A Reliability Engineering Study For A
Near Surface Radioactive Waste Repository
Using Genetic Algorithm
Author(s)
L. A. Aguiar & V. C. Damaso
Abstract
Infiltration of water into a waste disposal facility and into the waste region is the
main factor inducing the release of radionuclides from a disposal facility. Since
infiltrating water flow is dependent on the natural percolation at the site and the
performance of engineered barriers, its prediction requires modelling of
unsaturated water flow through intact or partially/completely failed components
of engineered barriers. These include the cover systems, concrete vault, backfill,
waste forms, and overpacks. This paper aims to carry out a performance study
regarding a near surface repository in terms of reliability engineering. It is
assumed that surface water infiltrates through the barriers reaching the matrix
where radionuclides are contained, thus releasing them into the environment.
The repository consists of a set of barriers which are considered saturated porous
medium, except geosphere. A genetic algorithm is employed to establish an
optimized configuration to the structure of the repository, by determining the
thicknesses of barriers and waste packages arrangement, taking into account the
engineering and radiological constraints. Such restrictions aim to keep the risks
associated with the migration of radionuclides at a low level.
Keywords: radioactive waste repository, reliability engineering, optimization.
1 Introduction
Radioactive waste is an inherent result of nuclear energy generation and the use
of radioactive material in industry, science, and medicine. Low and intermediate
Keywords
radioactive waste repository, reliability engineering, optimization
Related Book
Other papers in this volume
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