ASNT Industrial Radiography Radiation Safety Practice Test

What is the maximum curie strength permitted for an iridium-192 source in a type A exposure device?

1. 15.0 Ci

2. 27.0 Ci

3. 30.0 Ci

4. 35.0 Ci

The correct answer is: 27.0 Ci

In industrial radiography, iridium-192 is commonly used as a radioactive source, and it has specific regulatory limits regarding the maximum activity permitted in exposure devices. For Type A exposure devices, the maximum strength for an iridium-192 source is established to ensure safety during operation while still allowing effective radiographic imaging. The limit of 27.0 curies (Ci) for iridium-192 sources in Type A devices is determined by guidelines and regulations set by authorities such as the Nuclear Regulatory Commission (NRC) and other standards applicable to radiography practices. This limit is significant because exceeding it can pose safety risks to both operators and personnel in the vicinity, underscoring the importance of adhering to established safety protocols. Understanding this limit helps operators effectively manage radiation exposure and maintain compliance with safety regulations, leading to safer work environments in radiographic operations.