Nuclear Power Plant Isar, Germany

Spent nuclear fuel pool

Turbine of a nuclear plant

Tag: neutrons

Nuclear fission

Nuclear fission

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…

Isotopes, what are they?

Isotopes, what are they?

Isotopes are atoms whose nuclei have the same number of protons but different numbers of neutrons. Not all atoms of the same element are identical and each of these varieties corresponds to a different isotope.

Each isotope of the same element have the same atomic number (Z) but each has a different mass number (A). The atomic number is the number of protons in the atomic nucleus of the atom. The mass number is the sum of neutrons and protons of the core. This means that different isotopes of the same atom differ from each other only by the number of neutrons.

The items that can…

Nuclear reactor

Nuclear reactor

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.…

Neutron moderator definition

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 (

Uranium - nuclear fuel

Uranium is the most widely used nuclear fuel in nuclear fission reactions.

 

For the particular makes the uranium so different from the other substances we must first consider some basic nuclear physics.

 

Atom electrons comprises surrounding a core; in turn, a core consists of protons and neutrons. A proton has a positive charge; a neutron has no electric charge and is neutral. The positive charges of protons outward violently push attempt. But within the compact volume of a new class of core strength makes an appearance: an attractive force short range,…

What is a proton? Definition

What is a proton? Definition

A proton is a subatomic particle with a positive electric charge that lies within the atomic nucleus of atoms. The number of protons in the atomic nucleus is that which determines the atomic number of an element, as indicated in the periodic table of the elements.

The proton has +1 charge (or, alternatively, 1,602 x 10-19 coulombs), exactly the opposite of the charge -1 containing the electron. In mass, however, there is no competition because the mass of the proton is approximately 1,836 times greater than that of an electron.

The proton is classified as a baryon,…

The atom What is it?

The atom What is it?

What is an atom? Imagine you have a piece of iron. The parts. You still have two pieces of iron but smaller. The you come from again ... Every time have smaller pieces until you reach a moment that if the seeming from what you would no longer be hiero.

At this point what is left is an atom, an iron atom.

Definition of atom

From a more formal way, we define as the smallest atom in an element can be divided without losing its chemical properties particle.

The origin of the word atom comes from the Greek, meaning indivisible. At the time that these particles were baptized…

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…

Chernobyl nuclear accident

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.

Nuclear fusion

Nuclear fusion is a nuclear reaction through which two light nuclei of atoms, usually hydrogen and its isotopes (deuterium and tritium), are combined forming a heavier nucleus. This binding is usually accompanied by the emission of particles (in case of deuterium nuclei one neutron is emitted). This nuclear fusion reaction releases or absorbs a lot of energy in the form of gamma rays and kinetic energy of the emitted particles.This large amount of energy transforms matter to a plasma state.