Question

shortb answers only define nuclear energy? what are the advantages and disavantages of nuclear energy ? how do nuclear fission amd fusion differ? what are the main fuelsources for nuclear fission and nuclear fusion?

Answer 1

1) Define nuclear energy
- Energy released from atomic nuclei by fission (splitting) or fusion (combining).

2) Advantages (short)
- Very high energy density
- Low CO2 emissions during operation
- Reliable baseload power
- Small land footprint vs many renewables

3) Disadvantages (short)
- Radioactive waste (long‑lived)
- Risk of severe accidents
- High capital, long build/decommissioning costs
- Nuclear proliferation risk
- Limited current high‑grade fuel supply (for conventional reactors)

4) How fission and fusion differ
- Fission: heavy nucleus splits into smaller nuclei, releases neutrons and energy, can sustain a chain reaction.
- Fusion: light nuclei combine into a heavier nucleus, requires extreme temperature/pressure, releases more energy per unit mass and produces fewer long‑lived wastes (but high neutron flux and engineering challenges).

5) Main fuel sources
- Fission: uranium-235 (enriched or in nature), plutonium-239 (from reactors), thorium-232 → uranium-233 (breeding).
- Fusion: hydrogen isotopes — deuterium (D) and tritium (T) (D–T is primary), also D–D, helium‑3 and proton–boron-11 in advanced concepts.