PhD in Behaviour of Concrete Structures as Lining for Geological Disposal Facility of Radioactive Waste Belgian Nuclear Research Centre in Belgium

This funded PhD position at the Belgian Nuclear Research Centre (SCK CEN) offers a unique opportunity to investigate the behaviour of concrete structures used as lining in geological disposal facilities for radioactive waste. The research is situated within the context of Belgium's deep geological repository (DGR) program, focusing on disposal galleries constructed in poorly indurated clays, specifically Boom Clay, at a depth of 400 meters. The project is closely linked to the HADES Underground Research Laboratory, where advanced tunneling technologies and long-term monitoring of concrete linings have been implemented.

The primary aim of the PhD is to develop and enhance theoretical and numerical models to better understand the evolution of concrete under complex environmental conditions, including overburden pressure, humidity gradients, and interactions with surrounding clay. The research will involve the development of a new model for creep and shrinkage in blended cementitious concrete, integrating hydro-chemical-mechanical processes. Extensive verification and validation will be performed using experimental data from previous studies and literature, supplemented by minimal new experiments as needed.

Structural scale simulations will be conducted to assess the mechanical stability and long-term performance of the connecting gallery lining, utilizing strain data collected over 22 years. This analysis will enable back-calculation of external pressures and inform the optimization of future repository designs. The project is multidisciplinary, combining civil engineering, mechanical engineering, geology, and materials science, and benefits from SCK CEN's international research environment and innovative facilities.

Applicants should hold a Master of Science in engineering, with expertise in mechanical engineering, computational mechanics, civil engineering (mechanics focus), or computational geomechanics. Excellent English language skills are required. The position is fully funded for four years, with access to SCK CEN's training programs and collaborative research opportunities. The application deadline is March 31, 2026, and the expected start date is October 1, 2026.

For further details and to apply, visit the SCK CEN website or contact [email protected]. This position is ideal for candidates interested in advancing the understanding of concrete behaviour in challenging underground environments and contributing to the safe management of radioactive waste.