Title :
Phase Lag Infra-red Thermal Examination (PLITE); A New Non-destructive Test Process
Author :
McDonald, J.M. ; Lutz, T.J. ; Ulrickson, M.A. ; Tanaka, T.J. ; Youchison, D.L. ; Nygren, R.E.
Author_Institution :
Sandia Nat. Lab., Albuquerque
Abstract :
The International Organization of ITER (International Thermonuclear Experimental Reactor) specifies a requirement of 3 mm in diameter for the largest permissible flaw in the joint of the beryllium (Be) armor tiles and the underlying heat sink made of a copper-chrome-zirconium (CuCrZr) alloy for the first wall (FW). We investigated the sensitivity of a new non-destructive process of detecting these flaws using a method in which we mapped the phase lag of the temperatures on the surface of a sample during thermal cycling with a sinusoidally varying water temperature. A method with hot-cold water test that we had pioneered during the 1990´s for the development of a water-cooled mid-plane modular limiter for Tore Supra had worked well with the high conductivity armor made of pyrolytic graphite brazed to copper tubes. The paper describes the experimental system, test samples and some experimental results.
Keywords :
Tokamak devices; beryllium; chromium alloys; copper alloys; flaw detection; fusion reactor design; fusion reactor materials; heat sinks; infrared imaging; tiles; zirconium alloys; Be; CuCrZr; ITER; International Thermonuclear Experimental Reactor; PLITE; Phase Lag Infrared Thermal Examination; beryllium armor tiles; design requirements; first wall; flaw detection; heat sink; high conductivity armor; hot-cold water test; infrared thermography; nondestructive process; sinusoidally varying water temperature; thermal cycling; Conductivity; Copper alloys; Heat sinks; Inductors; Nondestructive testing; Plasma materials processing; Plasma temperature; System testing; Temperature sensors; Tiles; component; first wall; high heat flux;
Conference_Titel :
Fusion Engineering, 2007. SOFE 2007. 2007 IEEE 22nd Symposium on
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-1193-1
Electronic_ISBN :
978-1-4244-1194-8
DOI :
10.1109/FUSION.2007.4337873
