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UKAEA-CCFE-CP(26)442023
The machining challenges commonly experienced in the milling of stainless steels, such as the formation of built-up material on the cutting tool edge and the low thermal conductivity resulting to high heat generation within the cutting zone, require the application of a lubricating cutting fluid. The use of a coolant is essential for dissipating fr…
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UKAEA-CCFE-PR(26)4412023
The pre-thermal quench (pre-TQ) dynamics of a pure deuterium (D2) shattered pellet injection (SPI) into a 3 MA/7MJ JET H-mode plasma is studied via 3D non-linear MHD modelling with the JOREK code. The interpretative modelling captures the overall evolution of the measured density and radiated power. The simulations also identify the importance of t…
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UKAEA-CCFE-PR(26)4402023
We report on a new ground-level neutron monitor design for studying cosmic rays and fluxes of solar energetic particles at the Earth’s surface. The first-of-its-kind instrument, named the NM-2023 after the year it was standardised and following convention, will be installed at a United Kingdom Meteorological Office observatory (expected complet…
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UKAEA-CCFE-PR(26)4392023
Disruption prediction and avoidance is a critical need for next-step tokamaks such as ITER. Disruption Event Characterization and Forecasting (DECAF) research fully automates analysis of tokamak data to determine chains of events that lead to disruptions and to forecast their evolution allowing sufficient time for mitigation or complete avoidance o…
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UKAEA-CCFE-PR(26)4382022
Silicon carbide (SiC) has attractive properties to be used in nuclear reactors and other industries. However, itis hampered by inherent brittleness that is overcome with a fiber-reinforced composite. A finite element modelbased on cohesive zone contact coupled to Coulomb friction is proposed to simulate the pushout responseof isolated fibers in SiC…
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UKAEA-CCFE-PR(26)4372025
Vanadium-based alloys such as V-4Cr-4Ti are of interest as candidates for low activation structural materials for advanced nuclear reactors. One of the major challenges of vanadium-based alloys is their thermal stability and improving their mechanical properties at higher temperature ranges (> 600 °C). This work explores re…
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UKAEA-CCFE-PR(26)4362025
The low density and high temperature at the pedestal in hybrid scenarios on JET provide a unique test of the neo-classical screening in the periphery of the plasma that has previously been observed on JET. Hybrid scenario plasmas have been further developed to aid in the study of temperature gradient screening of high-Z impurities from the core…
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UKAEA-CCFE-PR(26)4352026
This paper presents an operational-space framework for regulating contact forces on geometrically unknown surfaces by integrating online surface-normal estimation with hybrid motion–force control via task-space admittance. Cartesian motion is decomposed into normal and tangential components defined with respect to an estimated local surface frame…
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UKAEA-CCFE-PR(26)4342026
IFMIF-DONES will produce neutrons by irradiating liquid lithium with a 125 mA beam of 40 MeV deuterons. These deuterons will be accelerated by a linear accelerator, which is housed in the accelerator vault within the IFMIF-DONES main building. Neutronics modelling is crucial to determine radiation safety and component lifetimes, with accurate geo…
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UKAEA-CCFE-PR(26)4332026
The 2023 JET deuterium–tritium (D–T) experimental campaign (DTE3) achieved record fusion energy output (69 MJ), providing a unique 14.1 MeV neutron environment for irradiation studies. A range of ITER material samples were exposed in a Long-Term Irradiation Station (LTIS) within the JET nuclear environment to neutron fluxes up to 2 × 10¹³ n/…
Showing 21 - 30 of 2563 UKAEA Paper Results