20.500.12556/RUL-168806 Neutron emission from water activation experiments and modeling under fusion-relevant conditions at the KATANA facility Jožef Stefan Institute’s water activation experiment, called KATANA, was developed to procure benchmark quality experiments on the water activation process. This paper presents the optimization process of the neutron detector holder to achieve the neutron flux measurement system with the highest detection efficiency. Water is activated by the nuclear reactions on oxygen isotopes. The active oxygen and nitrogen isotopes then decay, emitting gamma rays and neutrons with different energies. The reaction $^{17}$O(n,p)$^{17}$N is responsible for the emission of high-energy neutrons. In future fusion plants such as ITER, the neutron flux in the water cooling system will be high, with an estimated flux of approx Φ ≈ 10$^{13}$ n/cm$^2$s. Therefore, adequate shielding must be considered. The design and implementation of neutron flux measurement system at the KATANA water activation facility represents a significant step towards a better understanding of water activation processes. Despite the challenges associated with water activation experiments, the first test measurements of neutron emission during the water activation process have yielded promising results. The following results will be presented: the measured half-life for the decay of $^{17}$N, activity of $^{17}$N as a function of reactor power and water flow rate. The initial results indicate the possibility of using such a facility for the measurements of the integral cross section for the $^{17}$O(n,p)$^{17}$N reaction. water activation JSI KATANA neutron measurements MCNP optimization ITER experiments jedrska fizika KATANA aktivacija vode true false true Angleški jezik Slovenski jezik Članek v reviji 2025-04-25 09:16:57 2025-04-25 09:17:02 2025-04-26 04:14:42 0000-00-00 00:00:00 2025 0 0 7 str. art. 115052 Vol. 216 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 539.1 0920-3796 10.1016/j.fusengdes.2025.115052 234012931 1-s2.0-S0920379625002510-main.pdf 1-s2.0-S0920379625002510-main.pdf 1 938892A40C1625554AE5B0047AABF085 95b054014b76799904e9e74798e55d8f0170b637ac18a7dfa4b5c19d7e2cf670 564448da-21a4-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=209761 https://www.sciencedirect.com/science/article/pii/S0920379625002510 0 4f6d92c7-21a4-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=209760 Fakulteta za matematiko in fiziko 0 0 0