Speaker
Description
Authors (affiliation): Callum L. Grove (UKAEA, UK), Chantal R. Nobs (UKAEA, UK), Lee W. Packer (UKAEA, UK), Nicola Fonnesu (ENEA, Italy), Ewa Łaszyńska (IPPLM, Poland), Jerzy W. Mietelski (IFJ, Poland), Mario Pillon (ENEA, Italy), Marilia I. Savva (NCSRD, Greece), Ion E. Stamatelatos (NCSRD, Greece), Anthony Turner (UKAEA, UK), Theodora Vasilopoulou (NCSRD, Greece), Rosaria Villari (ENEA, Italy), Andrej Zohar (JSI, Slovenia) and JET contributors.
As part of the EUROfusion Preparations for ITER Operations (PrIO) programme, with the 'ACT' sub-project, 11 real materials used in the main components of the International Thermonuclear Experimental Reactor (ITER) tokamak and 4 different dosimetry foil materials have been irradiated within the Joint European Torus (JET) tokamak neutron environment during the operations with deuterium and tritium undertaken in 2021 (DTE2 campaign). A total of 68 ITER material foils and 13 dosimetry foils were placed in a long-term irradiation station (LTIS) assembly close to the JET vacuum vessel. These irradiated foils were extracted and distributed to several labs across Europe for gamma spectroscopy measurements. The goal of this analysis was to identify and accurately assess the activity of nuclides present. This work presents the latest gamma spectrometry results of the foils measured by the RADLab, UKAEA.
The dosimetry foils materials include Titanium, Cobalt, Iron, and Yttrium. The selection of these foil materials was based on known dosimetry reactions present in nuclear data to characterise the irradiation received at the location of the LTIS. The irradiated ITER foils consist of materials used in the ITER fusion device currently under construction, which include: stainless steels from the in-wall shield, vacuum vessel and toroidal field plates, EUROFER 97-3 steel, Alloy 660, CuCrZr, Al-Bronze, XM-19, Tungsten, and Inconel 718. The data obtained from these irradiated ITER materials provide insight into the neutron-induced radionuclides that ITER will generate in the nuclear phase. The activity measurement results from UKAEA are presented and compared with initial simulated predictions from neutron transport and nuclear inventory calculations.
