The present publication has been developed with the help of experts from regulatory, operation and engineering organizations, all with practical experiences in the field of fire protection of nuclear power plants. The publication outlines practices for inspecting the fire protection measures at nuclear power plants in accordance with Safety Series No. 50-SG-D2, Fire protection in Nuclear Power Plants, and includes a comprehensive fire fighting capability available at operating nuclear power plants. The book will be useful not only to regulators and safety assessors but also to operators and designers.