Neutronic assessment of the IFMIF-DONES HFTM specimen stack distribution Álvarez Castro, Irene Anguiano Millán, Marta Mota, Fernando Hernández, Rebeca Qiu, Yuefeng IFMIF-DONES HFTM Neutronics DPA Comparative This work has been supported by the European Union's FEDER program, IFMIF-DONES Junta de Andalucia's program at the Universidad de Granada SE21, by MCIN/AEI/10.13039/501100011033/FEDER, UE (PID2022-137543NB-I00) and has been carried out within the framework of the EUROfusion Consortium, funded by the European Union via the Euratom Research and Training Programme (Grant Agreement No 101052200 — EUROfusion). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Commission. Neither the European Union nor the European Commission can be held responsible for them. IFMIF-DONES (International Fusion Materials Irradiation Facility- DEMO Oriented NEutron Source) is a neutron irradiation facility designed to collect data on material irradiation for the construction of demonstration fusion power plants. This study focuses in investigate the effect of a realistic model of specimens being irradiated in HFTM in IFMIF-DONES, and its comparison with previous results with the homogeneous model. Neutron fluence rate, damage dose rates, and gas production have been calculated for the standard 20 × 5 cm² profile and a 10 × 5 cm² beam size. These calculations were performed for a deuteron beam with an energy of 40 MeV and a current of 125 mA. More realistic neutronics model gives very consistent DPA volumes with the previous. The main difference is a neutron slight streaming in the detailed one. The distribution of DPA shows irregular patterns depending on specimen location. This research highlights the significant role played by specimen distribution in enhancing the accuracy and reliability of dpa measurements within the IFMIF-DONES facility and the influence of the beam size. 2024-02-16T11:17:19Z 2024-02-16T11:17:19Z 2024-03 journal article I. Álvarez, M. Anguiano, F. Mota, R. Hernández, Y. Qiu, Neutronic assessment of the IFMIF-DONES HFTM specimen stack distribution, Fusion Engineering and Design, Volume 200, 2024, 114212. https://doi.org/10.1016/j.fusengdes.2024.114212 https://hdl.handle.net/10481/89249 10.1016/j.fusengdes.2024.114212 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier