ASNT Industrial Radiography Radiation Safety Practice Test

If a source or exposure device shows a wipe result exceeding 0.005 μCi (185 Bq), what must the licensee do?

1. Monitor it continuously

2. Notify the regulatory body

3. Immediately remove it from service

4. Conduct a follow-up test

The correct answer is: Immediately remove it from service

When a source or exposure device shows a wipe test result exceeding the threshold of 0.005 μCi (185 Bq), it indicates that there is a potentially significant contamination that could pose a safety risk. In such cases, it is essential for the licensee to ensure the safety of the environment and personnel by immediately removing the device from service. This prompt action helps to prevent any further exposure and allows for a thorough investigation and cleaning or safe disposal of the source. Removing the device from service is a crucial first step to control the situation. After removal, further actions, such as notifying the regulatory body, conducting follow-up testing, or continuous monitoring, may also be required to ensure compliance with safety standards. However, the immediate response is to eliminate the risk by taking the device out of operation.