Description The ICRP, in its 1990 Recommendations, divided situations affecting radiation exposure of individuals into two broad categories: practices
and intervention. The basic principles of radiation protection are applied to these categories in different ways. In the case of practices,
the principles are applied to the addition of radiation risk caused by the introduction or modification of practices, whilst for intervention
they are applied to the subtraction or reduction of pre-existing radiation exposure. Radiation exposure which might result from the introduction
of a practice is also divided into two broad categories: normal exposure and potential exposure. Normal exposure is that exposure which
can reasonably be expected to occur, i.e., the exposure is predicted to occur with a probability of one or near one, independent of the
time when the exposure occurs. Potential exposure is exposure that, while not certain to occur, can be anticipated as a result of introducing
or modifying a practice and to which a probability of occurrence can be assigned. The purpose of this report is to elaborate upon the
principles and objectives of ICRP recommendations as they relate to potential exposure; explain basic concepts, terminology and methodologies
associated with application of the recommendations; and to provide general guidance on its practical application. The report is intended
to provide a basis for the preparation of more detailed guidance related to specific practices.
Audience
For regulatory and advisory agencies at regional, national and international levels; management bodies with responsibilities for radiological
protection; professional staff used as advisors; and individuals such as radiologists who have to make decisions about the use of ionizing
radiation.
Contents
Introduction. Basic Concepts.
Risk. Probability. Dose response relationship.
The Basis of Radiation
Safety.
Aims. Source- and individual-related assessments. Basic principles.
Protection from Potential
Exposure: Practical Applications.
Justification of practice. Optimisation of radiation safety. Individual health risk
limitation. The role of prevention and mitigation. Assessment techniques. Application in practice. Exclusion of scenarios and event sequences.
Exemption of scenarios and event sequences. Regulation in the context of potential exposures. References. 1 illus, 12 lit refs.
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