Sunday, January 25, 2015

Community first learned gbl about nuclear power in the form of the atomic bombs dropped on Hiroshim


Community first learned gbl about nuclear power in the form of the atomic bombs dropped on Hiroshima and Nagasaki in World War II in 1945. So the enormity of the consequences caused by the bomb so that its influence can still be felt until now. In addition to a powerful ultimate weapon, a long time people have been thinking about how to harness nuclear power for the welfare of mankind. Until now, nuclear power, in particular radioactive substances have been widely used in various gbl fields including industry, health, agriculture, livestock, sterilization of pharmaceutical products and medical devices, food preservation, the field of hydrology, which is the application of nuclear techniques for non energy. One use of nuclear techniques in the field of energy are now grown and used on a large scale in the form of a nuclear power plant (NPP), where nuclear power is used to generate electricity is relatively inexpensive, safe and do not pollute the environment. Use of nuclear energy in the form of nuclear power plants gbl was developed commercially since 1954. At that time in Russia (USSR), built and operated a pressurized light water nuclear power plant units high (VVER = PWR) that a year later reached 5 MWe power. In 1956 in the UK developed the type of Gas Cooled Reactor nuclear power plant (gas-cooled reactors GCR +) with a power of 100 MWe. In 1997 the worldwide both in the developed and developing gbl countries have as many as 443 units operated nuclear gbl power plants spread across 31 countries, contributing around 18% of the world's supply of electric power to the total power generation reached 351,000 MWe and 36 units of nuclear power plants are under construction in 18 countries. Differences Conventional Power Plants (PLK) with NPP In conventional power plants, water is evaporated in a kettle through the burning of fossil (oil, coal and gas). The money earned is applied to a steam turbine that will move when the vapor pressure. Rotation of the turbine is then used to drive a generator, so that will be generated electricity. Fuel power plants with coal, oil and gas has the potential to cause environmental impacts and problems of transport fuel from the mine to the location of generation. The environmental impact of burning fossil fuel may be either CO2 (carbon dioxide), SO2 (sulfur dioxide) and NOx (nitrogen oxides), as well as dust containing heavy metals. The biggest concern in electricity generation with fossil fuels is that it can lead to acid rain and global warming increase.
NPP berperasi with the same principles as PLK, only heat is used to generate steam is not generated from the burning of fossil fuels, but is produced from the reaction of nuclear division of fissile material (uranium) in a nuclear reactor. The heat energy is used to generate steam in the steam generator system (Steam Generator) and are the same as in the PLK, steam is used to drive a turbine generator to generate electricity. As the heat exchanger used water is circulated continuously during operation of nuclear power plants. Electricity generation process is not liberate fumes or dust containing heavy metals released into the environment or release harmful particles such as CO2, SO2, NOx into the environment, so that the NPP is an environmentally friendly power generation. Radioactive waste resulting from the operation of nuclear power plants is in the form of spent fuel elements in solid form. The spent fuel elements may be temporarily stored on site prior to the storage of nuclear power plants in a sustainable gbl manner. On Nuclear Physics Heat is used to generate steam is produced as a result of cleavage nuclei can be described as follows: If one neutron gbl (produced from neutron sources) caught by one atom of uranium-235 nucleus, the nucleus of the atom will split into 2 or 3 parts / fragments. Most of the energy originally binding fragments, gbl respectively in the form of kinetic energy, so that they can move at high speed. Therefore fragments that were in the crystal structure of uranium, they can not move away and immediately slowed movements. In this deceleration process kinetic energy is converted into heat (thermal energy). As gambaaran can be argued that the thermal energy generated from the cleavage reaction of 1 kg of uranium-235 pure magnitude is 17 billion kilo calories, or the equivalent of the thermal energy generated from the combustion of 2.4 million pounds (2400 tons) of coal. Besides fragments-frag

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