Jun Hirouchi has joined the Radiation Assessment Department on a 1 year secondment from the Japan Atomic Energy Agency. Jun is helping improve and consolidate the department's ERMIN model, which estimates dose in urban environments contaminated by accidents, and the consequences of clean-up operations. An important task is to update the ERMIN dose library with new information from ICRP's recent publication 144. Jun is also investigating and comparing ERMIN to the US-EPA Waste Estimation Support Tool (WEST)