Steve Bradnam Vytautas Astromskas Zamir Ghani Mark R. Gilbert Malcolm J. Joyce Lee W. Packer
Conventional means of fast neutron detection typically involves moderation and subsequent detection of thermal neutrons via gas filled detectors such as He-3, or alternatively indirect neutron detection via gamma activation systems. Whilst these are often the most conclusive systems for neutron detection, inherent timing and energy information asso…
PreprintLei Tang Kun Yan Biao Cai Yiqiang Wang Bin Liu Saurabh Kabra Moataz M Attallah Yong Liu
Deformation mechanisms of high entropy alloys (HEAs) at cryogenic temperatures have attracted extensive research interest. We used in situ neutron diffraction to study the tensile behavior of a face-centered- cubic HEA at 77 and 15 K and compared its stacking fault energy (SFE) at ambient and cryogenic temperatures. The SFE dropped from 28 mJm −2…
PublishedJack Reid Greg Bailey Edmund Cracknell Mark Gilbert Lee Packer
For either nuclear fusion or generation IV fission reactors to be viable as a commercial energy source the decommissioning and waste disposal solutions must be considered during the design. A multi-step simulation process combining Monte Carlo Neutron Transport simulations with inventory simulations have been performed to estimate the activa…
PreprintRichard Kembleton (on secondment to EUROfusion)
The future of nuclear fusion as a viable energy source has two major hurdles to overcome. Firstly, there are the daunting and complex technology and physics issues to be resolved before a power plant capable of breeding its own fuel and producing an excess of electricity can be built. Secondly, fusion must offer a useful and economically competitiv…
Preprint PublishedQiong Lu1 Chi Zhang Wei Wang Shuai Jiang Lee Aucott Jun Jiang
Stainless-steel 316L is one of the widely used structural materials in the nuclear industry, because of its excellent corrosion resistance and mechanical properties. However, very few researches can be found on its viscoplastic behavior and microstructure evolution at warm and hot deformation conditions, which hinder the possible applicat…
Preprint PublishedMaria Lorena Richiusa Wayne Arter Mehdi Firdaouss Jonathan Gerardin Francesco Maviglia Zsolt Vizvary
The charged particle heat load assessed for the DEMO Single Module Segment First Wall (FW) during current off-normal plasma scenarios underlines that protection is needed for avoiding/reducing damage to the Breeding Blanket FW due to the deposition of a huge amount of energy in a small timescale. Within the “Key Design Integration Issue 1”, an…
Preprint PublishedO. Wong R. Smith C. R. Nobs A. M. Bruce
Neutron spectrum unfolding using activation foils is currently the primary technique planned for measuring the neutron energy spectrum at the first wall of power-generating fusion reactors. Room for improvement in the effectiveness of current foil selection was identified, and a program produced to select foils procedurally in order to maximise the…
Preprint PublishedRuth Sanderson Allan Sanderson Kwame Akowua
The feasibility of a new approach for pipe inspection has been explored using digital twins to enhance guided wave inspection. Guided wave inspection is well-established in the oil and gas industry to screen remotely long lengths of predominately straight pipeline for corrosion. However, inspection of complex geometries of pipe remains a challen…
Preprint PurchaseAlex Valentine Thomas Berry Steven Bradnam James Hagues James Hodson
The accurate and efficient mapping of the radiation environment in a nuclear fusion reactor requires the most advanced radiation transport tools. The Monte Carlo method has long been deployed to deal with the complexity of fusion relevant geometries, with MCNP the adopted industry standard code among the European and wider international community. …
PreprintM.L. Richiusa P. Ireland J. Nicholas Z. Vizvary
The protection strategy adopted for the European DEMOnstration (EU-DEMO) fusion power reactor foresees the use of sacrificial components–referred to as limiters–dealing with plasma-wall contacts. Their aim is to protect the first wall (FW) against the huge amount of plasma energy (up to GigaJoules) released in a few milliseconds during disrupti…
Preprint Published