The production of electricity from nuclear fusion is one of the most ambitious projects ever carried out. With the aim of building DEMO, the first commercial reactor, within the international framework of the EUROfusion project, the development of the Breeding Blanket (BB) among the different components is of essential. This device has the task of shielding other components from radiation, guaranteeing a continuous production of Tritium, and ensuring an effective extraction of heat for the production of electricity. One of the most promising proposals is the Water-Cooled-Lithium-Lead BB, it will mainly consist of a water-cooling circuit, integrated within an elementary cell that will allow the flow of a liquid lead-lithium mixture. The probability that the metal alloy and pressurized water come into contact in an accidental scenario is minimal but not negligible. Extensive research activities are carried out at CR ENEA Brasimone with the aim of deepening the knowledge of the phenomena that occur during the accident scenario and validating numerical codes such as SIMMER and RELAP5/Mod3.3. The LIFUS5/Mod3 facility has the task of simulating the breakage of a water tube inside the liquid Pb-Li. In this context, this thesis work arises from the need to support the execution of the tests belonging to campaign E with the analysis of experimental data and the development of a model of the water injection line in RELAP5/Mod3, in parallel to a sensitivity analysis. In addition, several support tests were carried out to characterize the facility and improve the predictive capabilities of the model.
La produzione di energia elettrica a partire dalla fusione nucleare è uno dei progetti più ambiziosi mai realizzati. Con lo scopo di costruire il reattore commerciale DEMO, nell'ambito internazionale del progetto EUROfusion, è di vitale importanza lo sviluppo del Breeding Blanket (BB) tra i diversi componenti. Questo elemento ha il compito di schermare dalle radiazioni altri componenti, garantire una produzione continua di Trizio e assicurare una efficace estrazione di calore per la produzione di energia elettrica. Una delle proposte più promettenti è il Water-Cooled-Lithium-Lead BB, esso sarà composto principalmente da un circuito di raffreddamento ad acqua, integrato all’interno di una cella elementare che permetterà il flusso di una miscela liquida di Piombo-Litio. La probabilità che la lega metallica e l’acqua pressurizzata entrino in contatto in uno scenario incidentale è minima ma non trascurabile. Estese attività di ricerca vengono realizzate presso il CR ENEA Brasimone con lo scopo di approfondire la conoscenza dei fenomeni che avvengono durante lo scenario incidentale e validare codici numerici come SIMMER e RELAP5/Mod3.3. L’impianto LIFUS5/Mod3 ha il compito di simulare la rottura di un tubo del circuito ad acqua all’interno del Pb-Li liquido. In questo contesto, questo lavoro di tesi nasce dalla necessità di supportare l’esecuzione dei test appartenenti alla campagna E con l’analisi dei dati esperimentali e lo sviluppo di un modello della linea iniezione ad acqua in RELAP5/Mod3, in parallelo ad un’analisi di sensibilità. Inoltre, sono stati effettuati diversi test di supporto per caratterizzare l’impianto e migliorare le capacità predittive del modello.
Experimental and numerical analysis of the LIFUS5/Mod3 facility water injection system
Jaramillo Sierra, Diego
2020/2021
Abstract
The production of electricity from nuclear fusion is one of the most ambitious projects ever carried out. With the aim of building DEMO, the first commercial reactor, within the international framework of the EUROfusion project, the development of the Breeding Blanket (BB) among the different components is of essential. This device has the task of shielding other components from radiation, guaranteeing a continuous production of Tritium, and ensuring an effective extraction of heat for the production of electricity. One of the most promising proposals is the Water-Cooled-Lithium-Lead BB, it will mainly consist of a water-cooling circuit, integrated within an elementary cell that will allow the flow of a liquid lead-lithium mixture. The probability that the metal alloy and pressurized water come into contact in an accidental scenario is minimal but not negligible. Extensive research activities are carried out at CR ENEA Brasimone with the aim of deepening the knowledge of the phenomena that occur during the accident scenario and validating numerical codes such as SIMMER and RELAP5/Mod3.3. The LIFUS5/Mod3 facility has the task of simulating the breakage of a water tube inside the liquid Pb-Li. In this context, this thesis work arises from the need to support the execution of the tests belonging to campaign E with the analysis of experimental data and the development of a model of the water injection line in RELAP5/Mod3, in parallel to a sensitivity analysis. In addition, several support tests were carried out to characterize the facility and improve the predictive capabilities of the model.| File | Dimensione | Formato | |
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https://hdl.handle.net/10589/175632