Appendix CRF - Part 3 - Northamptonshire County Council

Radiological Assessment 0820-2
Version 2
demonstrate that non-human species are protected under legislation related to
conservation, for example that derived from the EC Habitats Directive (EC 1992).
There are currently (June 2009) no internationally established criteria for determining
radiological protection of the environment. However, a number of research studies
and regulatory guidance documents have proposed that an incremental dose rate value
of 10 Gyh -1 is appropriate as a screening criterion, although dose rates less than
40 Gyh -1 are unlikely to exert any effect on the reproductive capacity of mammals
and chronic effects for other organisms are unlikely at even greater dose rates
(Copplestone et al. 2002).
An assessment tool developed as part of the ERICA project (Environmental Risk from
Ionising Contaminants: Assessment and Management) has been used to calculate
potential dose rate values. The ERICA assessment tool allows three tiers of
assessment. A Tier 1 assessment has been undertaken and the calculated incremental
dose rate values are below the screening value indicated above. More detailed
assessments (Tier 2 and Tier 3) are therefore not required.
Galson Sciences Limited 27 14 July 2009
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