Vargas, E. ; Ridikas, D. ; Semkova, V. ; Hutanu, V.MLZ* ; Nishizawa, S.

2025
European Nuclear Society Brussels, Belgium
ISBN: 978-92-95064-42-3

Abstract: Neutron transmutation doping of silicon (NTD-Si) is an important method for making high-quality silicon semiconductors [1, 2]. Developed in the 1970s, NTD-Si technology involves exposing silicon ingots to a controlled flux of neutrons in research reactors. The main global producers are quite limited, as only a few high-performance research reactor facilities can provide the required irradiation conditions and offer such service to the supply chain on an industrial scale [3]. Demand for high power electronic components made using NTD-Si has been growing significantly, driven by the expansion of the power grid infrastructure, industrial automation, wind turbine systems, high-speed trains and the automotive industry sectors, among others. These industries rely on efficient, high-performance semiconductor materials, making NTD-Si a critical resource. As a result, ensuring a steady supply of NTD-Si in the future is essential for supporting technologies that reduce carbon emissions, thus helping to achieve net zero targets and combat climate change. NTD-Si also contributes directly to achieving other UN Sustainable Development Goals (SDGs) [4]. Looking ahead, innovations in NTD-Si processes, sustainable operation of already involved research reactors and development of new research reactor projects hold the potential to maintain and stabilize the NTD-Si supply chain. The IAEA, with inputs from international experts and partner organizations, recently has been revisiting the NTD-Si global market. In August 2024, the IAEA hosted a consultancy meeting [5] aiming to assess the need and explore modalities for the establishment of an information exchange forum that would bring together interested parties from the public and private sectors involved in the production and use of NTD-Si at research reactors. The event discussed the current state of this industry, as well as its challenges and future development opportunities, and considered the need to review relevant Agency publications and supporting activities. It also emphasized the need to foster collaboration among stakeholders and address the present and future challenges facing NTD-Si. This paper will provide an overview of the current state of both the NTD-Si production practices and future industrial needs, challenges and future opportunities discussed during the IAEA consultancy meeting and follow up activities. It will also highlight Agency future efforts in support of NTD-Si technology, market analysis considerations and cooperation among relevant stakeholders, including private sector. Need for establishment of an international forum for information exchange, collaborative assessment and cooperative research such as "NTD-Si Alliance 4 Net Zero" will also be outlined.

Keyword(s): Others (1st) ; Others (2nd)

1. IRRAD (IRRAD)

1. No specific instrument