Abstract
Fire safety analysis of the cryostat inside the Tokamak building
of the demonstration fusion power plant DEMO is introduced in
this paper. In the cryostat, fires can occur only during long maintenance breaks when there is air inside, that is, no vacuum as in normal operation. In the analysis, different tools with varying levels of complexity (analytical calculations, zone fire models, CFD
simulation) were used, and their applicability for different purposes were assessed. The simulations showed that fires inside the cryostat are not threatening the load bearing capacity of the cryostat globally. Some local problems close to the fire might arise, but these can be dealt with a proper design with enough robustness for load-bearing capacity. It should be noted that the available specifications, which this study is based on, are still at a very early stage, and many assumptions had to be made in the study.
of the demonstration fusion power plant DEMO is introduced in
this paper. In the cryostat, fires can occur only during long maintenance breaks when there is air inside, that is, no vacuum as in normal operation. In the analysis, different tools with varying levels of complexity (analytical calculations, zone fire models, CFD
simulation) were used, and their applicability for different purposes were assessed. The simulations showed that fires inside the cryostat are not threatening the load bearing capacity of the cryostat globally. Some local problems close to the fire might arise, but these can be dealt with a proper design with enough robustness for load-bearing capacity. It should be noted that the available specifications, which this study is based on, are still at a very early stage, and many assumptions had to be made in the study.
| Original language | English |
|---|---|
| Pages (from-to) | 34-41 |
| Journal | Palotutkimuksen päivät |
| Volume | 2025 |
| Publication status | Published - 2025 |
| MoE publication type | D1 Article in a trade journal |
| Event | Palotutkimuksen päivät 2025 - Helsinki Duration: 3 Sept 2025 → 4 Sept 2025 |
Funding
European Union via the Euratom Research and Training Programmer (Grant Agreement No 101052200-EUROfusion.
