A study of the potential influence of frame coolant on HCLL-TBM nuclear response

A study of the potential influence of frame coolant distribution on the radiation-induced damage of HCLL-TBM structural material

“…It must be pointed out that, since the neutron spectrum in the HCLL-TBM is mainly fast, the behaviour of the DPA rate is significantly determined by the fast neutrons transport. The radial decreasing profiles of the ratios of the fast components of the neutron flux, shown in [6], justify the behaviour of the DPA rate ratio profiles. Actually, it has to be highlighted that, according to [6], the 6-16 MeV components of the neutron fluxes show a ratio higher than unity, all along the radial direction, even if these components do not give a significant contribution to the DPA rate.…”

“…It is interesting to remark that in the covers DPA rate ratio profiles show a slight growth at their radial far tip which is due, probably, to the enhanced neutron back-scattering on the BP in the second model, in which the fastest component of the neutron flux is higher than in the first model as observed in [6].…”

“…Actually, water amount varies within the supporting frame decreasing in the radial direction from plasma side to back side, therefore the second model of the frame has been set-up in a more realistic semi-heterogeneous way, as described in [6]. In particular, the frame has been subdivided in four radial regions modelled as homogeneous mixtures of AISI 316 stainless steel and water, whose compositions in weight are: 60-40%, 70-30%, 75-25%, 80-20%.…”

“…To this purpose a semi-heterogeneous model has been set-up for the frame taking into account a more realistic water distribution. The results of such a study have been reported in [6], while the investigation of the potential influence of the frame composition on the 0920-3796/$ -see front matter © 2008 Elsevier B.V. All rights reserved. doi:10.1016/j.fusengdes.2008.08.022 radiation-induced damage of the HCLL-TBM structural material is the subject of this paper.…”

Assessment of the Thermo-mechanical Performances of a DEMO Water-Cooled Liquid Metal Blanket Module

“…Within this framework, a research campaign has been launched in close cooperation with CEA-Saclay and ENEA-Brasimone by the Department of Energy, Information Engineering and Mathematical Models (DEIM) of the University of Palermo, that has been, long time now, involved in the theoretical investigation of liquid metal blankets neutronic, magneto-hydro-dynamic and thermomechanical issues [6][7][8][9][10][11][12][13][14]. In particular, the research activity has aimed at assessing the thermo-mechanical performances of the outboard equatorial module of the DEMO1-WCLL blanket, under both normal operation and over-pressurization steady state scenarios.…”