Information on radioisotope dispersal is critical to enable informed public policy decision-making regarding how best to respond to an emergency. CNL research and development focuses on improving the understanding of radionuclide migration in the environment after an accident or other non-normal event. It includes enhancing methods for modelling and rapid detection and measurement of radionuclides in the environment and investigating ways to reduce the source-term of radioactive releases to the environment. CNL also supports government stakeholders at all levels, academia, and industry with technology and realistic, comprehensive training and evaluation environments to build capability in emergency response and material security scenarios. CNL is a trusted biodosimetry partner for the Government of Canada, supporting national efforts to rapidly and accurately measure radiological dose to individuals exposed during a nuclear or radiological event.