radiation dosimetry model ERICA Tool http://www.nrpa.no The ERICA (Environmental Risk from Ionising Contaminants: Assessment and Management) Tool is a freely available software implementing a tiered environmental risk assessment framework for evaluating the impact of radioactive contamination on non-human biota in aquatic and terrestrial ecosystems. Underpinned by the FREDERICA database, it calculates dose rates to reference organisms and compares them against risk characterisation ratios to assess ecological risk. The most recent version (Brown et al., 2016) introduced improvements to the reference organism database and dose conversion coefficients. Located at Norwegian Radiation Protection Authority. Brown J.E. et al., J. Environ Radioact, 153, pp. 141-148 (2016) Paul Schofield