Question

Question 20 (2 points)
Nuclear fission reactions can either be controlled or uncontrolled. Decide if each description or picture is describing a controlled or uncontrolled fission reaction.

Column A
1.
The type of nuclear fission that is used in nuclear power plants.:
The type of nuclear fission that is used in nuclear power plants.
2.
The type of nuclear fission reaction that occurs in atomic bombs.

:
The type of nuclear fission reaction that occurs in atomic bombs.

3.




In this type of fission reaction, each neutron that is produced is allowed to split another nucleus creating a chain reaction.

:




In this type of fission reaction, each neutron that is produced is allowed to split another nucleus creating a chain reaction.

4.




A type of fission reaction where some of the neutrons produced are absorbed by control rods and are not allowed to split another nucleus.

:




A type of fission reaction where some of the neutrons produced are absorbed by control rods and are not allowed to split another nucleus.

Column B
a.Controlled fission reaction
b.Uncontrolled fission reaction

Answer 1

1. a Controlled fission reaction
2. b Uncontrolled fission reaction
3. b Uncontrolled fission reaction
4. a Controlled fission reaction