Prince Rautiyal earned his bachelor’s degree in physics from University of Delhi, India followed by master’s in nuclear science from University of Delhi, India. He is currently a third-year PhD student in material and engineering research institute, Sheffield Hallam University, Sheffield, United Kingdom. His PhD subject is to “Understand the structure properties and performance of glasses for radioactive waste immobilisation using advanced spectroscopic techniques”.
Prince Rautiyal a *, Ruth Edge b, Laura Leay b, Aaron Daubney b, Alan H. Jones a, and Paul A. Bingham a, aMaterials and Engineering Research Institute, Sheffield Hallam University, Sheffield S1 1WB, UK b University of Manchester, Dalton Cumbrian Facility, Westlakes Science and Technology Park, Moor Row, Cumbria CA24 3H, UKb* The School of Mechanical, Aerospace and Civil Engineering, University of Manchester, Oxford Road, M19 9PL,UKa*
Performance assessment of high-level radioactive waste (HLW) glasses against radiation damage is of crucial importance to ensure safe and economic disposal over geological disposal periods (tens of thousands to a million years) . This work aims to study radiation effects in simple glasses using EPR and UV-Vis spectroscopies. Radiation-induced defects in three international glasses, namely UK MW lithium-sodium borosilicate; Indian sodium-barium borosilicate; and French SON68 borosilicate, which are being used as immobilisation glass matrices for HLW by the UK, India and France respectively, are reported. Radiation effects in a similar reference borosilicate glass, the international simple glass (ISG), have also been discussed. This paper presents methodologies, recent results obtained by gamma and alpha irradiation on the four glasses. Results from EPR analyses showed the formation of different defect centres in different glasses which are supported by the UV-Vis results . Finally, a stability study of the defects with temperature and time has been established.
Keywords: High level nuclear waste; radiation-induced defects, EPR
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