Sorption of Tritium and Trittated Water on Construction Materials

User's manual for RESRAD-BUILD version 3.

“…In general, sorption and desorption of HT occurs faster than that of HTO; however, the total amount sorbed and desorbed is greater for HTO than for HT (Wong et al 1991;Dickson and Miller 1992). On the other hand, HT can easily be converted to HTO in the environment.…”

“…In contrast, HT can easily be converted to HTO in the environment. Experimental data concerning the tritium soaking effect on construction metals also showed that about 90% of the tritium desorbed from metal samples was in the form of HTO, although the samples were exposed to an atmosphere of HT (Dickson and Miller 1992). Because of the conversion from HT to HTO and the potentially longer time required for degassing of HTO (desorption and subsequent release from the contaminated material to the indoor air), the tritium model incorporated into the RESRAD-BUILD code considers only the potential degassing of HTO after the tritium-handling operation has stopped.…”

Tritium radioluminescent devices, Health and Safety Manual

“…Based on a survey of laboratories and reactors by , later experimental studies by Blet et al (1991) and Dickson and Miller (1991), and the results of reported decontaminations of stainless steel and tritium facilities by Anatoniazzi et al (1991), Christ and Wehner (1991) Reactions in four types of gas-filled light tubes will be discussed below. The first type, which contains the least tritium, consists of a small device with less than 1 Ci.…”

Transfer of tritium in concrete coated with hydrophobic paints

“…Therefore, the T concentration in room air remains much higher than the MAC for short time immediately after the accidental T release. Then, concrete is exposed to high-radioactive HTO vapor, and it can permeate through concrete walls [4][5][6][7][8]. In addition, there is also possibility that some HTO remains inside concrete walls because of chronic contact with HTO vapor for a long time [7].…”

“…So-called soaking effect is the phenomena that highconcentration T remains in laboratory air even after ADS has launched [7][8][9][10]. The history of the T concentration in air sometimes shows a two-step desorption curve for a long time when ADS start operating.…”