This book appraises the current understanding of nuclear power plant accidents and the challenges posed to emergency planners. The contributors address the crucial need for real-time monitoring of both the development of the accident and the dispersion of radiation into the atmosphere. They also consider a broad range of other factors and approaches, including emergency action-level guidelines, organizational designs, effective emergency medical response, probabilistic risk analysis, public perceptions of nuclear accident risks, public responses to various warning systems, and the effects of high stress on the behavior of power plant workers.