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Title: Accelerated Helium and Hydrogen Production in Fe-54 Doped Alloys - Measurements and Calculations for the FIST Experiment

Abstract

Helium and hydrogen measurements for F-82H alloys enriched up to 96% in 54Fe demonstrate accelerated gas production due to differences in the isotopic cross sections. The samples were irradiated in the JP-17 and JP-22 experiments in HFIR. Results are compared to calculations using isotopic helium production cross sections from ENDF/B-VI or the computer code, GNASH, for the radioactive isotope 55Fe. Helium measurements demonstrated an accelerated helium (appm)/dpa ratio of 2.3 after a 1.25-year irradiation, an increase of a factor of 4.3 over natural iron, due to higher helium production cross sections for 54Fe and 55Fe. Alloys doped with 55Fe could achieve helium/dpa ratios up to about 20, well above the fusion reactor ratio of 10. Calculations predict that hydrogen production is accelerated by about a factor of 13 over natural iron. However, measurements show that most of this hydrogen is not retained in the samples.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
984282
Report Number(s):
PNNL-SA-31873
AT6020100; TRN: US201015%%937
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Book
Resource Relation:
Related Information: Fusion Materials: Semi-Annual Progress Report Ending December 31, 1999, 27:236
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; ALLOYS; COMPUTER CODES; CROSS SECTIONS; HELIUM; HYDROGEN; HYDROGEN PRODUCTION; IRON; IRRADIATION; PRODUCTION; THERMONUCLEAR REACTORS

Citation Formats

Greenwood, Lawrence R., Oliver, Brian M., Ohnuki, S., Shiba, K., Kohno, Y., Kohyama, A., Robertson, J. P., Meadows, J. W., and Gelles, David S. Accelerated Helium and Hydrogen Production in Fe-54 Doped Alloys - Measurements and Calculations for the FIST Experiment. United States: N. p., 2000. Web.
Greenwood, Lawrence R., Oliver, Brian M., Ohnuki, S., Shiba, K., Kohno, Y., Kohyama, A., Robertson, J. P., Meadows, J. W., & Gelles, David S. Accelerated Helium and Hydrogen Production in Fe-54 Doped Alloys - Measurements and Calculations for the FIST Experiment. United States.
Greenwood, Lawrence R., Oliver, Brian M., Ohnuki, S., Shiba, K., Kohno, Y., Kohyama, A., Robertson, J. P., Meadows, J. W., and Gelles, David S. Fri . "Accelerated Helium and Hydrogen Production in Fe-54 Doped Alloys - Measurements and Calculations for the FIST Experiment". United States. https://www.osti.gov/servlets/purl/984282.
@article{osti_984282,
title = {Accelerated Helium and Hydrogen Production in Fe-54 Doped Alloys - Measurements and Calculations for the FIST Experiment},
author = {Greenwood, Lawrence R. and Oliver, Brian M. and Ohnuki, S. and Shiba, K. and Kohno, Y. and Kohyama, A. and Robertson, J. P. and Meadows, J. W. and Gelles, David S.},
abstractNote = {Helium and hydrogen measurements for F-82H alloys enriched up to 96% in 54Fe demonstrate accelerated gas production due to differences in the isotopic cross sections. The samples were irradiated in the JP-17 and JP-22 experiments in HFIR. Results are compared to calculations using isotopic helium production cross sections from ENDF/B-VI or the computer code, GNASH, for the radioactive isotope 55Fe. Helium measurements demonstrated an accelerated helium (appm)/dpa ratio of 2.3 after a 1.25-year irradiation, an increase of a factor of 4.3 over natural iron, due to higher helium production cross sections for 54Fe and 55Fe. Alloys doped with 55Fe could achieve helium/dpa ratios up to about 20, well above the fusion reactor ratio of 10. Calculations predict that hydrogen production is accelerated by about a factor of 13 over natural iron. However, measurements show that most of this hydrogen is not retained in the samples.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {9}
}

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