Operation Manual

R
Becquerel < > µSv/h
Conversion of Becquerel (activity) into µSv/h (dose rate)
The relationship between Becquerel (activity, i.e. the measure of the decay in the atom) and micro-
sievert per hour (dose rate, i.e. the measure of the radiation at the device):
 The values apply to a point source at a distance of 1m from the device
Cs-137 at a distance of 1m with shield open
1 GBq 86 µSv/h 100 µSv/h 1.17 GBq
100 MBq 8.6 µSv/h 10 µSv/h 117 MBq
10 MBq 0.86 µSv/h 1 µSv/h 11.7 MBq
Cs-137 at a distance of 1m with shield closed
1 GBq 81 µSv/h 100 µSv/h 1.24 GBq
100 MBq 8,1 µSv/h 10 µSv/h 124 MBq
10 MBq 0.81 µSv/h 1 µSv/h 12.4 MBq
Co-60 at a distance of 1m with shield open
1 GBq 372 µSv/h 100 µSv/h 0.27 GBq
100 MBq 37.2 µSv/h 10 µSv/h 27 MBq
10 MBq 3.72 µSv/h 1 µSv/h 2,7 MBq
Co-60 at a distance of 1m with shield closed
1 GBq 339 µSv/h 100 µSv/h 0.30 GBq
100 MBq 33.9 µSv/h 10 µSv/h 30 MBq
10 MBq 3.39 µSv/h 1 µSv/h 3.0 MBq
Tc-99m at a distance of 1m with the shield open
1 GBq 13 µSv/h 100 µSv/h 7.96 GBq
100 MBq 1.3 µSv/h 10 µSv/h 796 MBq
10 MBq 0.13 µSv/h 1 µSv/h 79.6 MBq
Tc-99m at a distance of 1m with the shield closed
Measurement not possible, dose rate too low
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