Nuclear Fission

Question 1

What happens in Nuclear fission

Answer 1

a uranium - 235 absorbs a neutron to become U-236

This is very reactive and splits into 2 fission fragments and 2 or 3 neutrons

The neutrons will be absorbed by more U-235 and cause more fission

Question 2

What does nuclear fission require

Answer 2

Uranium 235 isotope

Question 3

What is the problem with nuclear waste disposal

Answer 3

fission fragments e.g Xe/Kr are very radioactive

Question 4

If left uncontrolled and a high enrichment of Uranium 235 what happens

Answer 4

MASSIVE CHAIN REACTION

ENERGY UP UP UP

Question 5

In a fission reactor what are the control rods for

Answer 5

control energy output to stop neutrons from one fission rods reacting with U235 in another fission rod

Question 6

In a fission reactor what is the moderator role

Answer 6

slow down neutron so first U235 can absorb it

prevent neutron escaping

Question 7

What is the water/coolant used for in a fission reactor

Answer 7

cool the reactor core and make steam for electricity

Question 8

What is the diff between a nuclear reactor and bomb

Answer 8

reactor has lower percentage of U235 in