What should be done first when a radiation alert is detected?

When a radiation alert is detected, securing the area is the critical first step. This action is necessary to ensure the safety of personnel and the public. By securing the area, you prevent unauthorized access and potential exposure to radiation, allowing for a controlled environment in which to assess the situation.

Once the area is secured, responders can safely investigate the source of the radiation and determine the appropriate actions based on the findings. Alerting local authorities and continuing with a search are important procedures but should follow the securing of the area to ensure that no additional risks are introduced during the response. The priority in emergency situations is always the protection of individuals in the vicinity and mitigating exposure to hazardous materials.