Prince Rautiyal
<prince.rautiyal@student.shu.ac.uk>

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 seocnd-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”.


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A study of irradiation effects in high level radioactive waste glasses

Prince Rautiyal*1, Hywel Jones1 and Paul Bingham1,
1 Materials and Engineering Research Institute, Sheffield Hallam University,
Sheffield S1 1WB, UK
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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) [1]. This work aims to study radiation effects in simple and complex (simulated waste loaded) glasses. 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, will be reported. Similar glass named as the international simple glass (ISG), developed as a reference benchmark for chemical durability studies by six collaborating nations, will also be discussed. This paper presents methodologies, recent results obtained from gamma irradiation on UK-MW, Indian, ISG and SON68 glasses and future work. Ultimately, a clearer understanding of different radiation defects and development of radiation-damage resistant glasses, by utilising the “self-healing” enabled by key dopants, is anticipated [2].

Keywords:
High level nuclear waste; Radiation-induced defects, Borosilicate glasses; Self-healing;

References:
[1] R. Ewing, W. Weber and F. Clinard, “Radiation effects in nuclear waste forms for high-level radioactive waste”, Progress in Nuclear Energy, vol. 29, no. 2, pp. 63-127, 1995.

[2] M. Mohapatra, R. Kadam, R. Mishra, C. Kaushik, B. Tomar and S. Godbole, “Gamma Radiation-Induced Changes in Trombay Nuclear Waste Glass Containing Iron”, International Journal of Applied Glass Science, vol. 4, no. 1, pp. 53-60, 2012.