This communique by Jim Hansen is what defined my support for nuclear power. All emphasis, below, is mine (in bold). At the request of a mod, to shorten the length of this post, I cut out some parts about Obama's election, Coal-CCS, fossil fuel resources, and fee and dividend. While I believe Coal-CCS is usable to some small extent, I do prioritize it at the same rank as Hansen and the Nov. 3rd Workshop, lowest of all. Ideally
I also removed some parts about the environmental impacts of CO2, as many of us in E&E should be astutely aware. My unwaivering support for fee and dividend is also well known here on E&E, so I don't feel too bad cutting that out. I fully recommend reading the entire article, which is linked below. All text posted with permission of the author.
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Although global warming to date is smaller than day-to-day weather fluctuations, it has brought global temperature back to approximately the highest level of the Holocene, the past 10,000 years, the period during which civilization developed. Effects already evident include:
1. Mountain glaciers are receding worldwide and will be gone within 50 years if CO2 emissions continue to increase.
This threatens the fresh water supply for billions of people, as rivers arising in the Himalayas, Andes and Rocky Mountains will begin to run dry in the summer and fall.
2. Coral reefs, home to a
quarter of biological species in the ocean, could be destroyed by rising temperature and ocean acidification due to increasing CO2.
3.
Dry subtropics are expanding poleward with warming, affecting the southern United States, the Mediterranean region, and Australia, with increasing drought and fires.
4.
Arctic sea ice will disappear entirely in the summer, if CO2 continues to increase, with devastating effects on wildlife and indigenous people.5.
Intensity of hydrologic extremes, including heavy rains, storms and floods on the one hand, and droughts and fires on the other, are increasing.Some people say we must learn to live with these effects, because it is an almost godgiven fact that we must burn all fossil fuels. But now we understand, from the history of the Earth, that there would be two monstrous consequences of releasing the CO2 from all of the oil, gas and coal, consequences of an enormity that cannot be accepted.
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Urgency. Recent evidence reveals a situation more urgent than had been expected, even by those who were most attuned. The evidence is based on improving knowledge of Earth’s history – how the climate responded to past changes of atmospheric composition – and on observations of how the Earth is responding now to human-made atmospheric changes.
The conclusion – at first startling, but in retrospect obvious – is that the human-made increase of atmospheric carbon dioxide (CO2), from the pre-industrial 280 parts per million (ppm) to today’s 385 ppm, has already raised the CO2 amount into the dangerous range. It will be necessary to take actions that return CO2 to a level of at most 350 ppm, but probably less, if we are to avert disastrous pressures on fellow species and large sea level rise.
The good news is that such a result is still possible, if actions are prompt. Prompt action will do more than prevent irreversible extinctions and ice sheet disintegration: it can avert or reverse consequences that had begun to seem inevitable, including loss of Arctic ice, ocean acidification, expansion of the subtropics, increased intensity of droughts, floods, and storms.
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Outline of policy options. The imperative of near-term termination of coal emissions (but not necessarily coal use) requires fundamental advances in energy technologies. Such advances would be needed anyhow, as fossil fuel reserves dwindle, but the climate crisis demands that they be achieved rapidly. Fortunately, actions that solve the climate problem can be designed so as to also improve energy security and restore economic well-being.
A workshop held in Washington, DC on 3 November 2008 outlined options (presentations are at
http://www.mediafire.com/nov3workshop). The workshop focused on electrical energy, because that is the principal use of coal. Also electricity is more and more the energy carrier of choice, because it is clean, much desired in developing countries, and a likely replacement or partial replacement for oil in transportation.
Workshop topics, in priority order, were: (1) energy efficiency, (2) renewable energies, (3) electric grid improvements, (4) nuclear power, (5) carbon capture and sequestration.
Energy efficiency improvements have the potential to obviate the need for additional electric power in all parts of the country during the next few decades and allow retirement of some existing coal plants. Achievement of the efficiency potential requires both regulations and a carbon tax. National building codes are needed, and higher standards for appliances, especially electronics, where standby power has become a large unnecessary drain of energy.
Economic incentives for utilities must be changed so that
profits increase with increased energy conservation, not in proportion to amount of energy sold.Renewable energies are gaining in economic competition with fossil fuels,
but in the absence of wise policies there is the danger that declining prices for fossil fuels, and continuation of fossil fuel subsidies, could cause a major setback. The most effective and efficient way to support renewable energy is via a carbon tax (see below).
The national electric grid can be made more reliable and "smarter" in a number of ways.
Priority will be needed for constructing a low-loss grid from regions with plentiful renewable energy to other parts of the nation, if renewable energies are to be a replacement for coal.Energy efficiency, renewable energies, and an improved grid deserve priority and there is a hope that they could provide all of our electric power requirements.
However, the greatest threat to the planet may be the potential gap between that presumption (100% "soft" energy) and reality, with the gap being filled by continued use of coal-fired power.Therefore we should undertake urgent focused R&D programs in both next generation nuclear power and carbon capture and sequestration. These programs could be carried out most rapidly and effectively in full cooperation with China and/or India, and other countries.
Given appropriate priority and resources, the option of secure,
low-waste 4th generation nuclear power (see below) could be available within about a decade. If, by then, wind, solar, other renewables, and an improved grid prove to be capable of handling all of our electrical energy needs, there would be no imperative to construct nuclear plants in the United States. Many energy experts consider an
all-renewable scenario to be implausible in the time-frame when coal emissions must be phased out, but it is not
necessary to debate that matter.However,
it would be dangerous to proceed under the presumption that we will soon have all-renewable electric power. Also it would be inappropriate to impose a similar presumption on China and India. Both countries project large increases in their energy needs, both countries have highly polluted atmospheres primarily due to excessive coal use, and both countries stand to suffer inordinately if global climate change continues.
The entire world stands to gain if China and India have options to reduce their CO2 emissions and air pollution. Mercury emissions from their coal plants, for example, are polluting the global atmosphere and ocean and affecting the safety of foods, especially fish, on a near-global scale. And there is little hope of stabilizing climate unless China and India have low- and no-CO2 energy options.
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Opponents of nuclear power and carbon capture must not be allowed to slow these projects. No commitment for large-scale deployment of either 4th generation nuclear power or carbon capture is needed at this time. If energy efficiency and renewable energies prove sufficient for energy needs, some countries may choose to use neither nuclear power nor coal. However, we must be certain that proven options for complete phase-out of coal emissions are available.(...)
Nuclear Power. Some discussion about nuclear power is needed. Fourth generation nuclear power has the potential to provide safe base-load electric power with negligible CO2 emissions.
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Nuclear power plants being built today, or in advanced stages of planning, in the United States, Europe, China and other places, are just improved LWRs. They have simplified operations and added safety features, but they are still fundamentally the same type,
produce copious nuclear waste, and continue to be costly. It seems likely that they will only permit nuclear power to continue to play a role comparable to that which it plays now.
Both fast and thorium reactors were discussed at our 3 November workshop. The Integral Fast Reactor (IFR) concept was developed at Argonne National Laboratory and it has been built and tested at the Idaho National Laboratory. IFRs keep neutrons "fast" by using liquid sodium metal as a coolant instead of water. They also make fuel processing easier by using a metallic solid fuel form.
IFRs can burn existing nuclear waste and surplus weapons-grade uranium and plutonium, making electrical power in the process. All fuel reprocessing is done within the reactor facility (hence the name "integral") and many enhanced safety features are included and have been tested, such as the ability to shut down safely under even severe accident scenarios.
The Liquid-Fluoride Thorium Reactor (LFTR) is a thorium reactor concept that uses a chemically-stable fluoride salt for the medium in which nuclear reactions take place.
This fuel form yields flexibility of operation and eliminates the need to fabricate fuel elements.This feature solves most concerns that have prevented thorium from being used in solidfueled reactors. The fluid fuel in LFTR is also easy to process and to separate useful fission products, both stable and radioactive.
LFTR also has the potential to destroy existing nuclear waste, albeit with less efficiency than in a fast reactor such as IFR.
Both IFR and LFTR operate at low pressure and high temperatures, unlike today’s LWR’s.
Operation at low pressures alleviates much of the accident risk with LWR. Higher temperatures enable more of the reactor heat to be converted to electricity (40% in IFR, 50% in LFTR vs 35% in LWR). Both IFR and LFTR have the potential to be air-cooled and to use waste heat for desalinating water.Both IFR and LFTR are 100-300 times more fuel efficient than LWRs. In addition to solving the nuclear waste problem, they can operate for several centuries using only uranium and thorium that has already been mined. Thus they eliminate the criticism that mining for nuclear fuel will use fossil fuels and add to the greenhouse effect.The Obama campaign, properly in my opinion, opposed the Yucca Mountain nuclear repository.
Indeed, there is a far more effective way to use the $25 billion collected from utilities over the past 40 years to deal with waste disposal. This fund should be used to develop fast reactors that consume nuclear waste, and thorium reactors to prevent the creation of new long-lived nuclear waste. By law the federal government must take responsibility for existing spent nuclear fuel, so inaction is not an option. Accelerated development of fast and thorium reactors will allow the US to fulfill its obligations to dispose of the nuclear waste, and open up a source of carbon-free energy that can last centuries, even millennia.It is commonly assumed that 4th generation nuclear power will not be ready before 2030. That is a safe assumption under "business-as-usual." However, given high priority it is likely that it could be available sooner.
It is specious to argue that R&D on 4th generation nuclear power does not deserve support because energy efficiency and renewable energies may be able to satisfy all United States electrical energy needs. Who stands ready to ensure that energy needs of China and India will be entirely met by efficiency and renewables?China and India have strong incentives to achieve pollution-free skies as well as avert dangerous climate change. The United States, even if efficiency and renewables can satisfy its energy needs (considered unlikely be many energy experts), needs to deal with its large piles of nuclear waste, which have lifetime exceeding 10,000 years.
Development of the first large 4th generation nuclear plants may proceed most rapidly if carried out in China or India (or South Korea, which has a significant R&D program), with the full technical cooperation of the United States and/or Europe. Such cooperation would make it much easier to achieve agreements for reducing greenhouse gases.
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Prompt development of safe 4th generation nuclear power is needed to allow energy options for countries such as China and India, and for countries in the West in the event that energy efficiency and renewable energies cannot satisfy all energy requirements.Deployment of 4th generation nuclear power can be hastened via cooperation with China, India and other countries.
It is essential that dogmatic ‘environmentalists’, opposed to all nuclear power, not be allowed to delay the R&D on 4th generation nuclear power. Thus it is desirable to avoid appointing to key energy positions persons with a history of opposition to nuclear power development. Of course, deployment of nuclear power is an option, and some countries or regions may prefer to rely entirely on other energy sources, but opponents of nuclear power should not be allowed to deny that option to everyone.
Coal is the dirtiest fuel. Coal burning has released and spread around the world more than 100 times more radioactive material than all the nuclear power plants in the world. Mercury released in coal burning contaminates the world ocean as well as our rivers, lakes and soil. Air pollution from coal burning kills hundreds of thousands of people per year. If such consequences were occurring from nuclear power, nuclear plants would all be closed. Mining of coal, especially mountaintop removal, causes additional environmental damage and human suffering. It is time for all the coal plants to be closed, indeed, averting climate disasters demands that all coal emissions be phased out.
Coal is best left in the ground.(...)
No time remains for a transition via ineffectual half measures. Frank communication with the public is essential. At present, all around the world, many governments are guilty of greenwash, an implausible approach of goals and halfmeasures that will barely slow the growth of CO2. The world, not just the United States, needs an open honest discussion of what is needed. It is a tremendous burden to place on the President-elect. The only chance seems to be if he understands the truth – the whole truth. Young people realize that they, their children, and the unborn will bear the consequences of our actions or inactions. They do not blame their parents, who legitimately ‘did not know’ what they were starting. Young people worked hard to influence the democratic process. Now they expect appropriate actions.
My thoughts. This paper convinced me that if we cannot get renewables to make a big dent in to things, then we need to look at alternatives that can work.
">Energy efficiency is the single most important thing we need to work on. Waxman-Markey, which passed the house, likely won't get a vote for 2 years or more, but it would've reduced the United States' electrical consumption by a factor of 100 nuclear power plants. That is, we could drop 100 or more coal plants in the United States simply by using those efficiency standards. In the intrim we should be building out renewables, but renewable plants have been highly dependent on subsidies and investors. Without
">further investment they could stall for quite a few years. No
">industry is exempt. So from my point of view, if we're going to be serious about climate change, we need to focus on Gen IV nuclear power, for the reasons that Jim outlined above. It will help us burn up our waste, it won't require mining new fuel for quite some time, and overall, will allow us to make up a significant portion of our electrical portfolio with a low carbon emitting energy source. As Kirk Sorenson points out, the three biggest polluting countries in the world (US, India, China) already have the nuclear bomb, thus "proliferation risk" as it stands with those countries is a joke that only greenwashing non-environmentalists would use. What is important now, as ever, is that we remove ourselves from CO2 emissions as soon and as readily as possible.
I don't support, however, the building of any more Gen III+ reactors, past the end of the decade, because that money could be better spent on Gen IV reactors which could be developed in the coming decade. If renewable energy cannot meet our demands we will be in big trouble environmentally speaking. We need
. Dogmatically sticking to one type of energy source is not a "solution."