International Atomic Energy Agency (IAEA)

Biota Working Group

The Biota Working Group http://www-ns.iaea.org/projects/emras/emras-biota-wg.htm (BWG)was formed in 2004 by the IAEA as part of the Environmental Modelling for Radiation Safety (EMRAS)programme to address the gap of little validation and comparison of the different models and approaches being used and developed to estimate the radiation exposure on wildlife. The primary objective of the BWG, was: to improve Member State's capabilities for protection of the environment by comparing and validating models being used, or developed, for biota dose assessment (that may be used) as part of regulatory process of licensing and compliance monitoring of authorised releases of radionuclides.

In total, 15 models and approaches have been applied to one or more of the exercises conducted by
the BWG. The models/approaches applied encompass those being developed, and in some instances,
used in a regulatory context, in Belgium, Canada, France, Lithuania, Russia, the UK and the USA, as
well as the outputs of recent EC EURATOM programmes. The participating models included those
available to any interested user (RESRAD-BIOTA, the ERICA Tool, England and Wales Environment
Agency R&D 128 and FASSET(see http://www.ceh.ac.uk/protect/ pages/env protect radio.html for links
to documentation and/or software for these approaches)) and in-house models being used/developed by
various BWG participants (see IAEA \[2\] for a description of all participating models). Group members
included modellers, regulators, industry and researchers.