Answer
The equivalent dose is equal to 1000 millirems.
Work Step by Step
1. Identify the objective.
- Convert from "mrad of alpha radiation" to "millirems".
2. Find the conversion factors and equations.
Biological damage (rem) = Absorbed dose (rad) $\times$ Factor
For alpha radiation: Factor = 20 (page 146)
$1000 millirems = 1 rem$
$1000 mrad = 1 rad$
3. Calculate the value of the dose in millirems:
$50 mrad \times \frac{1rad}{1000mrad} = 0.05 rad$
Biological damage (rem) = $0.05 \times 20 = 1$
$1 rem \times \frac{1000 millirem}{1rem} = 1000 millirem$
