As countries move toward new nuclear reactor technologies, develop new fuel designs and look to extend the operating life of existing nuclear power plants, the IAEA is launching a four-year coordinated research project (CRP) focused on improving nuclear fuels and materials testing in research reactors. The initiative is designed to optimize the way irradiation experiments are planned and conducted, bringing together experts from research reactor facilities and stakeholders involved in fuels and materials testing worldwide.
Before new nuclear fuels or structural materials can be introduced into nuclear reactors, they need to undergo qualification and testing under demanding nuclear conditions. Research reactors offer a dedicated setting where scientists and engineers can expose materials to radiation, high temperatures and other extreme conditions to evaluate their performance over time. The need for irradiation testing is expanding as countries show greater interest in advanced nuclear systems, small modular reactors (SMRs), fusion technologies, the long-term operation of existing nuclear power plants and high-performance fuels for research reactors.
Under the new project, the IAEA will seek to improve the design of experiments so that every test delivers greater value. The project will examine how irradiation experiments are designed and carried out, with the objective of strengthening nuclear fuels and materials testing capabilities across research reactor facilities.
Improving Experiment Design and Testing Conditions
Research reactors have played a role in fuels and materials testing for decades, with more than 60 operational facilities worldwide currently contributing to these activities. However, the testing requirements associated with modern fuel and material concepts are becoming more complex. Experiments can require carefully controlled conditions involving specific temperature, pressure, chemistry, neutron fluxes and spectra.
Developing devices capable of reproducing those conditions can be both challenging and resource intensive, particularly when the number of available irradiation positions is limited. The new CRP will therefore assess existing practices and identify ways to make experiment design more systematic, improving both the quality and comparability of results between facilities. Its work will cover irradiation devices including capsules, rigs and loops, alongside technologies used to monitor and control conditions during irradiation.
Researchers will also examine instrumentation developments that allow measurements to be taken during irradiation instead of waiting until testing has been completed.
“Research reactors have a distinctive role in supporting the safe deployment of new fuels and materials for nuclear energy production. They also support the supply of medical radioisotopes,” said Petr Chakrov, Head of the IAEA’s Research Reactor Section.
“By improving the way experiments are designed, we can help countries make the best use of existing testing capabilities, plan new ones and foster innovation across the nuclear sector,” he added.
Technical Guidance for Future Nuclear Research
The four-year project is expected to deliver recommendations, technical guidance and practical tools aimed at helping countries develop safer, more effective and more efficient experiments. Its results are intended to support the deployment of new reactor and fuel technologies, the long-term operation of existing nuclear power plants and the strengthening of research reactor capabilities worldwide.
Research Objectives of the Project
The research objectives of the project are:
- Enhance methodologies for innovative experimental design aimed at testing nuclear fuels and materials in research reactors worldwide.
- Evaluate current requirements, methods and techniques used for irradiation testing of nuclear fuels and materials in research reactors, while identifying areas for further enhancement.
- Upgrade existing and/or establish new methods and techniques for the irradiation testing of fuels and materials, including innovative irradiation device designs such as capsules, rigs and loops.
- Enhance existing and/or establish new approaches for controlling and monitoring irradiation conditions, as well as conducting in-situ measurements.
- Prepare technical guidance to facilitate the design of experiments for testing fuels and materials in research reactors.
Through these activities, the IAEA aims to strengthen nuclear fuels and materials testing and help research reactor facilities make more effective use of their existing capabilities.
