Types of Nuclear Power Stations

Date: 2015-10-07; view: 470.

The Arrangement of a NPS

1. A NPP converts heat into electricity.

2. Nuclear energy is usually used as a heat source.

3. Energy is given off by the nuclear fuel as nuclei of Uranium split into pieces.

4. This energy is in the form of fast-moving particles and invisible radiation.

5. As the particles and radiation move through the fuel and surrounding water, the energy is converted into heat.

6. The heat is used to heat water to the boiling point and produce steam.

7. This steam is carried by pipes to spin the turbine.

8. The turbine is connected to a generator.

9. When the turbine shaft spins, the generator turns and produces electricity.

10. This electricity is then carried by wires to the homes, enterprises and institutions which use the electricity.

1. Nuclear power stations may be classified by the number of circuits.

2. There are single-circuit, double-circuit and three-circuit nuclear power stations.

3. If the circuits of the coolant and the working substance coincide, this will be а single-circuit nuclear station.

4. If the circuits of the coolant and the working substance are separated, such а nuclear power station is called а double-circuit station.

5. The circuit of the coolant is known as the primary and that of the working substance as the secondary.

6. А double-circuit station always requires а steam generating plant, which separates the two circuits.

7. A steam generator belongs equally to the primary and the secondary circuit.

8. A three-circuit nuclear power station consists of the primary circuit, the intermediate circuit and secondary circuit.

9. Three-circuit nuclear power station has two heat exchangers – the primary HX and the secondary HX.

10. NPS may be classified according to the type of reactor, the type of steam turbines, the construction of the reactor and the type of moderator.