crossword

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Across
  1. 4. Radioactive
  2. 6. One
  3. 9. Exclusion
  4. 10. Contamination
  5. 11. Environmental
  6. 12. External
Down
  1. 1. Requirements
  2. 2. Reactor
  3. 3. Anticontamination
  4. 5. Potable
  5. 7. Releasing
  6. 8. Secondary