UKAEA Papers

"Towards reliable design-by-analysis for divertor plasma facing components – guidelines for inelastic assessment (part II: irradiated)"

• Mike 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…

"Vibrational resolved electron impact electronic excitation of BeH"

• D Darby-Lewis
• J Tennyson
• S N Yurchenko
• K D Lawson

Beryllium is being adopted for plasma facing walls in fusion reactors. This has led to the observation of emissions from the A 2Π state of beryllium hydride. Use of these emissions to monitor Be erosion requires electron impact excitation rates. Cross sections for electron-impact vibrational excitation within the X 2Σ + state and vibrationally…

"Microstructure-informed, predictive crystal plasticity finite element model of fatigue-dwells"

• Dylan 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…

"Nuclear Safety Issues for Fusion Power Plants"

• M. Lukacs
• L.G. Williams

Developing a robust safety case is a key step in the development of a fusion power reactor for electricity generation. Plans for fusion power reactors are already underway and before nuclear facilities are licensed, they must demonstrate they satisfy several safety objectives involving keeping workers and the public safe and limiting any environ…

"Particle and heat spreading in the tokamak divertor via turbulent mixing"

• Samuel 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 …

"What are the challenges during plasma measurements and controls within Nuclear Fusion experiment machines?"

• Navdeep Mehay

Fusion Power is generated by harnessing the energy released by replicating the fusion processes that happen within stars e.g. The Sun. The Sun uses hydrogen as a fuel and the core temperature of our Sun is estimated to be 15million°C, however the fusion rate for hydrogen is very slow, in order to generate power by the fusion within a machine on…

"Inference of divertor plasma characteristics using Bayesian multi-diagnostic analysis"

• C. Bowman
• J. R. Harrison
• B. Lipschultz
• S. Orchard
• K. J. Gibson
• M. Carr
• K. Verhaegh
• O. Myatra

Advancing our understanding of divertor plasma physics is limited by an inability to directly determine the plasma characteristics (density, temperature, etc) over the entire divertor cross-section. At best, diagnostics are able to measure ne and Te at isolated points. More commonly however, diagnostics only measure higher-level quantities (e.g. em…

"The storage and transfer of energy"

• R Carruthers

"A bundle divertor for a fusion reactor"

• AD Sanderson
• PE Stott

"The bundle divertor - Part 2 Plasma Properties"

• PE Stott
• CM Wilson
• A Gibson