Progress of Cryogenics and Isotopes Separation , ISSN: 1582-2575
2004, Volume 7, Issue 13+14

Possibilities for Reorientation the Activity of Heavy Water Plants

F. Pop 1 , C. Croitoru 1 , Gh. Titescu 1 , I. Stefanescu 1 , I. Hodor 2 , S. Cuna 2

1 National R&D Institute for Cryogenics and Isotopes Technologies, ICSI Ramnicu Valcea
2 National R&D Institute of Isotopic and Molecular Technologies, Cluj-Napoca, Romania

*Corresponding author: Floarea Pop, e-mail:

Published: October 2004


In Romania heavy water is produced by H2O-H2S chemical exchange (GS process) and by water distillation, simultaneously working two lines. The distillation plants have high separation capacity, a distillation line being able to concentrate water from two GS lines. The paper presents data regarding possibilities to use one distillation line for oxygen 18 production, as pre-concentrates or finite products. Using a simulation program it was calculated oxygen 18 concentration in heavy water produced, maximum 18O concentration of pre-concentrate obtained on distillation line and the separation cascade dimensions for obtain 95% 18O, with first and second stage having same dimensions like a distillation plant from Romanian heavy water factory. Oxigen-18 separation factor is much lower than deuterium separation factor. For this reason, oxygen-18 is a very expensive product.


Oxygen-18, heavy water, distillation.

Tag search Oxygen-18 heavy water distillation