D R A F T - 16-Jan-2006
WBS 3.2 TRITIUM PLANT

Isotope Separation System (ISS)

Procurement Package 3.2-3
"Hydrogen Isotopes Separation"
ITER Cost 2001 for Sharing: 6.20 kIUA
Sharing: EU = 88%; ITER (fund) = 12%
Function, Scope of Supply:

Main functions of the ITER Tritium Plant are:
- to prepare the gas mixtures required for fuelling the ITER machine and to deliver these gases at specified compositions and flow rates
- to process the gases returned from the machine in order to separate impurities and detritiate them prior to controlled release to the environment
- to receive gases from other sources within ITER (e. g. Test Breeder Blanket Modules, Hot Cell) and introduce them into the main fuel loop
- to receive and assay tritium imported from off-site

This procurement package is related to the Isotope Separation System (ISS) which has the function to separate the fed hydrogen isotope mixtures into gas streams of specified hydrogen isotopic compositions.

Description, Technologies :

The isotope separation system utilizes cryogenic distillation and catalytic reaction for isotope exchange to separate elemental hydrogen isotope gas mixtures. The various feed streams are introduced at two feed locations in the cascade where distillation of the six isotopic species takes place to separate the following product streams:
- one detritiated protium stream (T < 10-7) to be recycled to the water detritiation system,
- two distinct deuterium streams: (i) T< 200 ppm for NB injector, ii) H < 0.5%, T < 0.5%) for gas fuelling,
- two tritium fuelling streams, one with 50% T/50%D and one with 90% T/10%D isotopic composition.

Main EIDI Activities Codes
70000
SPECIAL TRITIUM SYSTEMS AND COMPONENTS