QUALITY ASPECTS OF DETERMINING KEY ROCK PARAMETERS FOR THE DESIGN AND PERFORMANCE ASSESSMENT OF A REPOSITORY FOR SPENT NUCLEAR FUEL

Aspects de qualité dans la détermination des paramètres principaux de roche pour la conception et l'évaluation d'exécution d'un dépôt pour le carburant nucléaire usé. In planning for the appropriate disposal of radioactive waste, it is necessary to understand and predict the long-term changes that take place in a final waste repository and how these changes can influence the repository's ability to maintain adequate isolation of the spent nuclear fuel. The value of performing detailed measurement system analyses and interlaboratory comparisons as important means of providing confidence in test results is demonstrated for two key mechanical and thermal bedrock parameters. Systematic measurement quality assurance makes it possible to identify the degree the variations in measurement data depend on actual natural variability in the rock mass as opposed to uncertainties from the laboratory testing