Novel Non-Evaporable Getter Materials and Their Possible Use in Fusion Application for Tritium Recovery

Molecules

Silvano Tosti¹  Antonio Frattolillo¹  Luca Farina¹  Alessia Santucci¹ 

[1] ENEA, Fusion and Technology for Nuclear Safety and Security Department, Via E. Fermi 45, 00044 Frascati, Italy;

关键词: non-evaporable getter;    tritium recovery;    hydrogen adsorption;   

DOI  :  10.3390/molecules25235675

来源: DOAJ

【 摘 要 】

Non-evaporable getters (NEGs) are metallic compounds of the IV group, particularly titanium and/or zirconium-based alloys and are usually used as pumps in vacuum technologies since they are able to sorb, by chemical reactions, most of the active gas molecules, with particular efficacy towards hydrogen isotopes. This work suggests an alternative application of these materials to fusion nuclear reactors, where there is the need to recover small amount of tritium from the large helium flow rate composing the primary coolant loop. Starting from the tritium mass balance inside the primary coolant loop, the amount of coolant to be routed inside the coolant purification system (CPS) is identified. Then a feasibility study, based on the bulk getter theory, is presented by considering three different commercial alloys, named ST707, ST101 and ZAO. The results provide the mass, the area and the regeneration parameters of the three different alloys necessary to fulfill the requirements of the CPS unit. By comparing the features of the three alloys, the ZAO material appears the most promising for the proposed application because it requires the lower amount of material and a lower number of regeneration cycles.

【 授权许可】

Unknown