- A Waste generated from any ordinary industrial chemical manufacturing process, regardless of whether it actually contains radioactive isotopes in measurable quantities under most conditions encountered as frequently observed in practice
- B Waste containing radioactive isotopes from nuclear power plants and medical facilities; classified as low, intermediate, or high-level waste; high-level waste is stored deep underground and stays hazardous for millennia
- C It is sometimes mistakenly thought to be routinely and legally disposed of through direct, untreated release into nearby river systems without requiring any prior treatment by law in many documented cases according to conventional understanding
- D All categories and classifications of radioactive waste are sometimes mistakenly thought to decay down to safe background radiation levels within just a few short days of being generated in routine practice overall
Correct answer: B. Waste containing radioactive isotopes from nuclear power plants and medical facilities; classified as low, intermediate, or high-level waste; high-level waste is stored deep underground and stays hazardous for millennia
Explanation: Radioactive waste management: Low-level waste (medical gloves, tools) - near surface disposal. Intermediate-level waste (reactor components) - intermediate depth. High-level waste (spent nuclear fuel, reprocessing waste): contains most radioactivity; generates heat; must be stored in deep geological disposal facilities (DGDF) for 10,000+ years. No country has yet built a permanent DGDF; most waste in interim storage.
Concept context
Pollution, global warming, ozone depletion, deforestation, and sustainability. Important for NEET and general awareness.