Tritium behavior in eroded dust and debris of plasma-facing materials
نویسندگان
چکیده
Tritium behavior in plasma-facing components (PFCs) of future tokamak reactors such as ITER is an essential factor in evaluating and choosing the ideal plasma-facing materials (PFMs). One important parameter that in ̄uences tritium buildup and release in candidate materials is the eect of material porosity on tritium diusion and retention. Diusion in porous materials, for example, consists of three dierent processes: along grain boundaries, along microcrystallite boundaries, and in pure crystallite structures. Such diusion processes have strong nonlinear behavior due to temperature, solubility, and existing trap sites. Therefore, a realistic model for tritium diusion in porous and neutron-irradiated materials must account for both nonlinear and multidimensional eects. A tritium transport computer model Tritium Accumulation in Porous Structure (TRAPS) has been developed to evaluate and predict the kinetics of tritium transport in porous media. This two-dimensional model incorporates tritium diusion and trapping processes that also account for hydrogen-isotope solubility limits in PFMs. This model is being coupled with the computer model Tritium In Compound System (TRICS) which has been developed to study the eects of surface erosion to tritium behavior in PFCs. Ó 1998 Elsevier Science B.V. All rights reserved.
منابع مشابه
Integrated Models for Plasma/Material Interaction during Loss of Plasma Confinement
A comprehensive computer package, High Energy Interaction with General Heterogeneous ‘&i.rget&ystems (HEIGHTS), has been developed to evaluate the damage incurred on plasma-facing materials during loss of plasma confinement. The HEIGHTS package consists of several integrated computer models that follow the start of a plasma disruption at the scrape-off layer (SOL) through the transport of the e...
متن کاملTritium Recycling and Inventory in Eroded Debris of Plasma-facing Materials*
The submitted manuscript has been created by the University of Chicago as Operator of Argome National Laboratory (“Argome”) under Contract No. W-31-109-ENG-38with the U.S. Deparhrrentof Energy. The U.S. Government retains for itself, and others acting on its behalf, a paid-up, nonexclusive, irrevocable worldwide license in said article to reproduce, prepare derivative works, distribute copies t...
متن کاملTritium Containment in the Dust and Debris of Plasma-Facing hlaterials Produced During Operations
متن کامل
Comprehensive physical models and simulation package for plasma/material interactions during plasma instabilities
Damage to plasma-facing components (PFCs) from plasma instabilities remains a major obstacle to a successful tokamak concept. The extent of the damage depends on the detailed physics of the disrupting plasma, as well as on the physics of plasma-material interactions. A comprehensive computer package called High Energy Interaction with General Heterogeneous Target Systems (HEIGHTS) has been deve...
متن کاملComprehensive Physical Models and Simulation Package for Plasma / Material Interactions during Plasma
Damage to plasma-facing components (PFCS) from plasma instabilities remains a major obstacle to a successful tokamak concept. The extent of the damage depends on the detailed physics of the disrupting plasma, as well as on the physics of plasmamaterial interactions. A comprehensive computer package called B igh Energy interaction with Qeneral Heterogeneous ~arget ~ystems (HEIGHTS) has been deve...
متن کامل