Thursday, May 1, 2008

Current Day Implications

Nuclear waste is a big problem and it doesn't stop being dangerous for long. "Currently, only temporary storage areas exist for the disposal of radioactive waste. The U.S. government is working to devise a plan for the safe storage and permanent disposal of nuclear wastes." (http://www.etsu.edu/writing/3120f99/zctb3/nuclear2.htm#nw4, 05/01/08) Even though there are over 100 nuclear power plants in the US alone (which is about 1/4th of the total in the world), they still have not found a proper way to dispose of nuclear waste. The only actual method used now is just storing it temporarily. The material will continue to emit radioactive particles even after it has been made into waste. Sometimes high level waste emits radioactive particles more than a hundred thousand years. e
Radioactive waste is a substance that there is a lot to dispose of in the United States. "What's to be done with 52,000 tons (47,000 metric tons) of dangerously radioactive spent fuel from commercial and defense nuclear reactors? With 91 million gallons (345 million liters) of high-level waste left over from plutonium processing, scores of tons of plutonium, more than half a million tons of depleted uranium, millions of cubic feet of contaminated tools, metal scraps, clothing, oils, solvents, and other waste? And with some 265 million tons (240 million metric tons) of tailings from milling uranium ore—less than half stabilized—littering landscapes?"(http://ngm.nationalgeographic.com/ngm/0207/feature1/index.html#, 05/01/08) Even if the other 312 million tons of spent fuel and machinery for mining and refining uranium, theres still 91 million gallons of waste which will have a chance of lasting up to (if not longer than) 100,000 years. The low level waste stops being bad after 10-50 years, and this can be stored for the relativley short amount of time that it needs to deteriorate. However this is not the case for high level radiation. Overall, there are 114 sites that need cleanup from nuclear material.
But, temporary storage is unsafe. "As the plutonium is broken down, plutonium dust is created which presents a relevant safety concern. If this dust were dispersed into the atmosphere, radioactive plutonium could spread quickly and easily through the environment, creating a very dangerous hazard to humans and the environment."(http://www.etsu.edu/writing/3120f99/zctb3/nuclear2.htm#nw4, 05/01/08). If the dust manages to escape while being stored, it can be a hazard to the environment. This is the most common method among storing radioactive material.
However, there are a few options being considered to use for the disposal of radioactive material. "A few options are being considered for the permanent disposal of nuclear waste, including: the mixed oxide (MOX) fuel burning method, the vitrification method and the Subductive Waste Disposal Method."(http://www.etsu.edu/writing/3120f99/zctb3/nuclear2.htm#nw4, 05/01/08) They are considering a few options for the permanent disposal of nuclear waste. However none of these methods are actually efficient and safe. The mixed oxide fuel burning method mixes plutonium with uranium and the object of this is to create energy through nuclear fission, thus reducing the amount of plutonium and making it less usable, especially for weapons. However the byproduct of this still needs to be disposed of properly to ensure it is not used for weapons or a danger to the environment. The vitrification method mixes plutonium with radioactive waste and then placing this mixture in glass containers. It would then be buried and be safe from the environment and from being mined for use. However it is possible it could leak out if it is not stored properly, or be salvaged for the use of nuclear weapons. The subductive waste disposal method calls for the waste to be put into one of the subductive plates of the earth where it would be carried into the center of the earth and become physically and chemically altered from its original state. This is the only method that is safe for the environment and from re-utilization of the material. The only problem is if the waste were to escape under water, it could damage the environment badly.
But even though there are many different methods for the storage and eradication of nuclear waste, there are many cases where the material leaks out into the environment, such as in Hanford, Washington.
"Cleanup to a nationally accepted level will likely take until at least 2030 and cost at least $50 billion total."(A River Damned, Nat Geo, Hanford from www.wikipedia.org, 05/01/08) This is a good example of how hard it is to clean up nuclear waste. The area surrounding the Hanford waste site is seriously damaged, and if they had a proper way to dispose of the waste, we wouldn't have this problem. But the surrounding area was damaged by over 133 million cubic meters on land and 1.3 trillion liters went into the water and the soil. However, temporary storage seems to be the only easy way to get rid of nuclear waste.
However, nuclear waste isn't the only dangerous thing coming out of power plants. "We already know that the containment domes on many of the reactors in the United States would not prevent the release of radiation during an meltdown accident." (www.greenpeace.org, 05/01/08) Because the way the nuclear power plants were built, they are unsafe if there is an accident. This poses a threat to the community it supports with energy and the workers inside the reactor. If the radiation did spill out, it would hurt life forms living near it with an explosion or radiation and ruin the environment.
A good example of what could happen is Chernobyl. The World Health Organization reviewed after the reactor exploded and radioactive particles went into the atmosphere. "However, the study by the WHO, that this claim is based on, forecasts 8930 fatalities. "And when one then reviews the reference given in WHO report, one arrives at 10,000 to 25,000 additional deaths due to cancer and leukemia", says Pflugbeil."(http://www.ippnw-students.org/chernobyl/research.html, 05/01/08) The Chernobyl incident not only killed a number of people in the surrounding area, but it spread to other people and caused deaths, which took longer. The reactor exploded due to a power surge and then some of the equipment around it set fire. This is a good example of how radiation can affect a community.

Even though a meltdown hasn't happened recently, that doesn't mean we haven't come close. "We've had nearly 200 near misses at U.S. reactors. Of those, the federal government has concluded that at least 8 were highly significant. In fact, in Ohio just a few years ago, we came so close to a nuclear meltdown that if the reactor had operated for as little as a week or two more, you would have had a meltdown that rivaled 3 Mile Island"(www.greenpeace.org, 05/01/08) This shows that the reactors really aren't safe. Even though they didn't have a total meltdown, it still came really close to something that could have been disastrous. How many near misses need to happen before there's an actual meltdown?
Though there may have been a number of near misses recently, the United States is still dependent on nuclear power. "There are 103, soon to be 104, nuclear plants in the United States, each of which puts hundreds of thousands of people at risk in the event of a meltdown, or of a terrorist attack. Undeterred, the nuclear industry is attempting a comeback, arguing that nuclear energy is vital to address global warming." (www.greenpeace.org, 05/01/08) The people who live near power plants are in danger of not only a meltdown.

It seems that people are trying to use nuclear power to combat global warming, it is not the most effective way to combat it. "Every dollar you spend on energy efficiency in renewable goes 7 to 10 times further than a dollar spent on nuclear power at displacing global warming gases."(www.Greenpeace.org, 05/01/08 Even though nuclear energy reduces the amount of greenhouse gases emitted in the atmosphere, there are other ways to produce energy more efficiently and safer than nuclear energy. There is significantly less hazardous waste produced from other renewable sources such as wind, water, and solar power.
However global warming isn't the only concern among countries that need energy. "Although diversification is a noble goal, the operation of nuclear power plants is highly complicated. Safety alone should encourage Ukraine to use nuclear fuel for which its nuclear power plants were designed, i.e. fuel made in Russia." (http://en.rian.ru/analysis/20080402/102834109.html, 05/01/08) Ukraine has recently made a major mistake in the running of their nuclear power plants. They are planning to import nuclear fuel from the United States, even though the reactors were designed for Russian nuclear fuel. This could potentially cause a lot of problems and even a meltdown. This shows that some governments see the need for energy greater rather than safely finding a way to get energy without having to spend more money.

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Social Context

After the USSR fell, there were a number of nuclear weapons and nuclear materials that went missing. "The third threat, which has evolved because of the growth of the crime rate and possible disasters at industrial and energy facilities, includes the smuggling of drugs, guns and radioactive materials, and the illegal transportation of certain other goods. There are also many people from the former Soviet Union, with a number of criminals among them, who are trying to emigrate illegally to Western countries. Finally, there is the threat posed by the transit of dangerous and radioactive materials through our territory."(http://www.nato.int/docu/review/1993/9301-2.htm, 05/01/08) Because uranium and plutonium are both radioactive materials that can be used to make nuclear weapons, they could have been talking about one of those substances. However, any radioactive material is dangerous to humans and even if they were not able to create an actual nuclear weapon, they would still be able to make a "dirty bomb", which in essence might be a bomb that may or may not detonate, but is used to spread radiation over a large area.
The danger of radioactive materials doesn't just lie with criminals getting their hands on plutonium. "The attorneys general are specifically concerned that the NRC's relicensing procedures do not require the effective evaluation of plants for vulnerability to terrorist attacks or natural disasters, such as earthquakes. The letter calls on the NRC to take action to update its relicensing procedures as the nation's oldest plants – first licensed in the 1960s and 1970s – are approaching the expiration of their initial 40-year license." (Ziegler, http://www.ag.state.il.us/pressroom/2007_11/20071115.html, 05/01/08) The people who are supposed to give licenses out to nuclear power plants don't have the proper evaluation techniques for the safety of the plant and the residents who live near it. This is surprising because after the September 11th attacks, it seemed like they would up the security at these places, or at least make the licensing consider the security of the plant.
There are a few changes that need to be made to ensure our nuclear power plants are kept safe. "Under current regulations, the NRC license renewal procedures address the age-related structural degradation of fixed, non-moving components, like the reactor core, containment systems, pipes and electrical cables, but do not specifically call for the evaluation of factors relevant to the avoidance of a catastrophe, such as:

• Location of the plant and population density,

• Security and susceptibility to a terrorist attack,

• Adequacy of emergency warning and evacuation plans, and

• Geographic and seismic issues."(Ziegler, http://www.ag.state.il.us/pressroom/2007_11/20071115.html, 05/01/08) They need to add the bulleted points in order for them to actually be safe in the case of a terrorist attack or a natural disaster. They need to be able to analyze the effectiveness of the location of the plant and how in danger the populous is in if there is a meltdown. Also they need to be able to evacuate everyone properly if there is an accident to happen. They need to see how likely it is of a terrorist attack hitting the plant. And also they need to see how likely it is, if there is some sort of natural disaster, that there will be an overload. Unless if they update the regulations and the power plants, they are in serious danger of some sort of natural or unnatural disaster harming the environment and humans. Looking at where the plant is located and the population density gives the people a better idea of what type of environment the reactor is operating under or near, and who is in danger in the event of an accident. If they know how secure and weak the power plant is to terrorist attacks, they can get a better idea of what would happen if there was a terrorist attack and if it were to end catastrophically or not. How well the emergency warning system and evacuation plans are lets the people know how ready the population of the plant and the surrounding inhabitants are in case something does go wrong. And also geographic and seismic activity can measure how likely the plant would be to receive damage in the event of an earthquake if there is one.
Without the discovery of fissioning uranium, none of this would be possible however. "For all practical purposes, the only natural element whose atoms can be split easily is uranium, a heavy metal with the largest atom of all natural elements and an unusually high neutron-to-proton ratio. This higher ratio does not enhance its "splitability," but it does have an important bearing on its ability to facilitate an explosion, making uranium-235 an exceptional candidate for nuclear fission." (Bellis, http://inventors.about.com/od/nstartinventions/a/Nuclear_Fission.htm, 05/01/08) The discovery of the nuclear reaction made the hydrogen and the atom bomb possible. Even though the atom bomb was created first (because fission was created before fusion), it led to the hydrogen bomb. Without this discovery, nuclear energy would not be possible.
What happens when there is a reaction is quite amazing."Fission, simply put, is a nuclear reaction in which an atomic nucleus splits into fragments, usually two fragments of comparable mass, emitting 100 million to several hundred million volts of energy."(http://inventors.about.com/od/nstartinventions/a/Nuclear_Fission.htm, 05/01/08) Because nuclear fission creates such large amounts of electric energy, it was potentially a good energy source.
But even though nuclear energy is becoming increasingly popular, the first idea was origionally to use the process for a bomb. "Einstein and several other scientists told Roosevelt of efforts in Nazi Germany to purify uranium-235, which could be used to build an atomic bomb. It was shortly thereafter that the United States Government began the serious undertaking known then only as "The Manhattan Project." Simply put, the Manhattan Project was committed to expediting research that would produce a viable atomic bomb." ( http://inventors.about.com/od/astartinventions/a/atomic_bomb.htm, 05/01/08) Basically, this whole nuclear revolution started with the letter that Einstein collaborated with Szilard to produce a short letter to President Roosevelt based on Szilard's longer letter that he wrote to Roosevelt which Einstein signed. Roosevelt saw the importance of this technolegy and so this was the birth of the Atomic Bomb. Even though Roosevelt may not have realized how amazingly powerful the bombs could be, it was seen as a way to end WWII. Even though they defeated the Nazis, Japan was still seen as a viable threat. The Japanese army would seemingly not let up, even if the US Army reached the mainland. So they dropped two bombs, one on Hiroshima and one on Nagasaki.

Certain body parts of the human body are more resistant to radiation than others. (http://standeyo.com/News_Files/UN_Images/radiation.and.human.body.gif, 05/01/08) The most sensitive areas to radiation a
re the lung, breast, stomach, and colon. If one breathes in radioactive fumes, they have a high chance of dying because it is such a sensitive area. Same with consuming radioactive material.
However, just because certain areas such as the bone are not as sensitive doesn't make them invulnerable to radiation. "In 1966, after seven years of illness, my mother died in the A-Bomb victims Hospital in Hiroshima. When I went to the crematorium to collect her ashes, I was shocked. There were no bones left in my mother's ashes, as there normally are after a cremation. Radioactive cesium from the bomb had eaten away at her bones to the point that they disintegrated"(Nakazawa, Intro) This shows how even though it may take longer in order for the effects to be felt, radiation still can strike even the strongest parts of the human body.

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Innovative Thinkers

Albert Einstein was a scientist who studied physics. After finding the theory of relativity, he gained an extreme amount of popularity. In 1922 he received the Nobel prize for Physics. in 1939 he wrote a letter to President Roosevelt saying "'It may become possible to set up nuclear chain reactions... This new phenomenon wold also lead to the construction of bombs.' When Roosevelt read the letter, he crisply ordered, 'This requires action.'"(http://discovermagazine.com/204/sep/no-mere-genius/article_print, 05/01/08) It is probably because at this time Einstein had achieved celebrity status that he was able to get his letter noticed by the President even though states that Leo Szilard actually wrote the letters and Einstein just signed them. "Einstein was no an expert in nuclear physics, and had heard nothing about a chain reaction involving uranium nuclei, but he quickly understood the implications of the breakthrough"(Parker, 246-247) "Szilard ended up composing two letters, a short one and a long one, and he returned with them to Einstein for his signature. This time Edward Teller went with him. Einstein signed both letters, but in the end it was the longer letter that Sachs carried to Roosevelt."(Parker, Pg 247). So really it is Einsteins popularity that allowed the letters to become recognized, and his signature that made it apparent that it was his work. Really we should credit Szilard for the letter to Roosevelt and maybe even sparking the idea of a nuclear bomb.
The creation of nuclear fission started in Germany. "Near the end of 1938 two German scientists, Otto Hahn and Fritz Strassman of the Kaiser Wilhelm Institute in Berlin, made a startling discovery. Upon bombarding uranium nuclei with neutrons, they discovered that there was barium in the decay products.This was particularly surprising since barium is only half as heavy as uranium"(Parker, 246). What happened was they had 235 Uranium and it was hit with the neutron, which caused the molecule to split. When this happened this wasn't the first discovery but the first successful experiment to see what would happen.
"After a considerable discussion, they finally realized that the presence of barium could only be explained by a breaking up or "fissioning" of the uranium nucleus. Fritsch told Niels Bohr about it, and Bohr, who was just leaving for the United States, was quickly convinced, and he became very excited. Experiments soon showed that when the uranium nucleus fissioned, two neutrons were released, and each would cause another fissioning. In essence, a "chain reaction" would occur in a tiny fraction of a second, releasing a tremendous amount of energy"(Parker, 246) When this happened, this was a great discovery. Now this could be either used to create a lot of energy, or build a really large bomb. "Bohr realized the potential for a super bomb, and he conveyed the information to Enrico Fermi when he got to the United States. Fermi was one of the leading nuclear physicists in the world and had barely missed discovering fission himself. Leo Szilard, who had fled Europe several years earlier, also soon heard of it and almost went into panic." (Parker, 246) People got the idea that you could split an atom through this, and it eventually got to Einstein through Szilard. Even though this would be used to make a bomb before nuclear energy, the idea of using it for power remained present. It is because each reaction creates so much energy and during this time WW2 was going on, Roosevelt was probably more concerned with using this to help us out in the war rather than help out citizens at home in the U.S. The war industry was very large at this time and was what was bringing the country out of the depression. It created jobs for people who needed them, created something that the country needed badly. This is why splitting uranium could only be used for destructive energy initially and not constructive to help out the community.
Leo Szilard, one of the initial innovators of nuclear fission gave his input in an interview on the use of the A-Bomb."Q Would a United States Government today, confronted with the same set of choices and approximately the same degree of military intelligence, reach a different decision as to using the first A-bomb?

A I think it depends on the person of the President. Truman did not understand what was involved. You can see that from the language he used. Truman announced the bombing of Hiroshima while he was at sea coming back from Potsdam, and his announcement contained the phrase - I quote from the New York "Times" of August 7, 1945: "We have spent 2 billion dollars on the greatest scientific gamble in history - and won.

To put the atomic bomb in terms of having gambled 2 billion dollars and having "won" offended my sense of proportions, and I concluded at that time that Truman did not understand at all what was involved."(http://www.peak.org/~danneng/decision/usnews.html, 05/01/08)

What this article talks about is how even though bombing Hiroshima might have "stopped" the war, if he hadn't a lot of scientists would have kept working. But because they saw how the U.S. reacted when we made the atom bomb, they didn't want to make an even deadlier bomb and then have the government drop it over another country. This was probably due to the fact that Truman didn't really understand too much of what went into making the bomb. Nuclear fission had already been created, they just had to find a way to create an unstable reaction inside of a bomb that would multiply exponentially. Even though Szilard didn't actually discover nuclear fission, he understood the process and he was the first person to patent it. He understood there could be better uses for the energy rather than a bomb. If Truman had known more about what was involved in the making of a nuclear bomb, he probably wouldn't have viewed it as a gamble, and maybe would have come to a different decision.
Even though Einstein may not have totally understood a lot about nuclear fission, he still understood why it was possible. "The fourth was a sort of continuation of his third, creating the equation E=mc(squared) which basically means "energy equals mass multiplied by the speed of light squared". "Although not exactly a recipe for an atomic bomb, it explained why one was possible."(http://discovermagazine.com/204/sep/no-mere-genius/article_print, 05/01/08) How this shows how an atomic bomb is possible is it shows how much energy could come out of nuclear fission at a certain level.


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