\contentsline {chapter}{\numberline {5}IMPURITY CONTROL SYSTEM}{5-1}
\contentsline {section}{\numberline {5.1. }INTRODUCTION}{5-1}
\contentsline {section}{\numberline {5.2. }EDGE-PLASMA SIMULATIONS}{5-3}
\contentsline {subsection}{\numberline {5.2.1. }Computational Models}{5-3}
\contentsline {subsection}{\numberline {5.2.2. }Simulation Results}{5-4}
\contentsline {subsubsection}{\numberline {5.2.2.1. }Results from the B2 code}{5-7}
\contentsline {subsubsection}{\numberline {5.2.2.2. }Results from the EPIC code}{5-7}
\contentsline {subsubsection}{\numberline {5.2.2.3. }Discussion}{5-9}
\contentsline {subsection}{\numberline {5.2.3. }Particle Exhaust and Pumping}{5-14}
\contentsline {section}{\numberline {5.3. }EROSION}{5-15}
\contentsline {subsection}{\numberline {5.3.1. }First-Wall Erosion}{5-16}
\contentsline {subsection}{\numberline {5.3.2. }Divertor-Target Erosion}{5-18}
\contentsline {section}{\numberline {5.4. }DIVERTOR DESIGN AND ENGINEERING}{5-19}
\contentsline {subsection}{\numberline {5.4.1. }Divertor Material and Manufacturing}{5-19}
\contentsline {subsection}{\numberline {5.4.2. }Divertor Configuration}{5-20}
\contentsline {subsection}{\numberline {5.4.3. }Finite-Element Thermostructural Analyses}{5-22}
\contentsline {subsubsection}{\numberline {5.4.3.1. }Thermal analysis}{5-24}
\contentsline {subsubsection}{\numberline {5.4.3.2. }Stress analysis}{5-24}
\contentsline {subsubsection}{\numberline {5.4.3.3. }Engineering safety factor}{5-27}
\contentsline {section}{\numberline {5.5. }THERMAL RESPONSE TO PLASMA DISRUPTION}{5-27}
\contentsline {subsection}{\numberline {5.5.1. }Model}{5-30}
\contentsline {subsubsection}{\numberline {5.5.1.1. }Thermal response models}{5-30}
\contentsline {subsubsection}{\numberline {5.5.1.2. }Thermo-fluid dynamic-response models}{5-31}
\contentsline {subsection}{\numberline {5.5.2. }Results and Discussion}{5-32}
\contentsline {section}{\numberline {5.6. }PELLET FUELING SYSTEM}{5-36}
\contentsline {subsection}{\numberline {5.6.1. }Pellet-Injection-System Specifications}{5-38}
\contentsline {subsubsection}{\numberline {5.6.1.1. }Pellet ablation/penetration calculations}{5-39}
\contentsline {subsubsection}{\numberline {5.6.1.2. }ARIES-I pellet-fueling specifications}{5-42}
\contentsline {subsection}{\numberline {5.6.2. }ARIES-I Pellet-Injection System}{5-42}
\contentsline {subsubsection}{\numberline {5.6.2.1. }System description}{5-42}
\contentsline {subsubsection}{\numberline {5.6.2.2. }System layout}{5-45}
\contentsline {subsubsection}{\numberline {5.6.2.3. }Single-stage light-gas-gun analysis}{5-47}
\contentsline {subsubsection}{\numberline {5.6.2.4. }Two-stage light-gas-gun analysis}{5-52}
\contentsline {subsubsection}{\numberline {5.6.2.5. }Pellet injection line}{5-57}
\contentsline {subsubsection}{\numberline {5.6.2.6. }System gas flows}{5-59}
\contentsline {subsubsection}{\numberline {5.6.2.7. }Neutron activation and maintenance approach}{5-62}
\contentsline {subsubsection}{\numberline {5.6.2.8. }Component reliability}{5-63}
\contentsline {subsubsection}{\numberline {5.6.2.9. }Safety and tritium containment}{5-63}
\contentsline {section}{\numberline {5.7. }SUMMARY AND R\&D DIRECTIONS}{5-65}
\contentsline {section}{REFERENCES}{5-68}