Nuclear Power Plant Isar, Germany

Spent nuclear fuel pool

Turbine of a nuclear plant

Tag: electric

Electric power. What is it?

Electric power. What is it?

We define electrical energy as the form of energy that results from the existence of a potential difference between two points. When these two points are brought into contact by an electric conductor we obtain an electric current.

Physical aspects of electrical energy

From a physical point of view, electrical energy is negative electrical charges (electrons) that move through the electric conductor, usually metallic, due to the potential difference between its ends. The reason metal conductors are usually used is because they have more free electrons.

Electric charges moving…

The electron. What is it?

The electron. What is it?

An electron is a stable negatively charged elementary particle which is one of the fundamental components of the atom. For this reason it can also be defined as a subatomic particle. It is part of the group of leptons.

Electrons may appear in the free state (without being attached to any atom) or attached to the nucleus of an atom. There are electrons in atoms spherical layers of different radious. These spherical layers represent energy levels. The larger spherical shell, the greater the energy contained in the electron.

In the electrical conductors, the current flows results…

Fukushima nuclear accident

Fukushima nuclear accident

On March 11, 2011 in Fukushima occurred one of the worst nuclear accidents in history after the Chernobyl nuclear accident.

A 8.9 magnitude earthquake off the northwest coast of Japan and a subsequent tsunami severely affected Dahiichi Fukushima nuclear plant on the northeast coast of Japan.

At the time of the nuclear accident at the Fukushima reactors had 6. Reactors 1, 2 and 3 were operating while nuclear reactors 4, 5 and 6 were unemployed for maintenance.

After the earthquake Fukushima reactors that were still running is automatically stopped. To cool the reactors,…

Definition of energy

Definition of energy

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…

Renewable energy

Renewable energy

Renewable energies are those energies using an energy source or fuel which is considered inexhaustible or can be regenerated at the same rate at which it is consumed.

The classification of renewable energy depends on natural resources exploited.

Solar energy

We distinguish two ways of using solar energy:

  • Solar thermal
  • Solar photovoltaics

The use of solar thermal is to use heat energy obtained from solar radiation to heat a fluid, depending on its temperature,…

Nuclear power in Mexico

Mexico is rich in hydrocarbon resources and is a net exporter of energy. Country's interest in nuclear energy is based on the need to reduce their dependence on these sources of energy. In recent years, Mexico's energy is increasingly dependent on natural gas.

The energy growth was very rapid in the 1990s, but then stabilized for a few years. Since 2007 expected new growth in demand for electricity to an average rate of almost 6% per year. In 2007, we generated 257 million kWh. Supply Origin is varied electric, gas 126 TWh (49%), oil of 52 TWh (20%), coal 32 TWh (12.5%) and hydroelectric…

Advantages and disadvantages of nuclear power

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…

operation of a nuclear power plant

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 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 reactions…

Nuclear power plant definition

A nuclear power plant is a facility for the production of electricity using nuclear energy.

Its operation is similar to a thermic power plant. The difference is that the power source from a nuclear plant is nuclear fission of certain atoms while in a thermic power plant the heat source (thermal energy) from burning of one or more fossil fuels (coal, natural gas , fuel ..). As in a conventional thermal power plant the heat is used to generate steam that drives a steam turbine connected to a generator that produces electricity.

The thermal energy that nuclear power…

Types of nuclear reactors

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…

What is a molecule?

What is a molecule?

A molecule is a set of chemically bonded atoms. The electric charge of the molecules is neutral.

There is a definition of an older molecule that is less general and less precise: "A molecule is the smallest pair of a substance that can have independent and stable existence while retaining its chemical properties and certain physicochemical properties." By this definition there could be molecules with a single atom.

Types of molecules

Molecules can be formed in two different ways:

  • Discrete molecules: molecules can be formed by a well defined number of atoms…