What should an operator do immediately after a road accident involving an exposure device where the survey meter is damaged?

In the scenario of a road accident involving an exposure device with a damaged survey meter, the operator should assume that the source is fully exposed and take immediate action to restrict and post the area. This approach aligns with the precautionary principle in radiation safety, prioritizing the protection of individuals and the public from potential radiation exposure.

When a survey meter is damaged, the operator cannot accurately assess the status of the radioactive source contained within the device. Therefore, assuming that the source is fully exposed mitigates the risk of accidental exposure to individuals nearby. This means that the operator must cordon off the area to prevent unauthorized access and to ensure that no one inadvertently approaches a potentially dangerous situation.

Furthermore, taking this precaution allows the operator to gather essential information and prepare to manage the incident appropriately, including notifying the relevant authorities and emergency response teams. It highlights the importance of assuming a worst-case scenario in radiation emergencies until proven otherwise to ensure safety and protection.