Measurements of the hydrogenic recombination coefficient for the TFTR vacuum vessel [electronic resource].
- Published:
- Princeton, N.J. : Princeton University, 1983.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description:
- Pages: 22 : digital, PDF file
- Additional Creators:
- Princeton University and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access:
- Free-to-read Unrestricted online access
- Summary:
- Characteristic values of the recombination rate coefficient for hydrogen and deuterium in stainless steel have been measured for the inner wall of the TFTR vacuum vessel for vessel temperatures of 25 to 100 C. In situ measurements of k/sub r/ are important for predicting the hydrogen isotope retention in the wall as a function of time, temperature, and discharge exposure, particularly because existing laboratory measurements of k/sub r/ for stainless steel span a range of four orders of magnitude. The measurement technique involved the observation of the decrease in hydrogen pressure during a glow discharge in the TFTR vacuum vessel with an initial static gas fill. The resulting values of k/sub r/ at 25 C are in the range of (0.4 to 4) x 10/sup -27/cm/sup 4/-s/sup -1/ assuming a value of the hydrogenic diffusivity of 2 x 10/sup -12/cm/sup 2/-s/sup -1/ at room temperature. No significant isotopic dependence was observed and the temperature dependence of k/sub r/ is consistent with the literature value (0.5 eV) of the activation energy. The implications of this range of values of k/sub r/, for the estimation of the in-vessel tritium inventory following D-T operation in TFTR are discussed.
- Report Numbers:
- E 1.99:pppl-2046
E 1.99: conf-830795-7
conf-830795-7
pppl-2046 - Subject(s):
- Other Subject(s):
- Deuterium
- Recombination
- First Wall
- Trapping
- Hydrogen
- Glow Discharges
- Inventories
- Stainless Steels
- Tftr Reactors
- Tritium
- Alloys
- Beta Decay Radioisotopes
- Beta-Minus Decay Radioisotopes
- Chromium Alloys
- Corrosion Resistant Alloys
- Electric Discharges
- Elements
- Hydrogen Isotopes
- Iron Alloys
- Iron Base Alloys
- Isotopes
- Light Nuclei
- Nonmetals
- Nuclei
- Odd-Even Nuclei
- Odd-Odd Nuclei
- Radioisotopes
- Stable Isotopes
- Steels
- Thermonuclear Reactor Walls
- Thermonuclear Reactors
- Tokamak Type Reactors
- Years Living Radioisotopes
- Note:
- Published through SciTech Connect.
12/01/1983.
"pppl-2046"
" conf-830795-7"
"DE84004296"
Symposium on energy removal and particle control and toroidal fusion devices, Princeton, NJ, USA, 26 Jul 1983.
Dylla, H.F.; Cecchi, J.L.; Knize, R.J. - Funding Information:
- AC02-76CH03073
View MARC record | catkey: 14754780