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Fusion and advanced fission power plants require advanced nuclear materialsto function under new, extreme environments. Understanding the evolution ofmechanical and functional properties during radiation damage is essential tothe design and commercial deployment of these systems. The shortcomings ofexisting methods could be addressed by a new technique - intermediate energyproton irradiation (IEPI) - using beams of 10 - 30 MeV protons to rapidly anduniformly damage bulk material specimens before direct testing of engineeringproperties. IEPI is shown to achieve high fidelity to fusion and fissionenvironments in both primary damage production and transmutation, oftensuperior to nuclear reactor or typical (low-range) ion irradiation. Modelingdemonstrates that high doserates (0.1 - 1 DPA/per day) can be achieved in bulkmaterial specimens (100 - 300 {\mu}m) with low temperature gradients andinduced radioactivity. The capabilities of IEPI are demonstrated through a 12MeV proton irradiation and tensile test of 250 {\mu}m thick tensile specimensof a nickel alloy (Alloy 718), reproducing neutron-induced data. These resultsdemonstrate that IEPI enables high throughput assessment of materials underreactor-relevant conditions, positioning IEPI to accelerate the pace ofengineering-scale radiation damage testing and allow for quicker and moreeffective design of nuclear energy systems.

Intermediate energy proton irradiation: rapid, high-fidelity materials testing for fusion and fission energy systems