We can obtain energy manipulating one or several nuclei of atoms throught two different methods: attaching the cores from different atoms (the nuclear fusion) or splitting a given atom nuclei (the nuclear fission).
In nuclear energy, nuclear fission is the action through which the nucleus of an atom is divided. The core forms different fragments with a mass equivalent to half of the original mass and two or three neutrons.
The total mass of the fragments is smaller than the original…
A nuclear reactor is an installation capable of initiating, controlling and maintaining nuclear reactions (usually nuclear fission) chain that occur in the core of this facility.
The composition of the nuclear reactor is formed by the nuclear fuel, coolant, control elements, structural materials and, in the case in question a thermal nuclear reactor, the moderator.
Nuclear reactors can be classified as thermal reactors and fast reactors.
Thermal reactors are those which function by delaying (moderating) the fastest neutrons or increasing the proportion of fissile atoms.…
A nuclear power plant is a facility for obtaining electrical energy using nuclear energy.
Its operation is similar to that of a thermal power plant or that of a solar thermal plant: from a source of energy thermodynamics is used to obtain heat, with the heat to get steam and with the steam to drive a turbine that will generate electricity.
The difference between the different types of electrical installations is in the energy source: a nuclear power plant uses the heat released in the nuclear fission reactions of certain atoms, in a thermal power station the heat source (thermal…
Nuclear energy is the energy in the nucleus of an atom. Atoms are the smallest particles that can break a material. At the core of each atom there are two types of particles (neutrons and protons) that are held together. Nuclear energy is the energy that holds neutrons and protons.
Nuclear energy can be used to produce electricity. This energy can be obtained in two ways: nuclear fusion and nuclear fission. In nuclear fusion, energy is released when atoms are combined or fused together to form a larger atom. The sun produces energy like this. In nuclear fission, atoms are split into…
Nuclear fuel is the material used for the generation of nuclear energy. It is a material that can be fissured or fused depending on whether its use is nuclear fission or nuclear fusion.
We refer to nuclear fuel both to the material (uranium, plutonium ...) and to the whole made with said nuclear material (fuel rods, nuclear material compositions and the moderator or any other combination.
The most known nuclear fuel is uranium because it is the most commonly used in nuclear fission reactors. Currently all nuclear reactors in production for the generation of electric power are…
To explain the history of nuclear energy we could distinguish three major stages:
- Physical and chemical scientific studies of the elements.
- The development of the nuclear bomb during World War II.
- Use of nuclear energy in the civil field.
Scientific studies cover this whole period since the first Greek philosophers began to define atoms, until the development of the first nuclear bomb. In this process, different scientists discover the presence of electrons, neutrons and protons and properties that make one atom more radioactive than another.…
Nowadays, the main use given to nuclear energy is the generation of electric power. Nuclear power plants are responsible of doing this process. Almost all nuclear power plants in production are using nuclear fission since the nuclear fusion, despite being under development, is currently unfeasible.
The operation of a nuclear power plant is identical to the operation of a thermoelectric power plant operating with coal, oil or gas, except in the way of providing heat to the water for converting this one into steam. In nuclear reactors this process of producing heat is made by the fission…
Atomic energy comes from the atom, it is the energy that holds together neutrons and protons of the nuclei of atoms. It is also known how nuclear energy, which comes from the nucleus. The name nuclear energy is used because most of the energy of an atom resides in its nucleus.
Two parts of the atom, the nucleus and the crust are differentiated. In the cortex, an indeterminate number of electrons orbit around the nucleus. The nucleus is composed of an indeterminate number of neutrons and protons. The amount of protons in the nucleus will determine the element that the atom is treated,…
Neutron moderator is a component part of the nuclear reactors. It is located in the reactor core. The function of the moderator is to reduce the speed of the neutrons in a nuclear fission reaction.
During nuclear reactions fission neutrons collide with fissile atoms (
We distinguish two types of nuclear reactors
- Nuclear research reactors. This type of reactors used neutrons generated during nuclear fission reactions to produce radioisotopes that are going to be used in other applications of nuclear energy or materials for studies.
- Nuclear power reactors. These reactors are based on the use of the thermal energy generated in the fission reactions. The main and most known application of this type of reactor is to generate electricity in nuclear power plants. However, also they are used for desalination…
In this section we analyze the advantages and disadvantages of nuclear power. Nevertheless, most organizations related to nuclear energy are already positioned for or against the use of nuclear power. On this site we try to make an objective analysis about this question, giving all the relevant information and offering a space for different conclusions. Advantages of nuclear power
The generation of electricity through nuclear energy reduces the amount of energy generated from fossil fuels (coal and oil). Less use of fossil fuels means lowering…
Plutonium is a chemical element with symbol Pu and atomic number 94 which belongs to the actinide series of elements. Plutonium has 16 isotopes, all radioactive. The element is a silvery metal and has 5 different crystal structures.
Chemically plutonium is a very active material. You can form compounds with all nonmetals except the noble gases. The metal dissolves in acidic and reacts with water, but only moderately in comparison with the acid.
While you can find traces in nature, all isotopes of plutonium are of artificial origin. Radioactivity plutonium
Ability of a physical system to produce a job.
This definition, although it is the most widespread, can be misleading because of the vagueness of the term "capacity", and therefore, it is better to define the energy as what, when a work occurs, decreases in an amount equal to the work produced. Energy, then, is measured in the same units as labor. History of the study of energy
The notion of energy appears for the first time from the investigations of Joule and Carnot on the conversion of heat in mechanical work and thanks to the theory of Helmholtz in which it connects…
The control rods of nuclear reactors provide speed control nuclear fission reactions delas chain. It is cylindrical tubes made of a neutron absorbing material. This material may be boron carbide or alloys of silver, indium and cadmium.
Dimensions of the control rods are the same as those of the rods of nuclear fuel. They are used to provide a rapid means of control of the nuclear reaction. The control rods to regulate the rate of nuclear reaction
The nuclear accident in Chernobyl (1986) is by far the most serious nuclear accident in the history of nuclear energy. It was classified as level 7 (severe nuclear accident) of the INES scale, the highest value. Although it is the same level at the Fukushima nuclear accident was classified, the consequences of the Chernobyl accident were still far worse.
The Chernobyl nuclear power plant is located near the town of Prypyat, 18km from the city of Chernobyl.
At the time of the Chernobyl nuclear power plant accident provided 4 reactors in operation and two more were under construction.…