Scientists are developing power stations that use nuclear fusion. The Table compares a fission power station with a fusion power station. Table
| Property | Fission power station | Fusion power station |
|---|---|---|
| Fuel | uranium-235 | deuterium and tritium (types of hydrogen) |
| Energy released from 1 kg of fuel in J\text{J}J | 8.2 × 1013 | 3.4 × 1014 |
| Main products | radioactive nuclei, some with half-lives of thousands of years | helium nuclei, which are not radioactive, and neutrons |
Use the Table to calculate how many times more energy is released from 1 kg of fuel by fusion than by fission.
Explain why the products of a fission power station are a greater long-term hazard than the products of a fusion power station.
Give one similarity and one difference between the processes of nuclear fission and nuclear fusion. Do not use the energy released per kilogram as your difference.
48 exam-style questions on OCR GCSE Physics 6.2 Uses and hazards, covering 6.2.1 Contamination and irradiation, 6.2.2 Half-life and radiation hazards, 6.2.3 Medical uses of nuclear radiation, 6.2.4 Nuclear fission and chain reactions, and 6.2.5 Nuclear fusion. Each one has a worked solution and a mark scheme showing where the marks go.