Flashcards: Introduction to Nuclear Fission and Fusion — 14 cards

Nuclear fission — definition?

Splitting of a large nucleus releasing energy.

Chain reaction — role?

Self-sustaining process of successive fissions.

Unstable nucleus — role?

Splits upon neutron absorption, releasing neutrons.

Neutron absorption — process?

Nucleus takes in a neutron, increasing instability.

Fission reactors — main component?

Contain uranium fuel, control rods, moderator.

Control rods — function?

Absorb neutrons to control reaction speed.

Moderator — purpose?

Slows neutrons to increase absorption likelihood.

Reactor shielding — purpose?

Protects from harmful radiation.

Nuclear power — advantage?

Produces lots of electricity with low CO2.

Nuclear waste — challenge?

Must be stored safely long-term.

Chernobyl accident — year?

1986, caused by uncontrolled chain reaction.

Chernobyl — cause?

Control rods removed, leading to overheating.

Global use — themes?

Societal, environmental, economic reasons.

Nuclear fusion — process?

Nuclei join to release energy.