PAGIS & PACOMA: Performance Evaluations of Deep Geological Disposal. Results and Conclusionsby N. Cadelli, Commission of the European, Communities, Belgium,
G. Cottone, Commission of the European, Communities, Belgium,
Abstract: Two coordinated research projects were undertaken by the Commission of the European Communities to study the safety performances of geological radwaste disposal systems in the post-operational phase: PAGIS (ended in 1988) for vitrified HLW in clay, granite, salt and submarine sediments and PACOMA (to be complete in Spring 1990) for alpha and MLW in continental formations. The paper, which is focused on PAGIS, summarizes the objectives, the main features and the most significant results and conclusions for deterministic and stochastic calculations. The two complementary approaches were implemented to evaluate dose rates vs. time and their expectation values and to identify the predominant radionuclides and pathways to man; they also allowed uncertainty and sensitivity analyses to be carried out. The main conclusion is that in no case doubts have been arisen about the safety disposal of radwaste into any of the geological options investigated, if appropriate sites are selected and the repositories are designed and builts according to sound engineering principles. Further improvements in the methodology are also presented and discussed.
Subject Headings: Radioactive wastes | Geology | Sensitivity analysis | Waste disposal | Safety | Site investigation | Clays | Salts
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