“The Case for Terrestrial (a.k.a. Nuclear) Energy” (2 of 2)
As Common Sense Authors have done in the past, we want to share an article with you we came across recently. It is actually the transcript of a speech delivered by William Tucker, a veteran journalist who spoke at Hillsdale College on January 29, 2008, during a conference on “Free Markets and Politics Today.” Mr. Tucker’s work has appeared in the Atlantic Journal, the Weekly Standard, National Review and Reader’s Digest among many other publications. His articles have won the John Hancock Award, the Gerald Loeb Award and the Amos Tuck Award among others. He has also published several books of which The Excluded American: Homelessness and Housing Policies has won the Mencken Award. Due to its length, we will reprint this speech in two parts with the following proviso: “This reprint is with the permission from Imprimis, the national speech digest of Hillsdale College, www.hillsdale.edu.”
The following is the second part of William Tucker’s speech:
Nuclear or Terrestrial EnergyThere is one other form of alternative energy often mistakenly grouped with solar: geothermal energy. Geothermal is produced when the natural heat of the earth comes in contact with groundwater. This can produce geysers and “fumaroles”—steam leaks that are now being harnessed to produce electricity.Where does this heat come from? Temperatures at the earth’s core reach 7,000 degrees Centigrade, hotter than the surface of the sun. Some of this heat comes from gravitational pressures and the leftover heat from the collisions of astral particles that led to the formation of the earth. But at least half of it (we don’t know the precise percentage) comes from the radioactive breakdown of thorium and uranium within the earth’s mantle. This is “terrestrial energy,” and a nuclear reactor is simply the same process carried out in a controlled environment. In order to harness terrestrial energy in the form of uranium isotopes, we mine it, bring it to the surface, concentrate it, and initiate a chain reaction that releases stored energy in the form of heat—the very same process as that used to harness solar energy from coal.
When Albert Einstein signed the letter to President Roosevelt informing him of the discovery of nuclear energy, he turned to some fellow scientists and said: “For the first time mankind will be using energy not derived from the sun.” This possibility emerged in 1905, when Einstein posited that energy and matter are different forms of the same thing and that energy could be converted to matter and matter to energy (as reflected in the famous equation E = mc2). The co-efficient, c2, is the speed of light squared, which is a very, very large number. What it signifies is that a very, very small amount of matter can be converted into a very, very large amount of energy. This is good news in terms of our energy needs and the environment. It means that the amount of fuel required to produce an equivalent amount of energy is now approximately two million times smaller.
Consider: At an average 1,000 megawatt coal plant, a train with 110 railroad cars, each loaded with 20 tons of coal, arrives every five days. Each carload will provide 20 minutes of electricity. When burned, one ton of coal will throw three tons of carbon dioxide into the atmosphere. We now burn 1 billion tons of coal a year—up from 500 million tons in 1976. This coal produces 40 percent of our greenhouse gases and 20 percent of the world’s carbon emissions.
By contrast, consider a 1000 megawatt nuclear reactor. Every two years a fleet of flatbed trucks pulls up to the reactor to deliver a load of fuel rods. These rods are only mildly radio-active and can be handled with gloves. They will be loaded into the reactor, where they will remain for six years (only one-third of the rods are replaced at each refueling). The replaced rods will be removed and transferred to a storage pool inside the containment structure, where they can remain indefinitely (three feet of water blocks the radiation). There is no exhaust, no carbon emissions, no sulfur sludge to be carted away hourly and heaped into vast dumps. There is no release into the environment. The fuel rods come out looking exactly as they did going in, except that they are now more highly radioactive. There is no air pollution, no water pollution, and no ground pollution.
Objections to Nuclear Energy
What are the potential problems with nuclear power?
First, some fear that a nuclear reactor might explode. But this is impossible. Natural uranium is made of two isotopes—U-235 and U-238 (the latter having three more neutrons). Both are radioactive—meaning they are constantly breaking down into slightly smaller atoms—but only U-235 is fissile, meaning it will split almost in half with a much larger release of energy. Because U-235 is more highly radioactive, it has almost all broken down already, so that it now makes up only seven-tenths of a percent of the world’s natural uranium. In order to set off a chain reaction, natural uranium must be “enriched” so that U-235 makes up a larger percentage. Reactor grade uranium—which will simmer enough to produce a little heat—is three percent U-235. In order to get to bomb grade uranium—the kind that will explode—uranium must be enriched to 90 percent U-235. Given this fact, there is simply no way that a reactor can explode.
On the other hand, a reactor can “melt down.” This is what happened at Three Mile Island. A valve stuck open and a series of mistakes led the operators to think the core was overflowing when it was actually short of cooling water. They further drained the core and about a third of the core melted from the excess heat. But did this result in a nuclear catastrophe? Hardly. The public was disconcerted because no one was sure what was happening. But in the end the melted fuel stayed within the reactor vessel. Critics had predicted a “China syndrome” where the molten core would melt through the steel vessel, then through the concrete containment structure, then down into the earth where it would hit groundwater, causing a steam explosion that would spray radioactive material across a huge area. In fact, the only radioactive debris was a puff of steam that emitted the same radiation as a single chest x-ray. Three Mile Island was an industrial accident. It bankrupted the utility, but no one was injured.
This of course was not the case in Chernobyl, where the Soviet designers didn’t even bother building a concrete containment structure around the reactor vessel. Then in 1986, two teams of operators became involved in a tussle over use of the reactor and ended up overheating the core, which set fire to the carbon moderator that facilitates the chain reaction. (American reactors don’t use carbon moderators.) The result was a four-day fire that spewed radioactive debris around the world. More fallout fell on Harrisburg, Pennsylvania, from Chernobyl than from Three Mile Island. With proper construction such a thing could never happen.
Another objection to nuclear power is the supposed waste it produces. But this is a mischaracterization. A spent fuel rod is 95 percent U-238. This is the same material we can find in a shovel full of dirt from our back yards. Of the remaining five percent, most is useful, but small amounts should probably be placed in a repository such as Yucca Mountain. The useful parts—uranium-235 and plutonium (a manmade element produced from U-238)—can be recycled as fuel. In fact, we are currently recycling plutonium from Russian nuclear missiles. Of the 20 percent of our power that comes from nuclear sources, half is produced from recycled Russian bombs. Many of the remaining isotopes are useful in industry or radiological medicine—now used in 40 percent of all medical procedures. It is only cesium-137 and strontium-90, which have half-lives of 28 and 30 years, respectively, that need to be stored in protective areas.
Unfortunately, federal regulations require all radioactive byproducts of nuclear power plants to be disposed of in a nuclear waste repository. As a result, more than 98 percent of what will go into Yucca Mountain is either natural uranium or useful material. Why are we wasting so much effort on such a needless task? Because in 1977, President Carter decided to outlaw nuclear recycling. The fear then was that other countries would steal our plutonium to make nuclear bombs. (India had just purloined plutonium from a Canadian-built reactor to make its bomb.) This has turned out to be a false alarm. Countries that have built bombs have either drawn plutonium from their own reactors or—as Iran is trying to do now—enriched their own uranium. Canada, Britain, France and Russia are all recycling their nuclear fuel. France has produced 80 percent of its electricity with nuclear power for the last 25 years. It stores all its high-level “nuclear waste” in a single room at Le Havre.
ConclusionThe U.S. currently gets 50 percent of its electricity from coal and 20 percent from nuclear reactors. Reversing these percentages should become a goal of both global warming advocates and anyone who wants to reduce America’s dependence on foreign oil (the latter since a clean, expanded electrical grid could anchor a fleet of hydrogen or electric cars). Contrary to what some critics charge, this would not require massive subsidies or direct intervention by the government. Indeed, the nuclear industry has gone through an astounding revival over the past decade. The entire fleet of 103 reactors is up and running 90 percent of the time. Reactors are making money hand-over-fist—so much so that the attorney general of Connecticut recently proposed a windfall profits tax on them! The industry is poised for new construction, with proposals for four new reactors submitted to the Nuclear Regulatory Commission and almost 30 waiting in the wings.The rest of the world is rapidly moving toward nuclear power. France, Russia and Japan are not only going ahead with their own nuclear programs, but selling their technology in the developing world. America, which once dominated this technology, is being left behind. The main culprit is public fear. Nuclear technology is regarded as an illegitimate child of the atomic bomb, a Faustian bargain, a blasphemous tinkering with nature. It is none of these. It is simply a natural outgrowth of our evolving understanding of the universe. The sun has been our prime source of energy throughout human history, but energy is also generated in the earth itself. It is time to avail ourselves of this clean, safe terrestrial energy.