54733-10BA2L
1 – 130 02.2017
10 Source Replacement Volume 1
Calculation example A single part rod source with an activity of 400 MBq (approx.
11 mCi) has to be replaced. Using the above assumptions concern-
ing distance and time and the above equation, we get the following
result:
D = 400 x 0.15 = 60µSv
The radiation exposure in the vicinity of the shielding was previously
calculated to be 10 µSv. The total radiation exposure including
mounting and dismantling can then be estimated as being 70 µSv
for a single part source.
If the above assumptions do no apply, the calculations have to be
corrected accordingly. Actually, it can only be another working time
which has a proportional effect on the result of the calculated dose
rate.
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