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Manufacturing of PAV-ONE, a Permeator against Vacuum Mock-Up with Niobium Membrane

Authors :
Francesca Papa
Alessandro Venturini
Gianfranco Caruso
Serena Bassini
Chiara Ciantelli
Angela Fiore
Vincenzo Cuzzola
Antonio Denti
Marco Utili
Source :
Energies, Vol 16, Iss 14, p 5471 (2023)
Publication Year :
2023
Publisher :
MDPI AG, 2023.

Abstract

The Permeator Against Vacuum (PAV) is one of the proposed technologies for the Tritium Extraction System of the WCLL BB (Water-Cooled Lithium-Lead Breeding Blanket) of the EU DEMO reactor. In this paper, the manufacturing of the first PAV mock-up with a niobium membrane with a cylindrical configuration is presented. This work aimed to demonstrate the possibility of manufacturing a relevant-size PAV to be later tested in the TRIEX-II facility. The adopted prototypical solutions are described in detail, starting with the methodology developed to join the Nb tubes with a 10CrMo9-10 (A182 F22) plate. Dedicated manufacturing and welding procedures, based on vacuum brazing with a nickel-based brazing alloy, were developed to solve the problem. This new kind of brazing was first analyzed to check the morphology of the joint and then tested to check its capability to withstand the TRIEX-II operative conditions. In parallel, the compatibility with a lithium-lead environment was analyzed by exposing samples of niobium and 10CrMo9-10 (A335 P22) to a flow of the eutectic alloy at 500 °C up to 4000 h. Finally, the PAV mock-up was installed in the TRIEX-II facility.

Details

Language :
English
ISSN :
19961073
Volume :
16
Issue :
14
Database :
Directory of Open Access Journals
Journal :
Energies
Publication Type :
Academic Journal
Accession number :
edsdoj.6c75fefc684d81aed9ed05a68b7cde
Document Type :
article
Full Text :
https://doi.org/10.3390/en16145471