Sunday, January 20, 2008

Problems with Using Nuclear Energy

By Karel Kosman

In principle, nuclear energy, whose share of covering the world's energy needs presently amounts to around 5%, is one of the best methods how we can presently produce energy. Even so, this form of energy has many great risks for mankind and the environment.

The wasteful consequences of nuclear energy is not only in its military use, as was proven following the atomic bomb dropped on the Japanese cities of Hiroshima and Nagasaki. But, as was shown in the nuclear power plant accident in Chernobyl in 1986, the peaceful use of nuclear energy also carries with it its unexpected risks. Not only did thousands of people die immediately following the reactor's failure but also due to the cancer illnesses clearly resulting from this accident. Besides this, there is a clear rise in the number of miscarriages and birth defects in the area surrounding Chernobyl. At that time, a radioactive cloud engulfed all of Europe. Although the consequences of this accident were not directly visible in all parts of Europe, increased amounts of radiation were observed in many locations.

To avoid such an accident from taking place in the future, some countries have decided to stop producing nuclear energy outright. Furthermore, many residents living near border regions neighbouring countries still operating or building nuclear power plants are protesting against it.

It can be generally stated that, even in light of many safety and preventive measures, the use of nuclear energy has many risks hidden within it in that dangerous situations can occur at all locations along its fuel circuit. The risks involved do not only relate to, as it is often erroneously believed, the actual fusion process, the storage of uranium or its recycling and transport but also on the mining of uranium and the creation of radioactive dumpsites. The biproducts of nuclear fission, such as radioactive radon gas created from waste containing remains of radium, leads to greater occurrences of lung cancers, evident with miners or residents living near radioactive waste dumps.


Nuclear Energy - The Green Solution

by JOHN WOOLF

The United States with less than 5% of the world's population consumes roughly 25% of the world's energy. Some might argue that this is egregious, while others would say that it is simply a yardstick by which the world's largest economy is measured. But for whatever the reason for our vast consumption of energy, the fact remains that in order to consume you first have to produce. And as most of our energy comes from burning fossil fuels- which wouldn't be too bad except that:

(1) burning vast amounts of fossil fuels in this county alone dumps millions of pounds of earth warming greenhouse gasses into, what appears, is a fragile atmosphere, every day. Just warming up the atmosphere a couple of degrees on average has significant impact. Look no further than last year's hurricane season. The worst on record. And...

(2) let's not forget its close cousin; smog pollution, which adds to respiratory problems and other health conditions, not to mention the visual blight hanging over our cities as well. In addition...

(3) have you filled your tank recently? Paid the heating bill? The cost of all fossil fuels, even coal has increased significantly. As other emerging economies such as China and India vie for ever more limited resources, all bets are that the costs will continue to climb over the long haul. Moreover...

(4) as we import most of our oil nowadays- we are increasingly held hostage to an unstable supply from a number of countries that we, for whatever reasons, are increasingly unpopular with. The end game? If our supply of oil is not first arbitrarily cut off, as it becomes increasingly scarce the price will rise until our growth is strangled. In either case we will feel impelled to engage in war with other rising powers to secure our supplies.

The bottom line: Fossil fuels are not only hazardous to our health (and the planet's) but may in fact be hazardous to the American way of life.

But if energy is the lifeblood of our economy what are we to do? Wind? Solar? While anything we can do other than consume fossil fuels will help, these sources of energy are relatively diffuse and inconsistent. In other words, their "cost to calorie" ratios are not efficient and they are not always dependable. As James Kunstler points out in his intriguing book The Long Emergency, one of our best options out of these dilemmas is to do an "Apollo Project" type effort to develop additional, new nuclear energy capability. As it turns out, it just may be the greenest, viable alternate we have.

The U.S. currently produces about 20% of its electrical power from nuclear power. The advantages are; that there are no greenhouse emissions into the atmosphere, no visual pollution, it is cost relatively cost effective, quiet and we have sufficient supply of uranium here at home for the foreseeable future to provide for a major portion of our energy needs. Historically, at least, the problem with nuclear energy has been primarily two fold. First, the "China Syndrome" problem of a meltdown of a reactor which could release a large amount of radioactivity and second, what do we do with nuclear waste material that has a half-life of over 25,000 years! The perception of these two significant obstacles might doom a new nuclear drive and stand in the way of an energy-independent United States.

However, there are new technologies in this field that, like the cavalry, have come to our rescue- and none too soon. First, there is a new class of nuclear reactors that have their nuclear fuel so structured that they cannot do a melt down. Turn off the cooling to this new nuclear reactor and it only gets a bit hotter. No big deal. Turn the cooling back on and it runs more efficiently. Okay, one down. But what about all that radioactive spent reactor fuel? Let's see if we can put some perspective on it. If you gathered all the spent nuclear fuel in this country under one roof it would fill a typical high school gym. Not too unmanageable. Moreover, the spent fuel is encapsulated in super strong glass beads, which in turn are embedded into hardened concrete inside steel drums. This makes the waste product "transportable" and is designed to withstand the elements for 10,000 years. Nevertheless, even in it's tomb it is still relativity radioactive. Most of these drums are stored in water as radiation cannot penetrate more than about 3 feet of water. However, no one seems anxious to have it in their back yards. A political hot potato to be sure.

But while our politicians don't have the answer, the earth does. The answer lies in the bottom of the Marianas Trench in the Pacific. It is the deepest place in the ocean (over seven miles) and one of the fastest moving subduction plates on earth. If the drums of waste were placed in the bottom of the trench, they would, within a few hundred years, be swallowed up into the bowels of the earth and blend into the earth's core where heat and pressure (caused in part by radioactive substances contained within the earth) rendered insignificant.

Given the current geopolitical situation, which only seems to be working to our disadvantage, limited resources for cheap fossil fuels, not to mention the environmental impacts we are starting to experience, it is time we take drastic measures to get us off our fossil fuel addition. Let's hope we are not too late.

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John Woolf is the founder of several successful Internet technology companies including the Book Price Comparison website CompareBook.com. As a pragmatist of the world around him, he is both a critic and crusader on international politics and energy policy as it relates to our security and our impact on the global environment.

Visit CompareBook.com to read reviews, find similar titles, and search for the lowest possible price for The Long Emergency and other great books.

Related Articles - Energy, Nuclear Energy, Oil, Environment, Green, Book, Book Review,

Friday, January 18, 2008

An Overview of Nuclear Energy

By Richard Chapo

In the effort to get away from our oil and coal dependency, nuclear energy is getting attention again. Here is an overview of nuclear energy.

Harnessing a chemical reaction at the nuclear level of certain materials produces nuclear energy. The process is known as nuclear fission.

Nuclear fission occurs when certain materials, such as uranium, are manipulated in a manner that causes them to decay quickly. A byproduct of this decal is immense amounts of heat. The heat is then typically used to turn turbines much as occurs in hydropower dams. The spinning turbines produce electricity, which is then used for commercial applications and propelling naval vessels such as submarines.

The largest known nuclear reaction can be seen everyday in the sky. The sun is essentially a nuclear reaction, but on a much larger scale than we could ever replicate. It does not blow up because of its immense gravity. It does, however, shoot off massive solar flares which contain more energy than we could use in years.

Nuclear energy is a popular subject with governments because it produces a lot of energy with relatively small resource requirements. Countries such as Russia, France and China have invested heavily in nuclear energy production. There are, however, significant problems with nuclear energy.

Nuclear fission is a fairly unstable process. Energy is produced by speeding up and slowing down the decay process. Essentially, it is a balancing act. Allow the decay to happen to quickly and your risk a meltdown. Although meltdowns are rare, they are absolutely devastating when they occur.

The best known nuclear disaster was Chernobyl in 1986. Located in the Ukraine, the individuals controlling the reactor attempted an ill-advised test. Blame has been put on the controllers and the basic design of the plant, but nobody is really sure as to the exact cause. What is known is control was lost and the nuclear fission went to fast. Huge steam explosions occurred followed by a full nuclear meltdown. A huge radioactive cloud escaped and dropped radioactive material over much of Eastern Europe. 330,000 people around the reactor had to be evacuated. Thousands died immediately. Hundreds of thousands, if not millions, of people have suffered health problems. Birth defects are a sad, regular occurrence. All and all, the meltdown produced 300 times the radioactive material produced in the two bombs dropped on Japan at the end of the Second World War.

Nuclear energy is a very efficient way to produce energy, but one that is extremely devastating when it goes wrong. All and all, we are better off finding another platform for our energy needs.

Rick Chapo is with SolarCompanies.com, a directory of solar energy companies. Visit us to read more articles on renewable energy.

Tuesday, January 8, 2008

Can Nuclear Energy Save You From Global Warming?

By Erik Leipoldt

Just imagine a world with abundant energy, enabling you to live the good life forever... Isn't that what most of us crave? Nuclear energy is magic isn't it?

Nuclear energy has no greenhouse gas emissions. The latest technology has made it safe and we can bury nuclear waste without worrying about radiation. Business as usual without doing any harm.

Perfect!

Well, is it?

Nuclear energy is magical thing. It's hard to understand how it works and it's easy to get bamboozled by claims made by the nuclear magicians – scientists – as well as by opponents.

Take veteran environmentalist Dr James Lovelock, of GAIA fame who says only nuclear energy can save us from global warming. Or Dr Helen Caldicott who says it's too dangerous and we do not need it.

And governments ... Well, depends on who you talk to.

Your life is full already without figuring out what is valid and what's not. Right?

Easier to just leave it to "Them."

But stop!

Find out the facts on nuclear energy and nuclear radiation hazards. Then make up your mind – and next time there is an election you vote with some knowledge under your belt. There is plenty of information out there to help you make up your mind and I'll give you a leg-up.

So, here is an easy framework. Imagine experiencing a certain “knowing”about this important issue on your way to the ballot box, or in talking with your friends.

Given that global warming is a real threat, and global energy demand is ballooning, then the nuclear energy debate is essentially about four Big Issues.

1) Can nuclear energy deliver on a low-emission or even non-emission basis?
2) Is nuclear energy for electrical power purposes safe?
3) Can it be delivered at a reasonable cost?
4) How does it compare with other low-emission alternate energy sources?

Here is an overview only of those issues. But don't just take my word for it. Find out more yourself!

Emissions

  • Yes, nuclear energy is emission-free if you just measure the exhausts from a reactor's chimney.
  • In one study, nuclear energy came close to wind power in low emissions over its lifetime.
  • There is no air pollution, with big nuclear energy user France having the cleanest air in Europe.
  • No, it is not emission-free and is a greenhouse gas emitter, when measuring mining of uranium and transporting it, building and decommissioning nuclear power plants.

Safe?

  • Chernobyl still stands the only disastrous accident with a nuclear power plant, and the antiquated structure and action taken after the “melt-down” bears much blame.
  • Any safeguards are only as good as the people that manage them, and any further accident will be one too many.
  • Modern nuclear power plant structures are much safer.
  • A terrorist attack, using radioactive material in a dirty bomb cannot be excluded.
  • A terrorist attack using an airplane could be disastrous, even though deactivating a modern nuclear plant can be done in 5 seconds.
  • A higher-than-normal incidence of childhood leukemia has been reported near power plants in the UK, France and Germany.
  • So-called Generation IV nuclear reactors, including "fast breeders" are said to be cleaner (low radiation level waste), cheaper and safer but the first will not be ready before 2010, some not until 2030.

Cost

  • Economics of nuclear energy is a wobbly concept, depending on the assumptions about other energy sources and their end costs.
  • Nuclear reactors currently have very high start-up and close-down costs compared to other low-emission, and renewable energy sources.
  • Costs are more than just counting money.

Comparison to low-emission energy sources

  • You'll find many studies with different results.
  • One must take into account the urgent threat presented by global warming, that of radioactive energy, and appraise the benefits of energy-wise living and currently available renewable energy sources.

The magical attraction of nuclear energy remains: throw enough money at it and all our problems will seem to go away. But the future is most likely one of a diversified use of renewable energy with some nuclear energy. It's a question of where to put the emphasis.

Nuclear energy sources removes people even further from tangible "natural" processes. More of the same kind of thinking that caused our global warming problems in the first place. Why not emphasize responsible energy use, and the use of the Great Big Nuclear Reactor In The Sky to drive wind, tidal and solar energy. And to try and live in harmonious relationship with each other and our environments.

But you just have to make up your own mind. My children's future and yours depend on you. Only your personal attitude – the greatest energy source we know – can help you live with global warming. And we are going to have to live with it for a long, long time.

Dr Erik Leipoldt has long been concerned about the effects of global warming. In particular he uses his own experience of severe disability in practical approaches towards alternate energy sources to survive and thrive in our environmentally disabled world.

See http://www.alternate-energy-sources.com/

Wednesday, January 2, 2008

Asia Leads Way In Nuclear Power Development

Asia Leads Way In Nuclear Power Development

30 October 2007 | With 18 of the 31 reactors now being built located in Asia and more in the planning, Asian nations are at the forefront of the renewed interest in nuclear power generation according to the findings of a newly-released IAEA report. Full Story »

PACT

Special Event Launches New Partnership

24 October 2007 | IAEA Director General Mohamed ElBaradei will join more than 100 leading public figures, philanthropists and cancer experts at the UN Headquarters in New York on 29 October to mark the launch of a new partnership between the IAEA and the US-based National Foundation for Cancer Research (NFCR). Press Release »

Nuclear Power

Nuclear Power Worldwide: Status and Outlook

23 October 2007 | Nuclear power's prominence as a major energy source will continue over the next several decades, according to new projections made by the IAEA, which has just published a new report, Energy, Electricity and Nuclear Power for the period up to 2030. Press Release » :: Nuclear Power in Focus »

Mohamed Elbaradei and Bob Geldoff

IAEA Chief Outlines Vision for Global Security

17 October 2007 | In a speech delivered at the fifth annual Hindustan Times Leadership Summit in New Delhi, India, IAEA Director General Mohamed ElBaradei said that the current situation of global insecurity can only be addressed through "an adjustment of our mindset, and a change in our values" leading to a new global security thinking. Full Story » :: Read Statement »