Multiscale integral analysis of a HT leakage in a fusion nuclear power plant

9th International Conference on Inertial Fusion Sciences and Applications

Velarde, M.^1 ; Fradera, J.^2 ; Perlado, J.M.^1 ; Zamora, I.^2 ; Martinez-Saban, E.^2 ; Colomer, C.^2 ; Briani, P.^2

Institute of Nuclear Fusion, Technological University of Madrid, José Gutiérrez Abascal 2, Madrid

28006, Spain^1

Idom Nuclear Services, Gran Via Carlos III 97 bajos, Barcelona

08028, Spain^2

关键词: Atmospheric transport;    Heating ventilation and air conditioning;    Integral analysis;    Multi scale analysis;    Nuclear fusion;    Secondary loops;    Secondary-side;    Site environments;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/717/1/012114/pdf
DOI  :  10.1088/1742-6596/717/1/012114

来源: IOP

【 摘 要 】

The present work presents an example of the application of an integral methodology based on a multiscale analysis that covers the whole tritium cycle within a nuclear fusion power plant, from a micro scale, analyzing key components where tritium is leaked through permeation, to a macro scale, considering its atmospheric transport. A leakage from the Nuclear Power Plants, (NPP) primary to the secondary side of a heat exchanger (HEX) is considered for the present example. Both primary and secondary loop coolants are assumed to be He. Leakage is placed inside the HEX, leaking tritium in elementary tritium (HT) form to the secondary loop where it permeates through the piping structural material to the exterior. The Heating Ventilation and Air Conditioning (HVAC) system removes the leaked tritium towards the NPP exhaust. The HEX is modelled with system codes and coupled to Computational Fluid Dynamic (CFD) to account for tritium dispersion inside the nuclear power plants buildings and in site environment. Finally, tritium dispersion is calculated with an atmospheric transport code and a dosimetry analysis is carried out. Results show how the implemented methodology is capable of assessing the impact of tritium from the microscale to the atmospheric scale including the dosimetric aspect.