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

Dirk Mallants; Geert Volckaert; Wim Cool

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

Dirk Mallants, Geert Volckaert, Wim Cool

Research output › peer-review

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.

Original language	English
Title of host publication	International Conference on the Safety of Radioactive Waste Disposal. Contributed papers.
Place of Publication	Tokyo, Japan
Pages	391-394
State	Published - Oct 2005
Event	International Conference on the Safety of Radioactive Waste Disposal 2005 - IAEA - International Atomic Energy Agency, Tokyo Duration: 3 Oct 2005 → 7 Oct 2005

Conference

Conference	International Conference on the Safety of Radioactive Waste Disposal 2005
Country/Territory	Japan
City	Tokyo
Period	2005-10-03 → 2005-10-07

Cite this

@inproceedings{b998e2ba54224402abbe5daa4ed7d299,

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

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.",

keywords = "LILW disposal, safety assessment methodology, safety functions, engineered barriers, degradation mechanisms, uncertainty analysis",

author = "Dirk Mallants and Geert Volckaert and Wim Cool",

note = "Score = 3; International Conference on the Safety of Radioactive Waste Disposal 2005 ; Conference date: 03-10-2005 Through 07-10-2005",

year = "2005",

month = oct,

language = "English",

pages = "391--394",

booktitle = "International Conference on the Safety of Radioactive Waste Disposal. Contributed papers.",

}

Mallants, D, Volckaert, G & Cool, W 2005, Long-term behaviour of engineered barriers used in surface disposal. 1: Safety functions and treatment of uncertainty. in International Conference on the Safety of Radioactive Waste Disposal. Contributed papers.. Tokyo, Japan, pp. 391-394, International Conference on the Safety of Radioactive Waste Disposal 2005, Tokyo, Japan, 2005-10-03.

TY - GEN

T1 - Long-term behaviour of engineered barriers used in surface disposal. 1: Safety functions and treatment of uncertainty

AU - Mallants, Dirk

AU - Volckaert, Geert

AU - Cool, Wim

N1 - Score = 3

PY - 2005/10

Y1 - 2005/10

N2 - 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.

AB - 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.

KW - LILW disposal

KW - safety assessment methodology

KW - safety functions

KW - engineered barriers

KW - degradation mechanisms

KW - uncertainty analysis

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_26937

UR - http://knowledgecentre.sckcen.be/so2/bibref/2918

M3 - In-proceedings paper

SP - 391

EP - 394

BT - International Conference on the Safety of Radioactive Waste Disposal. Contributed papers.

CY - Tokyo, Japan

T2 - International Conference on the Safety of Radioactive Waste Disposal 2005

Y2 - 3 October 2005 through 7 October 2005

ER -