Preface. Introduction. General. Purpose and scope of this document. Concepts, Quantities and Basic Principles for Intervention. The basic quantities. Special concepts for intervention. Justification.

Optimisation. Intervention. Application of the Principles for Protective Actions. Categorisation of Radiological Emergencies for Planning Intervention. Types of radiological emergencies. Exposure pathways. Temporal and spatial aspects of radiological emergencies. Derivation of Intervention Levels.

Intervention at the source. Control of access. Sheltering. Evacuation. Administration of stable iodine. Personal decontamination. Injury management. Intervention in food chain and drinking water.

Relocation. Decontamination of structures and land surfaces. Emergency Response Planning. General. The role of intervention levels in emergency response planning. Lost sources. Summary of Recommended Intervention Levels. References.

Annex A: Protection of individuals who are involved in intervention. Annex B: The control of foodstuffs - an example of generic optimisation. Annex C: Relocation - an example of generic optimisation. 2 illus, 19 line drawings.