| Title: | Simulation of water activation in the KATANA activation loop of the TRIGA reactor |
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| Authors: | ID Lesjak, Primož, Institut "Jožef Stefan" (Author)
ID Čufar, Aljaž, Institut "Jožef Stefan" (Author)
ID Kotnik, Domen, Institut "Jožef Stefan" (Author)
ID Peric, Julijan, Institut "Jožef Stefan" (Author)
ID De Pietri, Marco (Author)
ID Snoj, Luka, Institut "Jožef Stefan" (Author) |
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| Files: |  URL - Source URL, visit https://www.sciencedirect.com/science/article/pii/S0920379626000992?via%3Dihub
 PDF - Presentation file, download (3,03 MB)
MD5: 06DE50FDC3BD2085FFC163FF4B74868A
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  IJS - Jožef Stefan Institute
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| Abstract: | Water is widely used as a coolant in both fission and fusion nuclear reactors. However, when exposed to neutrons, it becomes activated and can turn into a significant radiation source especially in fusion reactors operating with deuterium–tritium plasma. This effect influences reactor design and requires accurate modeling to ensure safe and reliable operation. During the development of the ITER fusion reactor, methods and codes were created to simulate the process of water activation and its flow through the cooling system. However, lack of relevant experiments needed for experimental validation of these codes was highlighted. In 2024, the KATANA water activation facility began operating at the TRIGA Mark II reactor at the Jožef Stefan Institute with the aim to improve understanding of water activation and to validate computational tools used for simulating it. This paper presents an analysis of water activation in the KATANA loop using the open-source FLUNED code, which integrates fluid dynamics with neutron and gamma-ray transport simulations. The analysis focuses on activation calculations based on the latest loop design. Additionally, we examine how uncertainties in some of the main input parameters, i.e. flow rate and the total volume of the loop components, influence the overall uncertainty in the determined activity of water. |
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| Keywords: | water activation, KATANA, IJS TRIGA |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 06.10.2025 |
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| Article acceptance date: | 07.03.2026 |
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| Publication date: | 16.03.2026 |
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| Publisher: | Elsevier |
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| Year of publishing: | 2026 |
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| Number of pages: | str. 1-8 |
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| Numbering: | Vol. 227, [article no.] 115711 |
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| Source: | Nizozemska |
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| PID: | 20.500.12556/DiRROS-28544  |
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| UDC: | 539.1 |
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| ISSN on article: | 1873-7196 |
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| DOI: | 10.1016/j.fusengdes.2026.115711 |
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| COBISS.SI-ID: | 272669187 |
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| Copyright: | © 2026 The Authors. |
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| Note: | Nasl. z nasl. zaslona;
Opis vira z dne 23. 3. 2026;
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| Publication date in DiRROS: | 23.03.2026 |
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| Views: | 69 |
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| Downloads: | 44 |
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