University of York demonstrates breakthrough in radionuclide detection

As part of the “Novel Separation and Direct Measurement Technologies for Radionuclides” challenge set by the Analytical Services department at Sellafield Ltd, the University of York is developing a cutting-edge detection system aimed at revolutionising how radioactive samples are analysed. The research team hosted a pivotal mid-project demonstration at the School of Physics, Engineering and Technology, University of York, offering challenge owners and stakeholders a closer look at their progress. 

The project, led by Dr Christian Diget, seeks to overcome the limitations in the nuclear sector of in-liquid identification of alpha-emitting isotopes – a critical need in nuclear energy and decommissioning. In comparison, traditional approaches require preparation and processing of samples, which can be inefficient and time consuming. 

During the demonstration, a group of 11 attendees – including representatives from Sellafield Ltd, Game Changers delivery partner FIS360, and members of the university’s research group – gathered to observe a live test of the device using a radioactive source. The event offered a unique opportunity to see the hardware in action, explore the detection principles, and have in-depth technical discussions around specific use cases at Sellafield.

Christian Diget, Academic, University of York said: “Traditional alpha radiation detection is slow and complex. Through Game Changers, we're developing in-situ technology that simplifies the process and expands its use across Sellafield and beyond - bringing real-world impact to a long-standing challenge.” 

Alongside Dr Diget, key contributors from the University of York include Dr Jamie Brown, Dr Samadhan Patil, and PDRA Alex Marchant. Their collective work has focused on refining sensor selection, device fabrication techniques, packaging design, and testing the chemical durability of the sensor components. 

This demonstration marked the halfway point of the team’s 12-month proof-of-concept (PoC) project, which began after the successful completion of a feasibility study in 2024. In parallel, the devices are undergoing bench and in-laboratory testing at multiple sites internationally. These collaborations are already helping to validate performance under varied operational conditions and are a critical step toward potential deployment. 

With the promise of improving how radioactive liquids are analysed, especially in high-precision environments such as Sellafield, this technology could play a key role in the future of nuclear measurement, safety, and decommissioning.