A similarity study on absorption/desorption cycles using ZrCo-H2 for ITER hydrogen getter material

Abstract

Consecutive absorption/desorption cycles of the ZrCo-H2 system were studied to simulate the real ITER hydrogen getter system. ZrCo getter was used in this study instead of the depleted uranium (DU) getter material which was recently considered as the hydrogen getter in ITER. In a cyclic PCI measurement the high-pressure Sievert apparatus seems impractical to describe the equilibrium state of the ZrCo-H2 system in detail, especially for the desorption stage. This high-pressure Pressure-Composition Isotherm (PCI) apparatus, however, shows a cause-and-effect well, from the previous getter state to the following state in presenting hydriding/dehydriding performance. In case of the ZrCo-H2 system or in case of the DU-H2 system, having multiple getter bed battery, a similar affection by the previous getter status might be related and a similar aspect could be shown to should consider further in ITER design, for example a need for control logic, from PCI measurements using a high-pressure Sievert apparatus.