Preparedness for the Long-Term Management of Contaminated Freshwater Bodies and Catchments. A Decision making exercise with the MOIRA system

摘要

In the mid-long-term after a nuclear accident, the contamination of drinking water sources, fish andother aquatic foodstuffs, irrigation supplies and people’s exposure during recreational activities may createconsiderable public concern, even though dose assessment may in certain situations indicate lesser importancethan for other sources, as clearly experienced in the aftermath of accidents like Chernobyl. The MOIRA system isdesigned to allow for a reliable assessment of the long-term evolution of the radiological situation and of possiblealternative rehabilitation strategies, including an objective evaluation of their social, economic and ecologicalimpacts in a rational and comprehensive manner. MOIRA also features a decision analysis methodology, makinguse of multi-attribute analysis, which can take into account the preferences and needs of different types ofstakeholders. A decision-making exercise regarding such problems, in which MOIRA has been be used as adecision support tool, was organised in Spain involving the organizations responsible for emergency managementand the affected services, as well as local and regional stakeholders and several international observers. Thesystem resulted very helpful in assessing the overall situation and the alternative management strategies and alsofacilitated the interaction between agencies which reached a better common understanding of all related issues.