Radiation Safety Practice Exam

What is the total activity of thorium-232 in display equipment with NSN 1240-01-063-1351?

1. 1.84E 2

2. 1.84E 3

3. 1.84E 4

4. 1.84E 5

The correct answer is: 1.84E 3

The total activity of thorium-232 in the display equipment specified is 1.84E 3, which denotes an activity of 1.84 x 10^3 disintegrations per second, or Becquerels (Bq). Understanding the context of the question involves knowing that thorium-232 is a common radioactive isotope used in certain types of display equipment due to its luminescent properties. In this situation, it is important to appreciate how the activity level reflects the amount of radioactive material present in the equipment. The value represents the rate at which thorium-232 decays, which is a key consideration in radiation safety practices. An accurate assessment of this activity is essential for properly managing the radiological safety of the equipment during its operation and disposal. The other numerical values given represent different levels of activity, but only 1.84E 3 correctly aligns with the known specification for the piece of equipment in question. By selecting this value, one acknowledges the importance of using established safety limits and guidelines concerning radioactive materials. Understanding the specific activity of isotopes like thorium-232 is critical in assessing potential exposure risks and implementing appropriate safety measures.