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The probabilistic code LISA (Long term Isolation Safety Assessment) has been used to assess the risk related to the disposal of alpha waste in a geological formation. The code has been modified to take into account waste form properties and leaching processes pertinent to alpha waste produced at fuel reprocessing plants. The exercise refers to a repository in a deep clay formation located at Harwell (U.K.) where some hydrogeological data were available. Radionuclide migration through repository and geological barriers has been simulated together with biosphere contamination. Results of the assessment are presented as dose rate (or risk) distributions; a sensitivity analysis on input parameters has been performed.

Additional information

Authors: QUERCIA F, ENEA, Direzione Sicurezza Nucleare e Protezione Sanitaria, Settore Ambiente Radioprotezione, Divisione Radioattivita Ambientale, Roma (IT);D'ALESSANDRO M, JRC Ispra Estab. (IT);SALTELLI A, JRC Ispra Estab. (IT)
Bibliographic Reference: Report: RT/DISP/87/5 EN (1987)
Availability: Available from ENEA, Direzione Centrale Relazione, Viale Regina Margherita, 125-Roma (IT)
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