What is the standard annual effective dose limit for an adult radiation worker?

What is the standard annual effective dose limit for an adult radiation worker?

• A. 1 millisievert
• B. 6 millisievert
• C. 20 millisievert
• D. 100 millisieverts in 5 years

Answer: (C)

Exposure limits distinguish between workers and the general public. For an adult radiation worker, the standard annual effective dose limit is 20 millisieverts per year, typically averaged over defined periods, with no single year exceeding 50 millisieverts and a five-year total not to exceed 100 millisieverts. This means the average burden should stay around 20 mSv each year. The 1 mSv figure is the public exposure limit, not for workers; 6 mSv isn’t a recognized standard limit; and 100 mSv in 5 years refers to a five-year total, not the yearly cap. Therefore, 20 millisieverts per year is the correct annual limit.

Exposure limits distinguish between workers and the general public. For an adult radiation worker, the standard annual effective dose limit is 20 millisieverts per year, typically averaged over defined periods, with no single year exceeding 50 millisieverts and a five-year total not to exceed 100 millisieverts. This means the average burden should stay around 20 mSv each year. The 1 mSv figure is the public exposure limit, not for workers; 6 mSv isn’t a recognized standard limit; and 100 mSv in 5 years refers to a five-year total, not the yearly cap. Therefore, 20 millisieverts per year is the correct annual limit.