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[en] The Environmental Protection Agency (EPA) is developing Protective Action Guides (PAGs) for responding to radiological emergencies. The existing interim guidance for plume exposure pathways is 0.01 to 0.05 Sv (1 to 5 rems) whole body dose equivalent and 0.05 to 0.25 Sv (5 to 25 rems) committed dose equivalent to the thyroid from a 2 to 4 day exposure. Interim PAGs for ingestion exposure pathways are 0.015 to 0.15 Sv (1.5 to 15 rems) committed dose equivalent to the thyroid and 0.005 to 0.05 Sv (0.5 to 5 rems) committed dose equivalent to the whole body or any other organ from a one-year exposure. Draft Relocation PAGs have been proposed as a range of 0.01 to 0.05 Sv (1 to 5 rems) committed effective dose equivalent from the first year exposure to deposited radioactive material from all exposure pathways except ingestion of food and water. The guidance (i.e., PAGs for plume, ingestion, and relocation; limits for emergency workers and other persons entering restricted zones; and guidance for development of recovery criteria) is reviewed with regard to status, values, rationale, interpretation and implementation

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[en] The U.S. Federal Government is encouraging, guiding, and assisting State and local Governments in the development of radiological emergency response plans. Several Federal agencies are involved. This report summarizes the efforts of the U.S. Environmental Protection Agency which is responsible for providing guidance and criteria for determining whether protective actions are needed and which protective actions would be most appropriate for accidents involving fixed nuclear facilities and transportation. The report discusses three accident phases for releases: (1) the emergency phase where quick decisions and actions will be required to protect the public from whole-body exposure and inhalation exposure, (2) the intermediate phase where whole-body exposure from deposited materials and ingestion of contaminated food and water will be the critical exposure pathways, and (3) the long-term or recovery phase where low-level direct radiation and food contaminated by uptake or resuspension from the soil would be the critical exposure pathways. Separate Protective Action Guides (PAGs) are being developed for each phase. PAGs for the emergency phase have been established as a range of 1 to 5 rem projected whole-body dose and 5 to 25 rem projected thyroid dose for the population. Emergency phase PAGs for the lung are under development as well as PAGs for the intermediate and long-term phases. Conclusions from studies of evacuation and shelter are provided, and current studies on restorative actions for the long-term phase are discussed. (author)

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