Divertor System Final Design and Key Issues

ARIES Electronic Project Meeting
December 4, 1998

Design Summary

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Summary and Key Issues

Geometry

Cross section of lower divertor

Tube shape

Tube internals

Manifold connection

Materials:

Plasma-facing materialpure W
Structurepure W
Heat sinkporous W
ManifoldingFerritic steel
CoolantHe at 12 MPa
Main parameters:

Total divertor area113 m2
Transport power451 MW (up from 345 MW in J-strawman)
Inboard/outboard power split10/90%
Average outboard divertor heat flux3.6 MW/m2
Peak divertor heat flux (assumed)5 MW/m2
.
Length of divertor plates1.5 m
PMHX pipe ID/OD2.4/2.8 cm

Performance Metrics

Inlet/outlet temperature350/550 °C
Peak surface temperature816 °C
Peak stress393 MPa