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Abstract
FiR1 TRIGA research reactor was in operation from 1962 until 2015 and its dismantling was finalized in March 2024. All LILW nuclear waste generated from the dismantling project will be sent for final disposal to Loviisa NPP site, operated by power company Fortum. This requires careful waste activity characterization to fulfill Loviisa’s waste acceptance criteria.
Activity characterization of the FiR1 project is based on both calculations and measurements. Preliminary results were calculated with MCNP and ORIGEN-S codes. These have been further validated and refined during the project by sample measurements to form material-wise nuclide vectors. Finally, the packed waste is characterized with the ISOCS gamma spectrometric measurement setup.
We describe the characterization methods, how they we utilized throughout the process and how the characterization results were reviewed and assessed. We also introduce specific challenges related to characterizing TRIGA research reactors and the connections with other aspects in decommissioning planning.
Activity characterization of the FiR1 project is based on both calculations and measurements. Preliminary results were calculated with MCNP and ORIGEN-S codes. These have been further validated and refined during the project by sample measurements to form material-wise nuclide vectors. Finally, the packed waste is characterized with the ISOCS gamma spectrometric measurement setup.
We describe the characterization methods, how they we utilized throughout the process and how the characterization results were reviewed and assessed. We also introduce specific challenges related to characterizing TRIGA research reactors and the connections with other aspects in decommissioning planning.
| Original language | English |
|---|---|
| Title of host publication | European Research Reactor Conference RRFM2024 - Proceedings |
| Publisher | European Nuclear Society (ENS) |
| Pages | 271-278 |
| ISBN (Electronic) | 978-92-95064-40-9 |
| Publication status | Published - 22 Apr 2024 |
| MoE publication type | D3 Professional conference proceedings |
| Event | European Research Reactor Conference, RRFM 2024 - Warsaw, Poland Duration: 21 Apr 2024 → 25 Apr 2024 |
Conference
| Conference | European Research Reactor Conference, RRFM 2024 |
|---|---|
| Country/Territory | Poland |
| City | Warsaw |
| Period | 21/04/24 → 25/04/24 |
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Decommissioning of FiR 1 research reactor
Airila, M. (Manager), Kotiluoto, P. (Manager), Auterinen, I. (Participant), Helin, J. (Participant), Kekki, T. (Participant), Kivelä, P. (Participant), Koivuranta, S. (Participant), Leskinen, A. (Participant), Räty, A. (Participant), Suolanen, V. (Participant), Vento, S. (Participant), Viitanen, P. (Participant), Helynen, S. (Owner), Nyman, T. (Owner), Ruokola, E. (Participant), Tanhua-Tyrkkö, M. (Participant), Vanttola, T. (Participant), Vilkamo, O. (Participant), Hokkinen, J. (Participant), Itälä, A. (Participant), Järvinen, J. (Participant), Pekko, T. (Participant), Järvenpää, J. (Participant) & Kupiainen, V. (Participant)
1/04/15 → 31/12/24
Project: Finnish government project