c
2.
practices that add to natural background radiation.
These dose
limitations exclude exposures received in the course of medical
procedures.
(These same qualifications with regard to natural
backgmund and medical procedures are applied to FRC and NCRP
recommendations, )
ICRP developed the concept of "acceptable risk."
Teta
Unless man
wishes to dispense with activities involving exposures to ionizing
radiation, he must recognize that there is a degree of risk and
limit the radiation dose to a level at which the assumed risk is
deemed to be acceptable to the indivadal and to society because of
the benefits derived from such activities.
For planned exposures of individuals and populations, the ICRP
has recommended the term “dose limit."
It is not desirable to expose members of the public to doses as
high as those considered to be acceptable for radiation workers
because children are involved, members of the public do not make the
choice to be exposed, and members of the public are not subject to
selection, supervision and monitoring, and are exposed to the risks
of their own occupations.
For planning purposes, dose limits for
members of the public are set a factor of ten below those for
radiation workers.
——
The dose
limits for members of the public are
a somewhat theoretical concept intended for planning purposes.
It
will seldom be possible to ensure that no single individuel exceeds
this dose limit.
Even when individual exposures are sufficiently
low so that the risk to the individual is acceptably small, the sum