Nuclear Reactions Flashcards
1
Q
Why must total amount of U235 in reactor be greater than Critical size
A
Rate of neutron production > rate of neutron loss
2
Q
Why must total amount of U235 in a rod single rod be less than the critical size
A
Prevent uncontrolled fission
3
Q
Materials used and purpose of moderator
A
Graphite / heavy water
Slow neutrons so they can’t be absorbed by U238
