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production of electricity from nuclear energy click to hear : production of electricity from nuclear energy

A nuclear fission chain reaction is started and controlled inside the reactor to produce electricity.
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cold coolant transfer of heat to water hot coolant water turns into steam reactor containment building dousing water tank sprinklers safety valve fission of uranium fuel heat production production of electricity by the generator turbine shaft turns generator water is pumped back into the steam generator water cools the used steam condensation of steam into water electricity transmission voltage increase steam pressure drives turbine fuel coolant moderator

cold coolant click to hear : cold coolant

After releasing its heat to the steam generator, the cold coolant returns to the reactor.

transfer of heat to water click to hear : transfer of heat to water

The coolant releases the heat given off by the fission of uranium to the steam generator.

hot coolant click to hear : hot coolant

The coolant extracts heat from the fuel and carries it toward the steam generator.

water turns into steam click to hear : water turns into steam

The hot coolant heats the water of the generator and brings it to the boiling point.

reactor click to hear : reactor

Tightly sealed area where fission of the fuel is carried out in a controlled manner to release heat.

containment building click to hear : containment building

Concrete building used to collect the radioactive steam from the reactor in the event of an accident.

dousing water tank click to hear : dousing water tank

Vat that contains water to cool the radioactive steam in the reactor in the event of an accident; this prevents a rise in pressure.

sprinklers click to hear : sprinklers

Devices that release water to condense radioactive steam.

safety valve click to hear : safety valve

Device that lowers the pressure inside the reactor by discharging the radioactive steam to the containment building.

fission of uranium fuel click to hear : fission of uranium fuel

The nuclei of the atoms break up; this frees neutrons and releases energy in the form of heat.

heat production click to hear : heat production

The fission of atoms releases intense heat (between 300°C and 500°C), which is transmitted to the coolant.

production of electricity by the generator click to hear : production of electricity by the generator

The generator produces electricity through the movement of the rotor in the stator.

turbine shaft turns generator click to hear : turbine shaft turns generator

The rotational movement of the turbine is transmitted to the generator’s rotor.

water is pumped back into the steam generator click to hear : water is pumped back into the steam generator

After passing through the turbine, water produced by the condensation of the steam returns to the steam generator.

water cools the used steam click to hear : water cools the used steam

Cooling of the steam from the turbine is done with river or lake water.

condensation of steam into water click to hear : condensation of steam into water

At the turbine outlet, the steam cools and condenses into water.

electricity transmission click to hear : electricity transmission

Using high-voltage lines to transmit electricity over long distances reduces the strength of the current and, as a result, energy losses.

voltage increase click to hear : voltage increase

At the outlet end of the power plant, the transformer increases the voltage; this reduces energy losses during transmission over long distances.

steam pressure drives turbine click to hear : steam pressure drives turbine

Steam from the steam generator turns the turbine runner, which is connected to the generator.

fuel click to hear : fuel

Matter placed in the core of the reactor that contains heavy atoms (uranium, plutonium); energy is extracted from it by fission.

coolant click to hear : coolant

Liquid or gas (including heavy water and carbon dioxide) that circulates inside the reactor; it harnesses and transports the heat released during fission of the fuel.

moderator click to hear : moderator

Substance (ordinary water, heavy water, graphite) that slows the fast-moving neutrons emitted during fission to increase the probability of new collisions.