Nuclear Power Plants: 19/10/09 Onur Arslan 1

NUCLEAR POWER PLANTS

19/10/09

Onur ARSLAN

1

We will examine how a power plant work and how obtain electrical energy by using this method.additionally We'll explain nuclear fission and give you a general view for nuclear power plants

19/10/09

Onur ARSLAN

2

To understand the basics of nuclear power production, it is necessary to understand the characteristics of atoms. Atoms, the fundamental components of all matter, are composed of three primary particles: protons, neutrons, and electrons. Protons and neutrons comprise the center, or nucleus. The protons and neutrons are held together by a powerful force called nuclear energy. 19/10/09

Onur ARSLAN

3

Resim(proton)

19/10/09

Onur ARSLAN

4

When a neutron strikes a uranium-235 atom, its nucleus becomes unstable. The atom then splits into two smaller atoms (fission products), releases two or three neutrons, and releases energy in the form of heat. The "free" neutrons released can strike other uranium-235 atoms, causing them to fission, and this process, or chain reaction, will continue as long as there are uranium-235 atoms available.

19/10/09

Onur ARSLAN

5

Uranium atom neutron

19/10/09

Onur ARSLAN

6

The uranium is formed into ceramic pellets(rods). These pellets are inserted into long, vertical tubes within the reactor.and these pellets are consumed due to fission reaction.

19/10/09

Onur ARSLAN

7

19/10/09

Onur ARSLAN

8

In fact, power plants that generate electricity from nuclear energy are not so very different from other kinds of power plants. Water is converted to steam via heat. And steam blows the blades of a turbine which spins the shaft of the generator. 19/10/09

Onur ARSLAN

9

19/10/09

Onur ARSLAN

10

Nuclear plants don't pollute the air with sulfur oxides, nitrogen oxides, dust or greenhouse gases like carbon dioxide. Nuclear plants emit radiation just same amount of fossil-fuel plants, so they don’t effect the natural life around them.

19/10/09

Onur ARSLAN

11

19/10/09

Onur ARSLAN

12

Nuclear Wastes Nuclear wastes always release radiation which isch is mortal for people. By the year 2000, nuclear plants will have produced a total of about 40,000 tons of waste fuel since 1951.

19/10/09

Onur ARSLAN

13

Deposition of wastes are very important. They must be placed deep underground where geological activities are stable.then the depositories are always checked with sensors. because when they have contact with the air or mix the drinking water, it would be a disaster. Secondly, a multi-barrier approach can be used to ensure that none of the radioactivity escapes 19/10/09

Onur ARSLAN

14