The primary objective of incorporating biological shielding in a nuclear reactor is to provide defense against_______________?
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Answer: D. neutrons and gamma rays
Explanation
Nuclear fission reactions release highly penetrating fast neutrons and high-energy gamma rays. Biological shielding is engineered specifically to absorb and attenuate these dangerous radiations. This protective barrier safeguards operating personnel from harmful ionizing radiation exposure. Ionizing radiation damages living biological tissue by disrupting cellular DNA and molecular structures. Neutrons are highly penetrating uncharged particles requiring hydrogenous materials for moderation. Gamma rays are high-energy electromagnetic radiation requiring dense materials like lead or concrete.
Nuclear reactor containment buildings incorporate thick concrete biological shields around the core. Radiation protection standards limit occupational exposure doses for all nuclear power plant workers. Continuous radiation monitoring ensures shield integrity during full power reactor operations. X-rays are generated by medical or industrial machines rather than being primary reactor emissions. Infra-red rays represent thermal radiation rather than hazardous nuclear ionizing radiation. Electrons and alpha particles have very low penetration ranges and are stopped by primary barriers.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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