C Harrington A Baron-Wiechec R Burrows R Holmes R Clark S Walters T Martin R Springell J Öijerholm R Becker
The European DEMO design will potentially use single phase water cooling in various components that require protection against corrosion damage. Coolant conditions will be similar to fission PWRs but with additional considerations arising from the materials of choice (Eurofer, CuCrZr), 14 MeV neutron irradiation, the presence of tritium, and strong…
Preprint PublishedStuart I. Muldrew Felix Warmer Jorrit Lion Hanni Lux
With a lack of plasma disruptions and current-driven instabilities, stellarators are potentially an attractive option for a fusion power plant. Previous system studies have been performed to optimise a HELIAS (HELIcal-axis Advanced Stellarator) 5-B power plant using PROCESS, however these have been based around a single design point. In reality …
Preprint PublishedYiqiang Wang Omar Mohamed Keren Dunn Tan Sui Mutaz Bashir Peter Copper Adomas Lukenskas Guiyi Wu Michael Gorley
Precipitation hardened Copper-Chromium-Zirconium (CuCrZr) alloy is a prime candidate for divertor components in future European DEMOnstration fusion reactors. To develop the DEMO Design Criteria for In-vessel Components (DDC-IC), the failure criterion of CuCrZr needs to be investigated. Hence, the effects of stress triaxiality and loading…
Preprint PublishedAlexander J. Leide Richard. Todd David E. J. Armstrong
Focussed ion beam (FIB) milling can be used to reveal sub-surface fracture and deformation below indents in materials. However, evolution of residual stresses around the indent impression cause changes to the crack morphology during the FIB cross-sectioning procedure. Berkovich nanoindents in single crystal hexagonal (6H) silicon carbide cause r…
PreprintAllan HarteHuw DawsonDavid BowdenSimon KirkMike Gorley
The suitability of post-weld heat treatments are often measured in terms of reducing residual stress and/or ensuring hardness homogeneity. Here we use detailed digital image correlation to quantify the localised deformation behaviour of laser welded Eurofer-97 both with and without a normalising and tempering treatment. This is coupled with detaile…
Preprint PublishedH. Wilcox B. Lewis P. Styman
Small and shear punch testing are promising techniques that can be applied as virtually non-destructive tools to monitor in-service components and maximise the amount of information that can be obtained from limited in situ material; several mechanical properties can be determined at critical locations of a component with no need for repair welds. …
Preprint PublishedV.D. Vijayanand M. Mokhtarishirazabad J. Peng Y. Wang M. Gorley D.M. Knowles M. Mostafavi
Determining tensile properties from small punch test is being pursued actively in the nuclear industry due to the limited volume of material such tests use compared with standard tests which can be critical when considering active or development samples. One of the crucial challenges in harnessing the full potential of this technique is formulat…
Preprint PublishedMike Fursdon Jeong-Ha You
This paper gives guidelines for assessing the structural integrity of plasma facing components (PFC)when irradiated to the levels expected in DEMO after two full power years. The paper is part 2 of a 3-part paper describing the EuroFusion DEMO Divertor group (WPDIV) Inelastic Analysis procedure (IAP), created to improve the assessment of PFCs, a…
Preprint PublishedDylan Agius Abdullah Al Mamun Chris A Simpson Christopher Truman Yiqiang Wang Mahmoud Mostafavi David Knowles
Crystal plasticity finite element (CPFE) modelling is an effective tool from which detailed information on the meso-scale behaviour of crystalline metallic systems can be extracted and used, not only to enhance the understanding of material behaviour under different loading conditions, but also to improve the structural integrity assessment of e…
Preprint PublishedSamuel Rogers David Bowden Rahul Unnikrishnan Fabio Scenini Michael Preuss David Stewart Daniele Dini David Dye
The galling behaviour of 316L stainless steel was investigated in both the unoxidised and oxidised states, after exposure in simulated PWR water for 850 hours. Galling testing was performed according to ASTM G196 in ambient conditions. 316L was found to gall by the wedge growth and flow mechanism in both conditions. This resulted in folds ahead of …
Preprint Published