epr-method (2003) - IAEA Publications - International Atomic Energy ...

Practice
Lost /stolen
dangerous source
Contamination from
transboundary
release
Nuclear powered
satellite re-entry
Import of
contaminated food
or material
Threat summary
Lethal doses are possible for persons handling an unshielded
dangerous source (see Glossary and Appendix 8). Lethal doses
and considerable contamination resulting in doses above the
urgent GILs are possible from a ruptured source. A considerable
area can be contaminated due to dispersal by human activities.
Deposition resulting in doses in excess of the relocation GILs and
ingestion GALs is possible at great distances from facilities in
threat categories I or II.
The risk is very small and it will be virtually impossible to limit
the area of concern so that reasonable protective action can be
taken. The handling of debris (external exposure or inadvertent
ingestion) could result in deterministic health effects.
Off site: Uncontrolled (unknowing) use of contaminated steel and
other products could result in doses in excess of the occupational
limits but it is very unlikely that the urgent protective GILs can be
exceeded. Food contamination could exceed the GAL for food
restriction.
Typical threat
category
IV
V
IV
V
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