Assumptions

Vacuum Vessel Free Volume

• 785 m3

Tungsten Dust

• 100 kg at 2.11 microns, 10 kg at 0.1 microns - ITER spec

GBR

• 5625 m3

• 2355 m2 wall area and 1500 m2 ceiling and floor

Leakage

• One air exchange per day.

• One volume loss per day at 400 Pa overpressure

• HVAC closed after 1 hour

In-vessel component surface areas exposed to free volume

• BKT 330 m2
• DV 135.4 m2
• Reflector 230 m2
• LT shield 230 m2
• VV 846 m2

In-vessel components

• Temperatures set to outlet design values

• Reduced linearly to inlet temperatures and then cooled at 30°C/hr until 225°C reached

0.02 m2, 10 m long

Tritium

• Used 2.6 kg HTO

• Actual value TBD

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