Figure II-1. Tritium confinement scheme

DOE-HDBK-6004-99

H&V Exhaust

Recirculating Gas

System

Tritium

Cleaning

Transfer

Purification

Storage

Recovery

Primary Confinement

Secondary Confinement

H&V Transfer

Tertiary Confinement

H&V Supply

Quaternary Confinement

Fresh Air

Inlet

Figure II-1. Tritium confinement scheme.

The function of each major tritium area within primary confinement is as follows:

Tritium Storage

The tritium inventory resides in the storage medium unless it is undergoing transfer, recovery,

purification or burning in the fusion machine. The storage medium can be tankage or hydride

beds.

Tritium Transfer

The transfer function moves tritium from one part of the primary confinement to another or to

the fusion machine vacuum vessel or a pellet process. The transfer motive force can be either

residual differential pressure, or active pumping, or thermal cycling of a hydride bed, or all three.