Security of Radioactive Sources in Radiation Facilities

i.e. Aggregate A/D = ∑ n ( ∑ i A i, n /D n )
where, A i, n = activity of each individual source ‘i’ of radionuclide ‘n’ in the aggregation of
sources; and D n = D value for radionuclide ‘n’.
This principle will apply to situations in which radioactive sources are in close proximity to
each other in the same room or building, such as in a source manufacturer’s facility or in a
storage facility.
c Exempt quantities as notified under the Atomic Energy (Radiation Protection) Rules, 2004.
The above source categorisation is an important consideration in the evaluation of the
security requirements and the design of security provisions which should be carried
out by the licencee.
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