Emergency Planning Zones (EPZ) 7
Emergency Planning Zones (EPZ) 7 : Areas around a facility for which planning is needed to ensure prompt and effective actions are taken to protect the health and safety of the public if an accident or disaster occurs. In the Radiological Emergency Preparedness Program, the two EPZs are: Plume Exposure Pathway (10-mile EPZ): A circular geographic zone (with a 10-mile radius centered at the nuclear power plant) for which plans are developed to protect the public against exposure to radiation emanating from a radioactive plume caused as a result of an accident at the nuclear power plant. Ingestion Pathway (50-mile EPZ): A circular geographic zone (with a 50-mile radius centered at the nuclear power plant) for which plans are developed to protect the public from the ingestion of water or food contaminated as a result of a nuclear power plant accident. In the Chemical Stockpile Emergency Preparedness Program (CSEPP), the EPZ is divided into three concentric circular zones: Immediate Response Zone (IRZ): A circular zone ranging from 10 to 15 kilometers (6 to 9 miles) from the potential chemical event source, depending on the stockpile location on-post. Emergency response plans developed for the IRZ must provide for the most rapid and effective protective actions possible, because the IRZ will have the highest concentration of agent and the least amount of warning time. Protective Action Zone (PAZ): An area that extends beyond the IRZ to approximately 16 to 50 kilometers (10 to 30 miles) from the stockpile location. The PAZ is that area where public protective actions may still be necessary in case of an accidental release of chemical agent, but where the available warning and response time is such that most people could evacuate. However, other responses (e.g., sheltering) may be appropriate for institutions and special populations that could not evacuate within the available time. Precautionary Zone (PZ): The outermost portion of the EPZ for CSEPP, extending from the PAZ outer boundary to a distance where the risk of adverse impacts to humans is negligible. Because of the increased warning and response time available for implementation of response actions in the PZ, detailed local emergency planning is not required, although Consequence Management planning may be appropriate
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