the magnitude and position of all our uranium reserves. The fact that it is highly radioactive makes it a lot easier to track than most common minerals.
Haha, everything is bound to be against the ideals of some big business. Amazon deforestation, whaling and greenhouse emissions are all a form of income for certain big businesses and to some extent certain governments, that doesn't make them right.Well I'd like to learn of some stuff they've done if this is true, perhaps my view of them is colored. Have you got any links to some major pro-environment things they've gotten involved in that couldn't be construed as anti government/big-business?
Yeah, look up 3rd world debt in Africa or something if you're genuinely interested, I've learned about it in classes so I can't give you a link off the top of my head. It's kinda off topic, but I agree, aside from the greed problems of big business and as long as it does not endanger the planet's natural life, GM is for the better.I'd like to see a source on that - I am surprised I hadn't heard of this before.
Other then that, I was referring to greenpeace and similar "eco" groups telling 3rd world countries that GM crops were poisonous and would kill you so that they would turn down free GM crops from the US government (they were successful by the way).
the project only began two years after 3 mile island and to compare the two is not really an accurate rendition of whether one was below par for the time looking at all power stations active when the accident occurred. The 3 mile island was technologically ahead, this does not mean Chernobyl was behind.Not really... Chernobyl was poorly designed in comparison to other reactors (see 3 mile island, which NOONE died because of the safety measure, and this accident happened 7 years before Chernobyl). That and the technicians were stupid.
Of course it's difficult, but they're not looking at the full picture. More people have and will die (proportionally) from wind, coal, oil, gas then nuclear.
You've tried to enrich uranium? Just because the percentage difference is large, doesn't mean the process is difficult, certainly not too difficult to completely rule out.Reactor grade uranium is 3-5% or so fissile material and weapons grade is in the high 90s. Believe me, it's not easy.
You would? You really don't believe my completely vague statement? Again, if you're so darn interested, look for a source yourself, but before you do, I would like to point out the hilarity I am encountering in your refusal to believe that the mass of non-uranium tilled in a uranium mine is substantially greater than the amount of uranium. It doesn't come in ayers rock size hunks.I'd like to see a source on that.
Firstly, "up to 98% of the fuel" is the first time around, that's not counting fuel that's already been reused. Secondly, the amount of uranium used at any one time is fairly large as I understand it. Thirdly, any loss is a loss, it's a finite resource and even if it takes a million years (which it won't by any means), it will run out eventually. There will be sunlight, wind and water movement on this earth as long as humans at least.Not really, see breeder reactors which can reuse upto 98% of the fuel. Also, think about how much energy nuclear power makes. Uranium to Useable Energy conversion is way high, meaning that a little goes a long way.
Economies don't have anything to do with it, we're talking energy usage.I imagine the figures are different for different economies. But it doesn't take very long (5 years isn't very long, at least I don't think).
My definition of short term is perhaps a little long.. though your definition of short term can't be that short given your opinion of the data that it will take five years for a nuclear power plant to pay for its self energy-wise. I don't think making solar power cost affective is really an excuse to put it off, for a start, most great advances are brought about by competition and we're talking in dollars when the health of the planet is at stake? Madness I tells ye!What I meant by "not as finite as you think" is when you claim that it is only a "short term" solution. It really depends on your definition of short term.
If your definition is "not indefinite" then sure. But nuclear can last for a VERY VERY VERY long time. At least as long enough to make solar extremely viable and efficient.
Haha, everything is bound to be against the ideals of some big business. Amazon deforestation, whaling and greenhouse emissions are all a form of income for certain big businesses and to some extent certain governments, that doesn't make them right.
Yeah, look up 3rd world debt in Africa or something if you're genuinely interested, I've learned about it in classes so I can't give you a link off the top of my head. It's kinda off topic, but I agree, aside from the greed problems of big business and as long as it does not endanger the planet's natural life, GM is for the better.
the project only began two years after 3 mile island and to compare the two is not really an accurate rendition of whether one was below par for the time looking at all power stations active when the accident occurred. The 3 mile island was technologically ahead, this does not mean Chernobyl was behind.
you're seriously grouping wind power with fossil fuels? Ok matey, tell me how many deaths have occurred directly as a result of wind power?
You've tried to enrich uranium? Just because the percentage difference is large, doesn't mean the process is difficult, certainly not too difficult to completely rule out.
You would? You really don't believe my completely vague statement? Again, if you're so darn interested, look for a source yourself,
but before you do, I would like to point out the hilarity I am encountering in your refusal to believe that the mass of non-uranium tilled in a uranium mine is substantially greater than the amount of uranium. It doesn't come in ayers rock size hunks.
Firstly, "up to 98% of the fuel" is the first time around, that's not counting fuel that's already been reused.
Economies don't have anything to do with it, we're talking energy usage.
I don't think making solar power cost affective is really an excuse to put it off, for a start, most great advances are brought about by competition and we're talking in dollars when the health of the planet is at stake? Madness I tells ye!
Solar: hugely expensive, massive space requirements, and clouds. Oh, and night has an effect.General Meevious wrote:Perhaps because nuclear energy poses many big problems.
[...]
.Lastly, but most importantly in my humble opinion, Uranium is quite, quite finite. Solar, wind and hydro energy are better long term solutions however you look at it. Nuclear power as a long term solution is a joke.
yeah, you are DEFINITELY thinking of the power plant minus the mining and even that is frankly spin. A huge amount of soil has to be turned over to get a small amount of uranium and a huge amount of uranium is required to keep a plant running. If mining machinery were solar powered perhaps nuclear would be more viable.
you're seriously grouping wind power with fossil fuels? Ok matey, tell me how many deaths have occurred directly as a result of wind power? Excluding wind, the argument you are putting forward is that nuclear energy is better than fossil fuel generated energy and that's not an argument I'm interested in. It's not a question of which of two stupid ideas is stupidest, it's a question of which of all the ideas is best renewable energy generation is part of this argument.
You've tried to enrich uranium? Just because the percentage difference is large, doesn't mean the process is difficult, certainly not too difficult to completely rule out.
Firstly, "up to 98% of the fuel" is the first time around, that's not counting fuel that's already been reused. Secondly, the amount of uranium used at any one time is fairly large as I understand it. Thirdly, any loss is a loss, it's a finite resource and even if it takes a million years (which it won't by any means), it will run out eventually. There will be sunlight, wind and water movement on this earth as long as humans at least.
Not sure what you mean here... breeder reactors make more fissile material while they use up their fuel, fast breeder reactors can make MORE fissile material then they use up.
Yakk wrote:Not sure what you mean here... breeder reactors make more fissile material while they use up their fuel, fast breeder reactors can make MORE fissile material then they use up.
Breeder reactors eventually do run out of power from a given source of fuel. Enthropy wins in the end.
General Meevious wrote:You've tried to enrich uranium? Just because the percentage difference is large, doesn't mean the process is difficult, certainly not too difficult to completely rule out.Reactor grade uranium is 3-5% or so fissile material and weapons grade is in the high 90s. Believe me, it's not easy.
Umlaut wrote:General Meevious wrote:You've tried to enrich uranium? Just because the percentage difference is large, doesn't mean the process is difficult, certainly not too difficult to completely rule out.Reactor grade uranium is 3-5% or so fissile material and weapons grade is in the high 90s. Believe me, it's not easy.
Iran isn't having any problems, right? A much more significant risk is nuclear material being refined by third world governments and sold to terrorists, and that has nothing to do with increasing nuclear energy usage is the west.
Yakk wrote:Solar/Wind requires huge amounts of infrastructure. This infrastructure requires mass raping of the environment in order to produce that much steel, concrete, wires and rare earth materials.
The volume of rape required to build and operate a nuclear power plant is small, because the plant is relatively small per terrawatt produced, and the fuel is relatively compact per terrawatt hour produced.
Yakk wrote:It is true that nuclear power has somewhat similar problems -- because the fuel for a nuclear plant is so cheap, most of the costs is from the capacity of the plant. And nuclear plants have problems rapidly changing their power output in response to demand. So you end up with a similar, but not identical, problem in aligning power supply with power demand.
One plan is to use excess nuclear produced electrical and heat power as a way of replacing the current hydrocarbon automotive fuel industry. You can get decent efficiencies doing "hot H2 production" from water, which can be stored and used to fuel cars. More simply, you can have overnight plug-in cars, who charge themselves up during the off-peak times when electricity is cheap. These can generate somewhat predictable "smoothing out" of the demand curve.
Yakk wrote:You will still need some rapid-response-to-demand power systems (like CH4 plants: aka natural gas) which are cheap-capacity expensive-fuel on-demand production to match production to demand. Or maybe you can use some of that H2 to smooth things out.

I believe the numbers were earlier in this thread. They were similar, if you assume Chernobyl is normal. If you don't, nuclear was less by three orders of magnitude.Nuclear power comes out far ahead -- I read someone who ran the numbers, and it was by at least an order of magnitude if not more.
mosc wrote:Yakk wrote:Solar/Wind requires huge amounts of infrastructure. This infrastructure requires mass raping of the environment in order to produce that much steel, concrete, wires and rare earth materials.
The volume of rape required to build and operate a nuclear power plant is small, because the plant is relatively small per terrawatt produced, and the fuel is relatively compact per terrawatt hour produced.
Nobody in their right mind is proposing wind and solar as the majority of power production for the next 50 years. Most of the plants we're talking about don't have much longer lifespans than that anyway. No, the option is not nuclear or wind/solar, it's nuclear or more coal/gas and with those two, mining uranium looks as environmentally friendly as cleaning the oil off baby penguins. People seem to rationalize power plants by thinking too long term. They don't last forever... regardless of the technology used. What we're building now doesn't have to last forever, or even 1000+ years, it has to last for the useful life of the plant.

Prole wrote:Fusion will become another viable option in another 100 years or so.
The first energy producing plant is already on the way (ITER)
though its Q factor will be quite low.
After this DEMO will be the first electricity supplying fusion power plant.
Its probably closer than people think,
Given that its plans are already in the pipeline and its been studied to death, i'd say its more likely than large scale solar harnessing (Space sails and such).
Solar will probably just become more integrated on a smaller scale.
Designed into houses etc, and farms in deserts.
General Meevious wrote:.Nuclear meltdown is still a big fear, though plants being designed these days are supposedly incapable of doing a Chernobyl.
.The idea that when dealing with highly radioactive material, there is always a chance it will fall into the wrong hands, making repeated uranium deliveries to a plant is an invitation to be hijacked and robbed.
.The half life of the substances used is many generations, people are unwilling to leave potentially quite dangerous problems to their descendants and no one wants to store the radioactive waste.
. Mining uranium is as about as damaging to the atmosphere as running a coal plant even now, when we still have readily high grade uranium available, in the future it will be much less sustainable both economically and environmentally to mine uranium.
.Nuclear power plants take a long time and a lot of money to build and it is relatively difficult to find enough willing employees in a power plant area, particularly as the prospect of building plants in urban areas sparks public outrage due to possible health risks with mismanagement.
.Lastly, but most importantly in my humble opinion, Uranium is quite, quite finite. Solar, wind and hydro energy are better long term solutions however you look at it. Nuclear power as a long term solution is a joke.
General Meevious wrote:I think after such an event, it's difficult to make people feel safe around what in the opinion of the general public is essentially the same; a nuclear power plant.
Making it weapons grade is not as difficult a process as some people make it out to be. We pulled it off in the 40s with relatively no idea what we were doing, "terrorist organizations" would no doubt be able to make weapons from plant grade uranium if they put their mind to it.
It's stupid to rule that out and even if once they obtained some uranium they were unable to turn it into a bomb, turning it into a dirty bomb requires practically no effort.
yeah, you are DEFINITELY thinking of the power plant minus the mining and even that is frankly spin. A huge amount of soil has to be turned over to get a small amount of uranium and a huge amount of uranium is required to keep a plant running. If mining machinery were solar powered perhaps nuclear would be more viable.![]()
Uranium is one of the least radioactive radionuclides there is - it's a pretty crap choice for such a weapon.
Once radioactive waste is disposed of in an appropriately designed deep geological repository, it is finished, a solved problem, and doesn't require any attention from future generations.
Prole wrote:Once radioactive waste is disposed of in an appropriately designed deep geological repository, it is finished, a solved problem, and doesn't require any attention from future generations.
Thats a bit of an ideal case i would have thought.
The words 'appropriately designed' carry a whole lot of weight in this sentence right here.
roflwaffle wrote:Should we hold existing plants and new construction to higher standards?
... but that's exactly what happened. The plants that were online automatically shut down. Two of the six weren't even online, but are still having coolant issues, just far less severe cooling issues. "Shutting down" isn't instantaneous and coolant circulation is required after the control rods fail to safe. Heck, even outside of the core, outside of the reactor entirely, they are having serious problems with the spent rod pools overheating.Yakk wrote:Ie, plants that if there is a coolant loss, the nuclear reaction stops instead of a melt-down occurring.

I don't think saying that it held in this case implies it will hold in all cases with newer designs. Apparently we should be looking at things from the perspective of something like the Mercalli Intensity scale, or better yet peak and mean acceleration along w/ a look at the resonant frequencies of a particular structure. For instance earthquakes with magnitudes as low as 6.7 have exhibited peak accelerations well over what the AP1000 was designed to take according to GE. If we're lucky the current standards we have in place are acceptable, but if we're unlucky, and in Japan's case w/ the tsunami they were certainly unlucky, we may have trouble and I don't think that's worth the risk compared to not renewing existing plants if they're in a high risk area or requiring current designs to be more robust and/or located in different areas.Azrael wrote:Higher standards than the 1971 GE Mark 1? A design that had the exact safety concerns that are currently playing out raised by GE Engineers in 1976? Yeah, probably. But hindsight is perfect, after all. Although for a containment vessel that was criticized as being too weak, it did survive a 9.0 earthquake. It was flooding of ancillary systems that caused the problem. The current damage to one of the containment buildings was as a result of the hydrogen explosion triggered by build ups after cooling failures. Sure, maybe the earthquake weakened it a bit. But it did hold.
Do we already require higher standards for new plants? Yes.
So the question becomes "should be retrofit older plants?" We probably should, on a case by case basis look at potential failure modes and what could be done to reasonably mitigate some of them. Like not putting the backup generators below sea level, assuming the sea walls will always be sufficient.
Minerva wrote:Prole wrote:Once radioactive waste is disposed of in an appropriately designed deep geological repository, it is finished, a solved problem, and doesn't require any attention from future generations.
Thats a bit of an ideal case i would have thought.
The words 'appropriately designed' carry a whole lot of weight in this sentence right here.
Well, the fission products, plutonium and other actinides created in the 16 nuclear reactors at Oklo have been successfully contained in the ground there, with no engineering involved whatsoever, for the last two billion years.
Bertrand Russell wrote:Not to be absolutely certain is, I think, one of the essential things in rationality.
Richard Feynman & many others wrote:Keep an open mind – but not so open that your brain falls out
The pros are apt to quote the quantitative whilst ignoring the qualitative aspect o' risk. Radiation's crucial interaction with biology is with DNA - the code sequence that defines all life. Damage to DNA is cumulative, transmitted between generations and o' unknown infect over substantial letters o' generations. Our present DNA has evolved under the influence o' background radiation, the effects o' acute or chronic exposure to higher levels o' radiation is unknowable and will remain so for centuries - if we are spared.
Thor is no shortage o' energy. We have more then we need now or could possibly want in the future - and its all renewable
iop wrote:I am generally positive about fission. However, even though modern reactors are very safe, the consequences of an accident (or an earthquake - see Japan) can be dire. Thus, I'd really prefer if nuclear reactors were only built in places where people don't cut corners, and where there are regular inspections by a non-corrupt international organization.
I also don't want to see breeder reactors like those in France.
Finally, so far, the problem of nuclear waste has not been solved, and given the reassurances that people want ("no leaking in x-thousand years"), it's going to be very difficult to even fulfill the technical side of things.
BTW: ignoring the fears of the "rest of the people who have no idea" is not going to be any help at all when it comes to storing nuclear waste in their backyard.
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