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UKAEA-CCFE-PR(26)4172025
Two ferritic Oxide Dispersion Strengthened (ODS) steels Fe-12Cr-YWT and Fe-14Cr-YWT were irradiated in the High Flux Reactor (HFR) up to 3 dpa at a nominal temperature of 600°C. Tensile tests at room and elevated temperatures as well as microstructural investigations using transmission electron microscopy (TEM) and atom probe tomography (APT) were…
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UKAEA-CCFE-CP(26)362025
Predicting with high accuracy (low uncertainty) the performance of tritium breeding systems is a must for design engineering of future fusion devices. Current modelling relies on scant experimental data and is known to have uncertainties that if realised in a real system would p…
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UKAEA-CCFE-PR(26)4162025
We propose a computational scheme for the diffusion and retention of multiple hydrogen isotopes with multi-occupancy traps parameterized by first principles calculations. We show that it is often acceptable to reduce the complexity of the coupled differential equations for gas evolution by taking the dynamic steady state, a generalisation of the Or…
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UKAEA-CCFE-CP(26)352025
Diagnostics are critical on the path to commercial fusion machines, since the ability to understand and measure plasma features is important to sustaining fusion reactions. Gamma spectroscopy is a technique in experimental nuclear physics that can be used to aid fusion diagnostics, including providing information in neutron activation analyses to c…
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UKAEA-CCFE-PR(26)4152025
An understanding of the occurrence of opacity is important for modelling the power exhaust of magnetic confinement fusion plasmas. The absorption and reemission of radiation alters the magnitude and distribution of radiation within the divertor of the fusion machines, the plasma volume wi…
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UKAEA-CCFE-PR(26)4142025
One of the main objectives of the ITER experiment is to demonstrate stable operation with a scientific fusion Q ~ 10 for up to 500 s. The ITER 5.3T/15MA DT-plasma scenario is designed for this purpose. Operation of the full pulse consists of several non-trivial steps. The paper considers specifically the challenges of ramp-up and flat-top operation…
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UKAEA-CCFE-PR(26)4132025
The Grad–Shafranov (GS) equation is a nonlinear elliptic partial differential equation that governs the ideal magnetohydrodynamic equilibrium of a tokamak plasma. Previous studies have demonstrated the existence of multiple solutions to the GS equation when solved in idealistic geometries with simplified plasma current density profiles and bounda…
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UKAEA-CCFE-PR(26)4122024
The SUSD3D computer code has been recently updated with new features including the extension of the nuclear data sensitivity and uncertainty (S/U) analysis to gammaray quantities such as gamma flux and heating. Gamma relevant nuclear data can be processed allowing S/U for coupled neutron/gamma problems. The code is available from the NEA data B…
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UKAEA-CCFE-PR(26)4112024
EUROFER97 specimens Al-base coated using different processes, either chemical vapour deposition or electroplating, were oxidised at 980 °C for 60 minutes and 760 °C for 90 minutes to understand whether this 2-step oxidation process could provide a suitable oxide layer able to offer both corrosion protection and a tritium permeation barrier. The…
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UKAEA-CCFE-CP(26)342024
The MAST-U spherical tokamak (ST) is equipped with on-axis and off-axis neutral beam injectors (NBI), external sources of super-Alfvénic fast ions that provide opportunities for studying a wide range of phenomena relevant to the physics of alpha-particles in future burning plasma devices such as STEP or ITER. High performance of MAST-U plasmas rel…
Showing 21 - 30 of 2526 UKAEA Paper Results