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Oughton, D.H., Aguero, A., Avi=
la, R., Brown, J.E., Copplestone, D., Gilek, M.
Addressing uncertainties in the ERICA Integrated Approach.
J. Eviron. Radioact=
., 99, 1384-1392.
Like any complex environmental problem, ecological risk assessment of th=
e impacts of ionising radiation
is confounded by uncertainty. At all stages, from problem formulation thro=
ugh to risk characterisation, the assessment is dependent on models, scenar=
ios, assumptions and extrapolations. These include technical uncertainties =
related to the data used, conceptual uncertainties associated with models a=
nd scenarios, as well as social uncertainties such as economic impacts, the=
interpretation of legislation, and the acceptability of the assessment res=
ults to stakeholders. The ERICA Integrated Approach has been developed to a=
llow an assessment of the risks of ionising radiation, and includes a numbe=
r of methods that are intended to make the uncertainties and assumptions in=
herent in the assessment more transparent to users and stakeholders. Throug=
hout its development, ERICA has recommended that assessors deal openly with=
the deeper dimensions of uncertainty and acknowledge that uncertainty is i=
ntrinsic to complex systems. Since the tool is based on a tiered approach, =
the approaches to dealing with uncertainty vary between the tiers, ranging =
from a simple, but highly conservative screening to a full probabilistic ri=
sk assessment including sensitivity analysis. This paper gives on overview =
of types of uncertainty that are manifest in ecological risk assessment and=
the ERICA Integrated Approach to dealing with some of these uncertainties.=