ITER Diagnostic First Wal
Authors: G. Douglas Loesser, et. al.
Abstract:
The ITER Diagnostic Division is responsible for
designing and procuring the First Wall Blankets that
are mounted on the vacuum vessel port plugs at both
the upper and equatorial levels This paper will discuss
the effects of the diagnostic aperture shape and
configuration on the coolant circuit design. The DFW
design is driven in large part by the need to conform the
coolant arrangement to a wide variety of diagnostic
apertures combined with the more severe heating
conditions at the surface facing the plasma, the first
wall. At the first wall, a radiant heat flux of 35W/cm2
combines with approximate peak volumetric heating
rates of 8W/cm3 (equatorial ports) and 5W/cm3 (upper
ports). Here at the FW, a fast thermal response is
desirable and leads to a thin element between the heat
flux and coolant. This requirement is opposed by the
wish for a thicker FW element to accommodate surface
erosion and other off-normal plasma events.
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Submitted to: TOFE Conference, Nashville, TN (August 2012)
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Download PPPL-4813 (pdf 4.25 MB 5 pp)
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