Design and structural analysis considerations and methodology usedin evaluating the BPX inboard limiter module design

摘要

The authors summarize the design and analysis efforts conductedduring the conceptual design activities for the Burning PlasmaExperiment (BPX) inboard limiter. The key material requirement was thatthe plasma-facing surface must be carbon with an allowable peak surfacetemperature of 1700° C. To meet this requirement with a passivelycooled design, a relatively thick, high-conductivity plasma-facingmaterial must be used. Reinforced carbon-carbon materials can meet thehigh thermal conductivity requirements and should have mechanicalproperties that are adequate to withstand the electromagnetic loadings.The BPX inboard limiter design also requires the capability ofin-service replacement and adjustment to align limiter surfaces within±1 mm using remote maintenance equipment. These requirements,along with the need to minimize the thickness envelope while spanningthe vacuum vessel joint connection areas, dictate a modular designapproach using a combination carbon-carbon tile and metallic frame.Various analyses were conducted to define the individual carbon-carbontile and metallic frame shapes and sizes capable of sustaining thesevere thermal and electromagnetic induced loadings