Tritiated Water Interaction with Stainless Steel

Longhurst, Glen R.

Idaho National Laboratory

关键词: Isotopic Exchange;    Dissociation;    Permeation;    Partial Pressure;    Tritium;   

DOI  :  10.2172/912459
RP-ID  :  INL/EXT-07-12584
RP-ID  :  DE-AC07-99ID-13727
RP-ID  :  912459

美国|英语

来源: UNT Digital Library

【 摘 要 】

Experiments conducted to study tritium permeation of stainless steel at ambient and elevated temperatures revealed that HT converts relatively quickly to HTO. Further, the HTO partial pressure contributes essentially equally with elemental tritium gas in driving permeation through the stainless steel. Such permeation appears to be due to dissociation of the water molecule on the hot stainless steel surface. There is an equilibrium concentration of HTO vapor above adsorbed gas on the walls of the experimental apparatus evident from freezing transients. The uptake process of tritium from the carrier gas involves both surface adsorption and isotopic exchange with surface bound water.