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IJSTR >> Volume 10 - Issue 2, February 2021 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Transport And Fate Of Radionuclides From A Hypothetical Repository Of Radioactive Waste In The Accra Plains

[Full Text]

 

AUTHOR(S)

Paul Essel, Dominic Otoo, Mark Amo-Boateng, Thomas Tetteh Akiti

 

KEYWORDS

Schist; AMBER; Fracture; Radioactive Contaminant; Accra Plains; Groundwater

 

ABSTRACT

Ghana has a stockpile of disused radioactive sources that need to be managed and dispose of. The Accra Plains is a probable site to host such a repository in Ghana. To evaluate the long-term safety of the proposed repository, a model of the geosphere and disposal system of a hypothetical radioactive waste repository sited in the Accra Plains, was developed using the AMBER simulation tool. After the engineered barriers of the repository deteriorate, undecayed radionuclides escape through groundwater and migrate through the geosphere. The model functions to monitor the escaping radionuclides, to mitigate its effects on humans and the environment. The model also purposes as a tool for calculation of the annual effective dose on a receptor dwelling around an abstraction borehole located at 4km, 1km and 200m down the hydraulic gradient of the hypothetical repository. Predicted results were used to assess the suitability of the site to host such a repository. Radiation exposure to the receptor is assumed to occur from abstraction and use of groundwater from the geosphere via the abstraction borehole. The groundwater is used for domestic purposes, that is drinking, and agricultural purposes, viz., watering animals and irrigation of crops. The predicted results for liquid releases in terms of the calculated peak annual effective dose in all cases were significantly lower than the International Commission on Radiological Protection (ICRP) dose constraint of 0.3mSv/y. The results thus indicate that the Accra Plains is capable to safely host a radioactive waste disposal facility for Ghana’s disused radioactive sources.

 

REFERENCES

[1]. Agbevanu K. T., (2015). Modelling and Simulation of Groundwater Flow and Radionuclide Transport in Aquifers of Dahomeyan System of the Accra Plains in Ghana. MSc Thesis, University of Ghana.
[2]. Aidoo, F. (2013). Drilling Report submitted to the Radioactive Waste Management Center of the Radiation Protection Institute
[3]. Atobrah, K. (1983). Groundwater flow in the crystalline rocks of the Accra Plains of Ghana, West Africa.
[4]. Bosompemaa P. (2015). Hydrogeological Assessment of Groundwater on Legon Campus: Application of Geophysical and Numerical Techniques. MSc Thesis, University of Ghana.
[5]. Darko, P.K., Barnes, E.A. and Sekpey, N.K. (1995). Groundwater assessment report on the Accra Plains. Unpublished Technical Report, Water Resources Research Institute (CSIR) Accra
[6]. Enviros and Quintessa Ltd (2017). AMBER version 6.2
[7]. Essel Paul, Amo-Boateng Mark, Otoo Dominic, Akiti Thomas Tetteh (2020). Assessment of Migration of Radionuclides from a Hypothetical Radioactive Waste Repository Sited in the Schist Rock of the Accra Plains
[8]. Flamíková D. and Necas V. (2020). Assessment of the impact of selected changes in the deep geological repository model on its long-term safety; EPJ Web of Conferences 225, 06012
[9]. Foppena Jan Willem, George Lutterodtb, Gabriel C. Rauc,d, Obed Minkah (2020). Groundwater flow system analysis in the regolith of Dodowa on the Accra Plains, Ghana
[10]. Glover, E.T. (2013). Hydrogeochemical characterization of the rocks of the Accra plains for a radioactive waste repository, PhD Thesis, University of Ghana.
[11]. Hedin, A. (2002). Integrated Analytic Radionuclide Transport Model for a Spent Nuclear Fuel Repository in Saturated Fractured Rock, Nuclear Technology, 138:2, 179-205
[12]. IAEA (1999). Hydrogeological investigation of sites for the geological disposal of radioactive waste; Technical reports series no. 391
[13]. IAEA (2016). Generic Post-Closure Safety Assessment for Borehole Disposal of Disused Sealed Sources.
[14]. JUSSILA Petri (2000). Geosphere transport of radionuclides in safety assessment of spent fuel disposal; STUK-YTO TR 164, Helsinki
[15]. Lewis M. A., Cheney C. S. and ÓDochartaigh B. É, (2006). Guide to Permeability Indices. Open Report CR/06/160N.
[16]. Lewis M A. (1989). ‘Water’ in Earth Science Mapping for planning, development and conservation.
[17]. NECSA (2003). South African Nuclear Energy Corporation, Design for the Borehole Disposal Concept, Report GEA 1623, Pretoria.
[18]. Open University Course S278: Earth’s physical resources: origin, use and environmental impact.
[19]. Sandia Report (July 1991). Dual Porosity Models for Solute Transport at Yucca Mountain,
[20]. Yu C., C. Loureiro, J.-J. Cheng, L.G. Jones, Y.Y. Wang, Y.P. Chia, and E. Faillace (2015); Data Collection Handbook to Support Modelling Impacts of Radioactive Material in Soil and Building Structures, ANL/EVS/TM-14/4