Celebrate another fantastic year of learning with Alison's End-of-Year Sale. Get 25% off ALL Certification!
Sale ends Tuesday, 12 December
Usted ha añadido cursos libres de propaganda a su carrito de compras. Ahora solo páguelo para disfrutar de todos los cursos sin propagandaVaya al carrito
¿que tipo de uranio se utiliza en la generación de energía nuclear?
It is one of the most expensive non renewable energy also very dangerous. You have to produce physicists to deal with its challenges. Another problem is hard to deal with the disposal of nuclear waste. Just imagine the damage it will cause if aquifers are contaminated with radioactive materials.
What is Uranium?
In most electric power plants, water is heated and converted into steam, which drives a turbine-generator to produce electricity. Fossil-fueled power plants produce heat by burning coal, oil, or natural gas.
In a nuclear power plant, the fission of uranium atoms in the reactor provides the heat to produce steam for generating electricity.
Several commercial reactor designs are currently in use in the United States. The most widely used design consists of a heavy steel pressure vessel surrounding a reactor core.
The reactor core contains the uranium fuel, which is formed into cylindrical ceramic pellets and sealed in long metal tubes called fuel rods. Thousands of fuel rods form the reactor core.
Heat is produced in a nuclear reactor when neutrons strike uranium atoms, causing them to split in a continuous chain reaction. Control rods, which are made of a material such as boron that absorbs neutrons, are placed among the fuel assemblies.
When the neutron-absorbing control rods are pulled out of the core, more neutrons become available for fission and the chain reaction speeds up, producing more heat.
When they are inserted into the core, fewer neutrons are available for fission, and the chain reaction slows or stops, reducing the heat generated.
Heat is removed from the reactor core area by water flowing through it in a closed pressurized loop. The heat is transferred to a second water loop through a heat exchanger. The water also serves to slow down, or \"moderate\" the neutrons which is necessary for sustaining the fission reactions.
The second loop is kept at a lower pressure, allowing the water to boil and create steam, which is used to power the turbine-generator and produce electricity.
Originally, nuclear energy was expected to be a clean and cheap source of energy. Nuclear fission does not produce atmospheric pollution or greenhouse gases and it proponents expected that nuclear energy would be cheaper and last longer than fossil fuels.
Unfortunately, because of construction cost overruns, poor management, and numerous regulations, nuclear power ended up being much more expensive than predicted.
The nuclear accidents at Three Mile Island in Pennsylvania and the Chernobyl Nuclear Plant in the Ukraine raised concerns about the safety of nuclear power.
Furthermore, the problem of safely disposing spent nuclear fuel remains unresolved. The United States has not built a new nuclear facility in over twenty years, but with continued energy crises across the country that situation may change.