In April 2011 the European Platform on Preparedness for Nuclear and Radiological
Emergency Response and Recovery (NERIS-TP) decided to expand the two European Decision
Support Systems JRodos and ARGOS with respect to the new ICRP-103 recommendations. The
extension should be applicable for nuclear accidents and radiological emergencies and
comprise a new screening model, the possibility to optimise dose reducing actions with the
models ERMIN (European Model for Inhabited Areas) and AGRICP (Agricultural Countermeasure
Program), respectively, and scenario preparation tools to support the user in defining
countermeasure strategies. This paper describes the screening model that was developed by
the authors and is foreseen for realisation and inclusion in JRodos and ARGOS in
2012/2013.