There is an updated latest ICRP document entitled Radiological Protection of people and the environment in the event of a large nuclear accident published by the ICRP as the Publication No. 146 (2020). The document is the updated versions of ICRP – 109 and ICRP- 111, which cover emergency exposure situations. This new document provides a much needed framework for protection of people and the environment in Chernobyl and Fukushima line reactor disasters.
The early and intermediate phases of accidents are considered as Emergency exposure situations and the long-term phase is considered as existing exposure situations (ICRP-103). Mitigating the radiological consequences on the humans and the environment are achieved by the justification and optimization principles as discussed in the ICRP. A set of reference levels are recommended for protection of general population, and for the protection of all concerned in the mitigation process. The concerned authorities at national and local level are responsible for implementing radiation monitoring and surveillance programs. The authorities also are responsible to involve all the stakeholders in the emergency preparedness process and management of the successive phases of the accident.