Experimental and modelling studies on the exposure of wall surfaces to tritium gas in ambient room conditions

Journal Article · Sun Oct 01 04:00:00 EDT 1995 · Fusion Technology

OSTI ID:196724

Housiadas, C; Douglas, K ^[1]

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1. Safety Technology Inst., Ispra (Italy)

An experimental set-up is used to carry out static exposure tests to study the uptake and oxidation of tritium released in ambient room air, routinely or accidentally, in the presence of selected surface materials. Tritium, in its elemental form at concentrations of the order of approx.0.4 GBq/m{sup 3} (10{sup -2} Ci/m{sup 3}), is injected into the glass exposure chamber containing the selected surface material and air at atmospheric pressure. Periodically, samples of the chamber atmosphere are analysed, using liquid scintillation counting, to obtain the concentrations of HTO and T{sub 2}. The exposures have been performed using aluminium, 316L stainless steel and painted stainless steel plates, as the selected surface materials. Results are compared with predictions using the ITER approved TMAP4 code. The results indicate practically the same conversion rate, of about 0.02% per day, for both the aluminium and stainless steel samples and give reasonable agreement with modelling predictions. Strong absorption of both T{sub 2} and HTO by the painted surface is observed, suggesting the use of high values for the solubility constant to correctly predict this behaviour. 19 refs., 5 figs., 1 tab.

• OSTI ID: 196724
• Report Number(s): CONF-950506--
• Journal Information: Fusion Technology, Journal Name: Fusion Technology Journal Issue: 3 pt 1 Vol. 28; ISSN 0748-1896; ISSN FUSTE8
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
99 GENERAL AND MISCELLANEOUS
ABUNDANCE
ALUMINIUM
COMPUTER CODES
COMPUTERIZED SIMULATION
ENVIRONMENTAL EXPOSURE
STAINLESS STEEL-316L
SURFACE CONTAMINATION
TRITIUM
WALLS