Long-term behaviour of engineered barriers used in surface disposal. 1: Safety functions and treatment of uncertainty

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Abstract

Repository safety assessment (SA) requires defensible assumptions about the future state of engineered barriers (EB). In this study, a reference scenario is presented that describes the gradual EB degradation by means of a step function. To address uncertainties about the assumptions of the future EB state used in the reference scenario, “what-if” scenarios were developed. The analysis of long-term EB performance also included calculations with two different conceptual models characterized by homogeneous or heterogeneous flow. Finally, consequence analysis were done with best estimate parameter values but also with variations of parameters according to specific distribution functions.

Details

Original languageEnglish
Title of host publicationInternational Conference on the Safety of Radioactive Waste Disposal. Contributed papers.
Place of PublicationTokyo, Japan
Pages391-394
Publication statusPublished - Oct 2005
EventInternational Conference on the Safety of Radioactive Waste Disposal 2005 - IAEA - International Atomic Energy Agency, Tokyo, Japan
Duration: 3 Oct 20057 Oct 2005

Conference

ConferenceInternational Conference on the Safety of Radioactive Waste Disposal 2005
CountryJapan
CityTokyo
Period2005-10-032005-10-07

Keywords

  • LILW disposal, safety assessment methodology, safety functions, engineered barriers, degradation mechanisms, uncertainty analysis

ID: 350923