20.500.12556/DiRROS-25125 Validating a simplified water-activation transport model using time-resolved reactor-pulse neutron measurements at KATANA KATANA is a water activation facility at the Jožef Stefan Institute TRIGA Mark II reactor in Ljubljana, Slovenia, developed to study water activation processes relevant for future fusion systems such as ITER. In this work, we validated a simplified activation-transport model of the KATANA loop using time-resolved neutron measurements during reactor pulse operation. A finite volume of water in the KATANA loop was irradiated during reactor pulses, and the subsequent decay of Image 1001 was tracked with a He detector. For each reactor pulse two distinct activation peaks were observed, corresponding to successive passages of activated water, and showed excellent agreement with model predictions. The measurements enabled to determine loop parameters in particular the effective loop volume, which gave excellent agreement with the direct measurements. The presented validation provides a solid foundation for future experimental campaigns at the KATANA water activation facility, aimed at performing integral cross-section measurements of the Image 1002 reaction and advancing studies of activation phenomena relevant to fusion applications. nuclear reactors water activation JSI KATANA neutron measurements ITER aktivacija vode Institut Jožef Stefan KATANA nevtronske meritve ITERj true false true Elsevier Nizozemska Angleški jezik Slovenski jezik © 2025 Korean Nuclear Society, Published by Elsevier Korea Neznano 2026-01-12 10:40:40 2026-01-12 10:40:41 2026-01-13 03:45:12 0000-00-00 00:00:00 2026 0 0 Nasl. z nasl. zaslona; Opis vira z dne 9. 1. 2026; Soavtorji: Domen Kotnik, Domen Govekar, Luka Snoj, Vladimir Radulović; str. 1-7 iss. 4, [article no.] 104090 Vol. 58 Apr. 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2025-10-13 2025-12-17 2025-12-18 539.1 2234-358X 10.1016/j.net.2025.104090 264150275 https://www.sciencedirect.com/science/article/pii/S1738573325006588?via%3Dihub 1 c5a73335-ef9a-11f0-94a7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=37840 RAZ_Peric_Julijan_2026.pdf RAZ_Peric_Julijan_2026.pdf 1 F90F216077AC4F58C8B6675606E9D02C 5e4807afb93573abad601c85bc28d26e27012de2b24a41659cdb4a98edcd337b 1a1882cd-ef9b-11f0-94a7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=37841 Institut Jožef Stefan 0 0 0