Very High Radiation Areas are posted with which term?

• A. Danger
• B. Grave Danger
• C. Warning
• D. Caution

Answer: (B)

Very High Radiation Areas are given the strongest warning sign to reflect the extreme danger of exposure. The phrase “Grave Danger” communicates that entering the area could result in life-threatening exposure in a very short time, so access must be tightly controlled and limited to individuals with explicit authorization, proper training, and protective measures. This level of warning is meant to prompt stringent controls—adhere to procedures, use dosimeters, minimize time spent in the area, maintain maximum possible distance from the source, and rely on shielding as needed. Other terms like Danger, Warning, or Caution indicate progressively lower levels of hazard or less stringent controls, so they aren’t appropriate for spaces where the risk is this severe. If you see a sign with Grave Danger, treat the area as requiring special authorization and safety measures before entering.