A worker receives an absorbed dose of 0.50 µGy of gamma radiation (weighting factor 1) and 0.020 µGy from alpha radiation (weighting factor 20). What is the total equivalent dose?
Answer and explanation
Correct answer: B. 0.90 µSv
- Step 1: H = D × wR for each type.
- Step 2: Gamma: 0.50 × 1 = 0.50 µSv. Alpha: 0.020 × 20 = 0.40 µSv.
- Step 3: Total = 0.50 + 0.40 = 0.90 µSv.
Answer
0.90 µSv.
Why not the others: 0.52 µSv: the weighting factors were ignored. 10.4 µSv: both doses were multiplied by 20. 0.50 µSv: the alpha contribution was ignored.
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