Deuterium fractional distillation effect

Reference 15 estimates the azeotrope concentration at 2,000 wppm tritium while Reference 14 estimates 3 wppm of deuterium (corresponding to 4 wppm tritium). If the high value is correct, a dilute tritium solution will have a vapor that is less rich in tritium than is the melt. As the vapor is removed, both the vapor and the melt would increase in tritium concentration until a constant boiling point mixture at the azeotrope concentration is achieved. If the lower azeotrope concentration is correct, fractional distillation could be effective. However, these arguments are complicated by the presence of other tritium vapor phases such as LiT. 

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