L. W. Packer P. Batistoni S. Bradnam B. C. Colling S. Conroy Z. Ghania M. R. Gilbert S. Jednorog E. Laszyńska D. Leichtle I. Lengar J.W.Mietelski R. Misiak C.R.Nobs M. Pillon S. Popovichev V. Radulović I.E. Stamatelatos T. Vasilopoulou A. Wójcik-Gargula JET Contributors
This paper details progress in experimental characterisation work at JET for the long-term irradiation station conducted as part of a project to perform activation experiments using ITER materials. The aim is to take advantage of the significant 14 MeV neutron yield expected during JET operations to irradiate samples of materials that will be used …
Preprint PublishedM.R. Gilbert T. Eade C. Bachmann U. Fischer N.P. Taylor
Inventory calculations have a key role to play in designing future fusion power plants because, for a given irradiation field and material, they can predict the time evolution in chemical composition, activation, decay heat, gamma-dose, gas production, and even damage (dpa) dose. For conceptual designs of the European DEMO fusion reactor such calcu…
Preprint PublishedM.R. Gilbert J.-Ch. Sublet S.L. Dudarev
Accurately quantifying the transmutation rate of tungsten (W) under neutron irradiation is a necessary requirement in the assessment of its performance as an armour material in a fusion power plant. The usual approach of calculating average responses, assuming large, homogenised material volumes, is insu?cient to capture the full complexity of the …
Preprint PublishedM.R. Gilbert J.-Ch. Sublet
The neutrons generated in fusion plasmas interact with materials via nuclear reactions. The resulting transmutations and atomic displacements have life-limiting consequences for fusion reactor components. A detailed understanding of the production, evolution and material consequences of the damage created by cascades of atomic displacements require…
Preprint PublishedJ-Ch. Sublet M. Fleming M. Gilbert
The inventory code Fispact-II, when connected to the nuclear data libraries TENDL-2015, ENDF/B-VII.1, JENDL-4.0u or JEFF-3.2, forms a simulation platform for modelling activation, transmutation processes and simulating radiation damage sources terms. The system has extended nuclear data forms, uncertainty quantification and propagation models which…
PreprintJ-Ch. Sublet J. W. Eastwood J. G. Morgan M. R. Gilbert M. Fleming W. Arter
Fispact-II is a code system and library database for modelling activation-transmutation processes depletion-burn-up, time dependent inventory and radiation damage source terms caused by nuclear reactions and decays. The Fispact-II code, written in object-style Fortran, follows the evolution of material irradiated by neutrons, alphas, gammas, proto…
Preprint PurchaseM.R. Gilbert J. Marian J.-Ch. Sublet
Materials subjected to neutron irradiation will suffer from a build-up of damage caused by the displacement cascades initiated by nuclear reactions. Previously, the main “measure” of this damage accumulation has been through the displacements per atom (dpa) index, which has known limitations. This paper describes a rigorous methodology to calcu…
Preprint PublishedL. W. G. Morgan J. Shimwell M. R. Gilbert
A large number of materials exist which have been labeled as low activation structural materials (LAM). Most often, these materials have been designed in order to substitute-out or completely remove elements that become activated and contribute signi cantly to shut-down activity after being irradiated by neutrons in a reactor environment. To date, …
Preprint PublishedM. R. Gilbert Z. Ghani J. E. McMillan L. W. Packer
Efficient and reliable detection of radiological or nuclear threats is a crucial part of national and international efforts to prevent terrorist activities. Radiation Portal Monitors (RPMs), which are deployed worldwide, are intended to interdict smuggled fissile material by detecting emissions of neutrons and gamma rays. However, considering the r…
Preprint PurchaseM. R. Gilbert S. Zheng R. Kemp L. W. Packer S. L. Dudarev J.-Ch. Sublet
A key goal for fusion materials modelling research is the development of predictive simulation models and capabilities to assess material performance under the neutron irradiation conditions expected in near-plasma regions of fusion reactor tokamaks. This paper presents computational results from the modelling of neutron fields in the latest concep…
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