Nuclear safety aspects Quiz
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5 questions, one answer each
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1. What is the purpose of the thick concrete around a reactor core?
- A. To slow neutrons for fission
- B. To carry thermal energy to the turbines
- C. To absorb gamma radiation and neutrons
- D. To absorb fission products
2. Why does the core need cooling after the control rods are inserted?
- A. The chain reaction continues at a slower rate
- B. Fission products continue to decay and release thermal energy
- C. The moderator releases stored energy
- D. The control rods become fissile
3. Caesium-137 has a half-life of 30 years. What fraction of a sample remains after 90 years?
- A. 1/3
- B. 1/6
- C. 1/9
- D. 1/8
4. Which waste is stored deep underground in sealed glass and steel containers?
- A. Contaminated clothing
- B. Reactor components
- C. Fuel cladding
- D. Spent fuel and fission products
5. Why is spent fuel moved by remotely controlled machines?
- A. It emits intense ionising radiation
- B. It reacts with air
- C. It is liquid
- D. It would explode if touched