Dependence of Tritium Release from Stainless Steel on Temperature and Water Vapor
Abstract
The impact of water vapor and temperature on the release of tritium from stainless steel was studied. Degreased stainless steel samples loaded with tritium at room temperature following a 24-h degassing in vacuum at room temperature were subjected to increasing temperatures or humidity. In general, increasing either the sample temperature or the humidity causes an increased quantity of tritium to be removed. Increasing the temperature to 300°C in a dry gas stream results in a significant release of tritium and is therefore an effective means for reducing the tritium inventory in steel. For humid purges at 30°C, a sixfold increase in humidity results in a tenfold increase in the peak outgassing rate. Increasing the humidity from 4 parts per million (ppm) to 1000 ppm when the sample temperature is 100°C causes a significant increase in the tritium outgassing rate. Finally, a simple calculation shows that only 15% of the activity present in the sample was removed in these experiments, suggesting that the surface layer of adsorbed water participates in regulating tritium desorption from the surface.
- Authors:
-
- Univ. of Rochester, NY (United States). Lab. for Laser Energetics
- Univ. of Rochester, NY (United States)
- Publication Date:
- Research Org.:
- University of Rochester, Rochester, NY (United States). Laboratory for Laser Energetics
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1223346
- Grant/Contract Number:
- NA0001944
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Fusion Science and Technology
- Additional Journal Information:
- Journal Volume: 68; Journal Issue: 4; Journal ID: ISSN 1536-1055
- Publisher:
- American Nuclear Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; tritium; humidity-stimulated decontamination; temperature-driven decontamination
Citation Formats
Shmayda, W. T., Sharpe, M., Boyce, A. M., Shea, R., Petroski, B., and Schroeder, W. U. Dependence of Tritium Release from Stainless Steel on Temperature and Water Vapor. United States: N. p., 2015.
Web. doi:10.13182/FST14-913.
Shmayda, W. T., Sharpe, M., Boyce, A. M., Shea, R., Petroski, B., & Schroeder, W. U. Dependence of Tritium Release from Stainless Steel on Temperature and Water Vapor. United States. https://doi.org/10.13182/FST14-913
Shmayda, W. T., Sharpe, M., Boyce, A. M., Shea, R., Petroski, B., and Schroeder, W. U. Tue .
"Dependence of Tritium Release from Stainless Steel on Temperature and Water Vapor". United States. https://doi.org/10.13182/FST14-913. https://www.osti.gov/servlets/purl/1223346.
@article{osti_1223346,
title = {Dependence of Tritium Release from Stainless Steel on Temperature and Water Vapor},
author = {Shmayda, W. T. and Sharpe, M. and Boyce, A. M. and Shea, R. and Petroski, B. and Schroeder, W. U.},
abstractNote = {The impact of water vapor and temperature on the release of tritium from stainless steel was studied. Degreased stainless steel samples loaded with tritium at room temperature following a 24-h degassing in vacuum at room temperature were subjected to increasing temperatures or humidity. In general, increasing either the sample temperature or the humidity causes an increased quantity of tritium to be removed. Increasing the temperature to 300°C in a dry gas stream results in a significant release of tritium and is therefore an effective means for reducing the tritium inventory in steel. For humid purges at 30°C, a sixfold increase in humidity results in a tenfold increase in the peak outgassing rate. Increasing the humidity from 4 parts per million (ppm) to 1000 ppm when the sample temperature is 100°C causes a significant increase in the tritium outgassing rate. Finally, a simple calculation shows that only 15% of the activity present in the sample was removed in these experiments, suggesting that the surface layer of adsorbed water participates in regulating tritium desorption from the surface.},
doi = {10.13182/FST14-913},
journal = {Fusion Science and Technology},
number = 4,
volume = 68,
place = {United States},
year = {Tue Sep 15 00:00:00 EDT 2015},
month = {Tue Sep 15 00:00:00 EDT 2015}
}
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Works referencing / citing this record:
Progress in the Conceptual Design of the Helical Fusion Reactor FFHR-d1
journal, October 2018
- Yanagi, Nagato; Goto, Takuya; Miyazawa, Junichi
- Journal of Fusion Energy, Vol. 38, Issue 1