1. Juan Luis García Martínez
Carmen Gª-Calvo López
Enrique Gª-Tenorio Corcuera
2ºC-D

2. Nuclear energy
 Nuclear energy is the energy
released in nuclear reactions.
However, we also refer to
nuclear energy as the use of
that energy for other purposes
such as providing
electrical, mechanical and
thermal energy from nuclear
reactions.

3. What is nuclear energy?
 Nuclear energy is a
physical-chemical
process in which a lot of
energy is released(called
nuclear energy). We will
explain the process
caused in nuclear
reactions in which this
nuclear energy is
obtained.

4. We analyze the two main methods
of obtaining nuclear energy:
Nuclear fission
Nuclear fusion

5. Nuclear fission
 Nuclear fission is one of the
two possible reactions that
take place when we work
with nuclear energy.
 We called nuclear fission
the division of the nucleus
of an atom. The nucleus
becomes many fragments
with a mass almost equal to
half the original mass plus
two or three neutrons.

6. Nuclear fusion A clear example is seen in
 Nuclear fusion is a nuclear the solar energy that
reaction in which two nuclei comes from the fusion of
of light atoms combine to hydrogen
form one heavier nuclei, generating helium
nucleus, releasing a and releasing a large
large amount of amount of energy.
energy.

7. Advantage Distribution of nuclear
energy in Europe
 A third of the energy
Findlandia
generated in Europe Bulgaria
comes from nuclear Suiza Distribution
energy, this implies that Armenia of nuclear
Ucrania energy in
emit 700 million tons of Europe
Eslovaquia
CO2 and other Francia
contaminants generated 0 50 100
from burning fossil fuels.

8. Advantage
 Fossil fuels will be exhausted in a not too
distant future. One of the great advantages
of using nuclear energy is the relationship
between the amount of fuel used and the
energy obtained.
Years
 Here is a graphic
which shows how Petrol
much time Coal
will non-renewable Uranium Years
last. Coal
0 100 200 300

9. Advantage
 As an alternative to fossil
fuels as carbon or oil, we
would avoid the problem
of so-called global
warming. It will improve
the quality of air we
breathe.

10. Disadvantages
 The main disadvantage is
that the responsibility falls
on people. Irresponsible
decisions can lead to
accidents at nuclear plants.
 One of the main problems is
the generation of nuclear
waste and the difficulty to
manage as it takes many
years to lose its
radioactivity and dangerous.
 Let’s see a real example of
how irresponsible decisions
can cause a disaster.

11. The nuclear accident of Chernobyl.
 On the 26th April 1986, the
reactor number four of the
nuclear plant of Chernobyl suffer
the most nuclear accident of the
history.
 The consequences of the disaster
affecting an area of ​nearly 5
million
inhabitants, contaminating 23%
of the surface of neighboring
Belarus, parts of Russia and
Ukraine and parts of
Poland, Czech Republic and
Germany.

12. Disadvantages
 Nuclear fusion is
unfeasible because of the
difficulty of heating the
gas to such high
temperatures and to
maintain a sufficient
number of cores for a
time sufficient to obtain
energy and retaining the
gas is highly expensive.

13. Important nuclear plants in Spain.
 The most important are:
 Sta. Mª de
Garoña, Trillo, José
Cabrera, Cofrentes, Ascó
I-II, Almaraz I-
II, Vandellós II.

14. How does a nuclear plant works?
 First, in the nuclear reactor, nuclear
fission occurs. This reaction
generates a lot of heat used to heat
water. The water transformed into
high-temperature steam, reaches
the turbine which rotates. It
transforms heat into kinetic energy.
The turbine is connected to an
electric generator which can
transform kinetic energy into
electric energy. The steam exits the
turbine and, as it is still hot, it must
be cool. Whe it leaves the turbine, it
reaches a condensation tank and
becomes liquid, so that we can put it
back in the circuit.

15. Bibliography
 energia-nuclear.net/
 es.wikipedia.org/wiki/Energía_nuclear
 http://www.inza.com/ainoa/nuclear2.swf
 http://energia-
nuclear.net/es/como_funciona_la_energia_nuclear.ht
ml