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Tesi etd-04082021-174453


Tipo di tesi
Tesi di laurea magistrale
Autore
STEFANINI, PIETRO
URN
etd-04082021-174453
Titolo
Thermal Hydraulic Investigation of the CIRCE-THETIS Facility by the use of STH and CFD Codes
Dipartimento
INGEGNERIA CIVILE E INDUSTRIALE
Corso di studi
INGEGNERIA NUCLEARE
Relatori
relatore Prof. Forgione, Nicola
correlatore Dott. Pucciarelli, Andrea
correlatore Dott. Di Piazza, Ivan
Parole chiave
  • CFD
  • CIRCE-THETIS
  • heavy liquid metals
  • RELAP5-3D
  • STH
Data inizio appello
26/04/2021
Consultabilità
Non consultabile
Data di rilascio
26/04/2091
Riassunto
The aim of this work is to investigate possible thermal stratification phenomena inside the CIRCE-THETIS facility by mean of both STH and CFD codes. Codes capabilities were firstly evaluated by simulating the previous CIRCE-HERO configuration with both RELAP5-3D and ANSYS Fluent codes and comparing the numerical results with the available experimental data. This benchmark also worked as a validation process allowing to understand the capabilities of the RELAP5-3D STH code in dealing with large 3D domains.
The results by RELAP5-3D and ANSYS Fluent showed a good agreement with experimental data and thus pre-Tests simulations were performed adopting the selected codes for the CIRCE-THETIS facility, too. Results provided by the two codes are discussed deeply both highlighting weaknesses and capabilities of the adopted modelling techniques.
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