PACE Probabilistic Accident Consequence Evaluation Software

World leading radiation protection advice and services

It is expected that all radiation protection services currently provided by the Centre for Radiation, Chemical and Environmental Hazards (CRCE) within PHE will transfer into the new UK Health Security Agency (UKHSA) with effect from October 2021. Please be assured that this transition does not affect arrangements with clients; all contracts for services and appointments of PHE in a radiation protection expert capacity will remain valid. Clients will be notified when the transition is complete and the change of name comes into effect.

Public Health England is the UK's primary authority carrying out research to advance knowledge about protection from the risks of radiation. We provide world-leading advice, training and services for the widest range of radiation protection safety professionals and organisations.


PACE (Probabilistic Accident Consequence Evaluation) is a tool for performing Level-3 Probabilistic Safety Analysis (PSA). Level-3 PSA is the evaluation of off-site consequences given a release of radioactive material to the atmosphere from a facility.