Emergency Class 1
Emergency Class 1 : A set of conditions that warrant a similar immediate emergency response. This is the term used for communicating to the response organizations and the public the level of response needed. The events that belong to a given emergency class are defined by criteria specific to the installation, source or practice, which if exceeded indicate classification at the prescribed level. For each emergency class, the initial actions of the response organizations are predefined. The Agency defines three emergency classes, namely (in order of increasing severity) alert, site area emergency and general emergency. In alphabetical order: Alert: An event involving an unknown or significant decrease in the level of protection for the public or on-site personnel. When an alert is declared, the state of readiness of the on-site and off-site response organizations is increased and additional assessments are made. General Emergency: An event resulting in an actual release, or substantial probability of a release, requiring implementation of urgent protective actions off-site. This includes: (1) actual or projected damage to the reactor core or large amounts of spent fuel; or (2) releases off-site resulting in doses exceeding intervention levels for urgent protective actions within hours. When a general emergency is declared, urgent protective actions are recommended immediately for the public near the facility. Site Area Emergency: An event resulting in a major decrease in the level of protection for the public or on-site personnel. This includes: (1) a major decrease in the level of protection provided to the reactor core or large amounts of spent fuel; or (2) conditions where any additional failures could result in damage to the reactor core or spent fuel; or (3) high doses on-site. When a site area emergency is declared, preparations should be made to take protective actions off-site and to control the doses to on-site personnel
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