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[en] The results of equivalent dose calculations for nuclear waste repositories in deep geological formations exhibit significant uncertainty margins due to the current lack of detailed knowledge regarding the different components of the safety assessments that have been carried out to date. It is therefore particularly important that, in order to define areas in which uncertainty margins need to be reduced if the credibility of results is to be enhanced, the sensitivity of results obtained to date with regard to the following be determined as accurately as possible: . characteristics of the scenarios considered; . models and numerical techniques employed; . values assigned to the parameters used in calculations. A number of studies varying substantially in scope, some carried out as part of the PAGIS and PACOMA projects run by the Commission of the European Communities, have attempted to answer these questions. This paper describes: . the major lines of approach adopted within this framework; and . some of the results obtained, by way of example. 7 refs., 2 figs., 1 tab
[fr]
Les resultats des calculs des equivalents de dose associes a un stockage de dechets en formation geologique profonde comportent une marge importante d'incertitude due en particulier a l'etat de nos connaissances concernant les diverses composantes des evaluations realisees. Aussi, pour definir les domaines ou un effort de reduction de cette incertitude est necessaire pour assurer une meilleure credibilite des resultats, est-il particulierement important de determiner, autant que possible, la sensibilite des resultats obtenus: . aux caracteristiques des scenarios consideres, . a celles des modeles et des techniques numeriques utilises, . aux valeurs retenues pour les differents parametres intervenant dans les calculs. Afin d'etre en mesure de repondre a ces questions, un certain nombre d'etudes, de nature fort diverse, ont ete realisees, dont certaines dans le cadre des projets PAGIS et PACOMA de la Commission des Communautes Europeennes. Nous nous proposons de presenter ici: . d'une part, les grandes lignes de l'approche utilisee dans ce cadre, . d'autre part, a titre d'illustration, certains resultats obtenusSource
Nuclear Energy Agency, 75 - Paris (France); 1024 p; ISBN 92-64-0334-3; 
; 1990; p. 649-661; Organisation for Economic Co-operation and Development; Paris (France); Symposium on safety assessment of radioactive waste repositories; Symposium sur l'analyse de la surete des depots de dechets radioactifs; Paris (France); 9-13 Oct 1989
; 1990; p. 649-661; Organisation for Economic Co-operation and Development; Paris (France); Symposium on safety assessment of radioactive waste repositories; Symposium sur l'analyse de la surete des depots de dechets radioactifs; Paris (France); 9-13 Oct 1989