The objective of this joint WGAMA-WPNEM activity was to benchmark software tools used to estimate consequences of accidents at nuclear facilities. Two aspects of accident consequences were considered: amounts of radioactive material releases as well as public doses resulting from such releases. This activity and the recommended follow-up steps are expected to promote better understanding of the existing predictive capability currently available in a number of organisations to rapidly assess and recommend protective measures during nuclear emergencies. Several recommendations are provided to direct future efforts in this area. The final deliverable of the activity was set to be a report summarising the benchmark study.