What should you do immediately if you receive an unexpected high reading on a dosimeter?

When you receive an unexpected high reading on a dosimeter, the appropriate immediate action is to report it to a supervisor and seek further evaluation. This is critical because a high reading may indicate that you have been exposed to a potentially harmful level of radiation, and it is essential to ensure the safety of yourself and others in the vicinity.

By reporting the high reading, you allow trained personnel to assess the situation. They can provide guidance on the necessary steps to take, which may include further monitoring, evacuation of the area, or other safety protocols. This response is vital in maintaining a safe working environment and minimizing potential health risks associated with radiation exposure.

Taking no action or attempting to reset the dosimeter could lead to a failure to address a serious safety issue. Thus, seeking proper evaluation and guidance is the responsible and safety-oriented approach in this scenario.