Modeling of tritium release from beryllium in fusion blanket applications

Abstract

Only limited data are available on tritium release from irradiated Be. Few models have been suggested for tritium release from beryllium. Simple diffusion/desorption models have been proposed, but lack the capability of accounting for important phenomena such as burst release through interconnected porosity and the effect of the Be0 impurity layer. This paper describes the application of a new model for tritium release from Be, BETTY, to the analysis of recent experimental data. The model includes diffusion through Be and BeO, surface desorption and diffusion through interconnected porosity (as-fabricated or irradiation-induced). Tritium diffusion and desorption coefficients for Be and Be0 are estimated from the analysis and compared to previously estimated values.

Plasma-material interactions in current tokamaks and their implications for next step fusion reactors

“…TMAP4 also includes heat transfer, fluid flows, and chemical reactions in other than the solid state. Other codes such as BETTY [902] and ANFIBE [425,903], were developed for beryllium. While using the same solid-state transport equations, they include bubble formation, which has recently been recognised as a significant process for many materials at high plasma flux densities.…”

Plasma-material Interactions in Current Tokamaks and their Implications for Next-step Fusion Reactors

“…TMAP4 also includes heat transfer, fluid flows, and chemical reactions in other than the solid state. Other codes such as BETTY [902] and ANFIBE [425,903], were developed for beryllium. While using the same solid-state transport equations, they include bubble formation, which has recently been recognised as a significant process for many (January 2001) materials at high plasma flux densities.…”