Graphite limiter and armor damage in Doublet III

Conference · Wed Sep 01 04:00:00 EDT 1982

OSTI ID:6553378

McKelvey, T; Taylor, T; Trester, P

Graphite coated with TiC has been used extensively in Doublet III for limiters and neutral beam armor. Performance of these components has been superior to that of the metal components previously used. Damage to the coated graphite has occurred and can be classified into three categories: (1) gross failure of the graphite due to thermal stresses induced by the combination of high applied energy fluxes and mechanical restraint, (2) surface failure of the graphite due to runaway electron impingement, and (3) loss of TiC coating due to arcing, sputtering, vaporization and spalling, primarily during plasma disruptions and other abnormal plasma conditions. Design improvements are being continually implemented to minimize this damage and its consequences.

• Research Organization: General Atomic Co., San Diego, CA (USA); Japan Atomic Energy Research Inst., Tokyo
• DOE Contract Number: AT03-76ET51011; AT03-80SF11512
• OSTI ID: 6553378
• Report Number(s): GA-A-16748; CONF-820948-6; ON: DE83003218
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209* -- Fusion Power Plant Technology-- Component Development & Materials Testing
CARBIDES
CARBON
CARBON COMPOUNDS
DOUBLET REACTORS
ELECTRONS
ELEMENTAL MINERALS
ELEMENTARY PARTICLES
ELEMENTS
EROSION
FERMIONS
GRAPHITE
LEPTONS
LIMITERS
MINERALS
NONMETALS
NUCLEAR REACTIONS
RUNAWAY ELECTRONS
SHIELDING
SPALLATION
SPUTTERING
STRESSES
THERMAL STRESSES
THERMONUCLEAR REACTORS
TITANIUM CARBIDES
TITANIUM COMPOUNDS
TOKAMAK TYPE REACTORS
TRANSITION ELEMENT COMPOUNDS