Browsing by Author "Brisset, P"

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    Applications and impact of radiotracers and nucleonic measurement systems for investigation of sediment transport
    (American Nuclear Society, 2014-08-28) Bandeira, JV; Salim, LH; Brisset, P; Hughes, CE
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    Nuclear techniques for monitoring sediment dynamics in the coastal zone
    (Springer, 2014-01) Bandeira, JV; Salim, LH; Bomtempo, VL; Moreira, RM; Brisset, P; Hughes, CE; Wörman, A
    The knowledge of sediment transport in the coastal region is of vital importance to the management of this critical interface between land and sea, where most of the world population lives. For the assessment of sediment behaviour, hydraulic and sediment measurements, bathymetric survey, mathematical and physical models, are applied. Sediment tracers provide a unique capability for understanding sediment transport assisting in sediment management which cannot be obtained any other way, whether conventional monitoring or physical and numerical models because tracers integrate all the hydrodynamic actions in time and space. Computational fluid dynamics (CFD) is now an essential tool for the management of the natural systems and is increasingly used to study the fate and behaviour of particulates and contaminants. Tracer techniques are often employed to validate hydrodynamic models to enhance confidence in the predictive value of the models. In-situ detection afforded by the use of a radioactive tracer allows accurate quantitative determination of the rate of sediment transport, compared with other tracer methods. Also, it is cost effective and safe: its radiological impact to the environment is minimal. Several case studies, performed in different regions of the world, are presented. 2014, Springer International Switzerland.
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    Radiation protection and regulation for environmental radiotracer studies
    (International Atomic Energy Agency, 2015-01-01) Hughes, CE; Brisset, P
    The use of radioactive tracers in the environment is subject to national regulation as well as International Standards and Guidelines. These address aspects of radiation protection during transport, deployment and in the environment following deployment and are relevant not only to radiation workers and members of the public, but also to non-human biota in the receiving environment. This paper outlines the regulatory framework and safety aspects relating to radiotracing and provides examples of radiation doses modeling for humans and non-human biota. © The authors.
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    Radiotracer applications: case studies from four continents
    (International Atomic Energy Agency, 2015-01-01) Jung, SH; Bandeira, JV; Brisset, P; Wörman, A; Airey, PL; Hughes, CE
    Case studies are a simple way to demonstrate how radiotracers can be successfully used in the environment in addressing water resources contaminant transport and coastal management issues. This paper presents ten case studies from Korea, France, Brazil, Hong Kong, Australia, Belgium and Sweden using a variety of radiotracers including 99mTc, 198Au, 3H, 82Br, 32P, 175+181Hf, 160Tb, 51Cr(III), 65Zn, 54Mn and 35S. These studies address physical transport processes such as dispersion and mixing, reactive transport and adsorption and contaminant uptake. Traced components include water, effluent, nutrients, contaminants and mud in rivers, lakes, wetlands and coastal waters.
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    Radiotracer methodology
    (International Atomic Energy Agency, 2015-01-01) Brisset, P; Airey, PL; Jung, SH; Hughes, CE
    Methods for the use of radiotracers in aquatic environments have been established over the past five decades. The basic principles involve definition of the system or problem to be investigated, selection of a suitable tracer, design of tracer deployment and measurement systems and analysis of the data collected to address the initial problem. These aspects are covered in detail in this paper covering the current state of the art in tracer technology. New developments in the use of nano-particle tracers are also addressed. © The authors.