length: 2114 words 6 double spaced pages in 1950, the first commercial nuclear power plants were constructed. The public was promised a non polluting and resourceful type of energy, but how safe was, and is, nuclear energy? although there are less than 500 licensed nuclear power plants in the world, many nuclear accidents have already been endangering civilian lives. Nuclear energy may appear to be the ideal source of energy for the future: however, there are many negative effects of nuclear energy that can lead to very dangerous situations. Energy has always been among the basic human concerns, along with food and shelter.

It takes part in all activities, from walking to the operation of even the most complicated equipment. Mankind has been faced with the challenge of meeting its energy needs without risking human health and the the many types of energy are mechanical, thermal, chemical, electrical, radiant, and atomic microsoft encarta. Coal was next in line with 26%, then natural gas with 17%, biomass 15%, and nuclear energy with only 4% galperin 19. With the main sources of our energy running low, nations look to new sources to provide our society with power. Nuclear energy, the newest type of energy, was researched to see if it would be the most promising type of energy for the future. In 1896, the french scientist, antoine henri becquerel, conducted an experiment with uranium salts and found that these salts gave off their own light when exposed to sunlight.

Marie and pierre curie were fascinated by the possibilities of becquerel’s rays. The curies discovered exactly what the rays were and then named the phenomenon radioactivity halacy 6. During world war ii, many scientists from around the world came to the united states to work on nuclear reactors and weapons. With much success, they continued after world war ii and concentrated more on nuclear energy. The scientists instantly saw that nuclear energy would be a great source of power because of the amount of power it released.

Splitting an amount of uranium equal to one penny would produce as much energy as seven and a half tons of coal a nuclear power plant is where energy is formed when nuclear fission or fusion takes place. So far, however, only the power of fission has been controlled and used for energy. There are many parts of the nuclear power plant, including the reactor, generator, control room, cooling systems, and the electrical, air, and water lines. The heart of the nuclear power plant is its reactor core, which contains a few hundred fuel assemblies.

The reactor core is encased in a pressured steel tank with walls several inches thick. This is a steel reinforced concrete dome that is about three feet thick and serves as the outermost barrier between the plant and the environment around it. There are many different types of nuclear reactors, but all the power plants in the united states and more than three quarters of those worldwide are light water reactors. There are two types of light water reactors, which are boiling water and pressurized water reactors.

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Both types use ordinary water as coolant and require enriched in boiling water reactors, cooling water surrounds fuel assemblies. The heat of nuclear fission makes the water boil and the steam produced is carried away from the core to the turbines. Once its work is done, the steam is condensed to water and it returns to the reactor galperin 44.

The pressurized water reactor is more commonly used than the boiling water reactor. This reactor seals the cooling water in a closed loop and adds a heat exchange system. The hot water is piped through a steam generator and converts a secondary water supply into steam to power the turbine. The two water supplies do not a gas cooled reactor is similar to a pressurized water reactor. The only main difference is that helium or carbon dioxide gas replaces the water in the primary loop. These reactors cost more to operate and to build, but are more energy efficient galperin 46. This is very different then other reactors because it produces more fissionable material then it consumes.

It takes about 10 to 60 years to use up the fuel from just one cycle galperin 46. High level waste is mostly from the used fuel rods and other materials exposed to as much radiation as they are. High level wastes can let out very large amounts of radiation for thousands of years.

There is no place to store this waste that is safe, and it will always be radioactive. Other proposed storing solutions are sending it to space, burying it in the core of the earth, burying it in the ocean, or burying it under the antarctic ice. Two engineers in connecticut have, not too long ago, caught the nuclear regulatory commission nrc in a dangerous game of disobeying the rules. The nrc has been regularly disobeying safety rules to let plants keep the cost down and stay open to operate microsoft encarta. Two senior engineers started questioning after one of them had checked the specifications of the cooling after eighteen months of operation, a nuclear power plant is temporarily shut down.

Places to store the old fuel rods are rather limited, especially since the federal government has never designated an official storage place for this high level waste. So where used fuel rods are kept at a fuel pool at the plant until they can find a storage place for them. If the cooling system fails, the pool could boil, turning the plant into a lethal sauna filled with radioactive steam microsoft encarta. George galatis, an employee at millstone 1 nuclear facility, had been checking specifications and realized that the reports of safety in the fuel pool had not been kept. He did some checking of his own on this, and discovered that the plant had been putting almost three times as many fuel rods in the fuel pool as they were supposed to.

He wanted to report this to the nrc right away, but he knew that some nuclear facilities, like this one, was known to harass and even fire employees who raised safety concerns. Therefore, he teamed up with another employee at the plant, george betancourt, and brought the issue up to the supervisors of the plant. Galatis and betancourt then took the problem to the nrc themselves and found that the nrc had been ignoring the problem for over a nuclear facility scandals have not just been happening recently. The chelyabinsk 40 reactor was located near the ural mountains in the city of kyshtym, russia.

A tank holding radioactive gases exploded, contaminating land thousands of miles around the plant. What we do know, however, is that the region around the reactor is sealed, and more than 30 towns in the area around it have disappeared from the soviet map galperin 74. In a town several miles north of liverpool, england, there was the nuclear repossessing plant called windscale. The temperature indicators did not recognize the problem in time, so a large amount of radiation escaped, contaminating two hundred miles of countryside. This accident is said to have caused birth defects, cancer, and leukemia in many people who were near the site schneider in 1975, at brown’s ferry nuclear plant in decatur, alabama, there was another nuclear accident. A meltdown was luckily prevented, but a worse disaster certainly could have happened galperin 75. The worst nuclear accident in the united states occurred in 1979 at three mile island.

Many of these reactors had poor safety records and an nrc inspector suggested that they be evaluated. During the cleaning of a sector of the plant, one pump failed which caused the temperatures to rise in the cooling circuit. Part of this process is still going on, and the estimated cost upon completion is around two billion dollars stephens 174. The chernobyl nuclear disaster in russia was the worst accident in nuclear history. It took three days of meltdown for the nuclear plant officials to even realize there was a problem. The problem was discovered when technicians in countries bordering russia noticed high radiation levels and decided it was coming from chernobyl. Explosions were shooting radiation into the air because chernobyl was not built with a containment structure.