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Title: Predicting neutron damage using TEM with in situ ion irradiation and computer modeling

Abstract

We have constructed a computer model of irradiation defect production closely coordinated with TEM and in situ ion irradiation of Molybdenum at 80 degrees C over a range of dose, dose rate and foil thickness. We have reexamined our previous ion irradiation data to assign appropriate error and uncertainty based on more recent work. The spatially dependent cascade cluster dynamics model is updated with recent Molecular Dynamics results for cascades in Mo. After a careful assignment of both ion and neutron irradiation dose values in dpa, TEM data are compared for both ion and neutron irradiated Mo from the same source material. Using the computer model of defect formation and evolution based on the in situ ion irradiation of thin foils, the defect microstructure, consisting of densities and sizes of dislocation loops, is predicted for neutron irradiation of bulk material at 80 degrees C and compared with experiment. Reasonable agreement between model prediction and experimental data demonstrates a promising direction in understanding and predicting neutron damage using a closely coordinated program of in situ ion irradiation experiment and computer simulation.

Authors:
 [1];  [1];  [2]; ORCiD logo [3]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Oregon State Univ., Corvallis, OR (United States)
  3. Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy; USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1481738
Alternate Identifier(s):
OSTI ID: 1549471
Grant/Contract Number:  
[AC02-06CH11357]
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
[ Journal Volume: 498; Journal Issue: C]; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; Computer modeling; In situ ion irradiation; Neutron irradiation; Predicted dislocation loop density and sizes; TEM

Citation Formats

Kirk, Marquis A., Li, Meimei, Xu, Donghua, and Wirth, Brian D. Predicting neutron damage using TEM with in situ ion irradiation and computer modeling. United States: N. p., 2017. Web. doi:10.1016/j.jnucmat.2017.10.023.
Kirk, Marquis A., Li, Meimei, Xu, Donghua, & Wirth, Brian D. Predicting neutron damage using TEM with in situ ion irradiation and computer modeling. United States. doi:10.1016/j.jnucmat.2017.10.023.
Kirk, Marquis A., Li, Meimei, Xu, Donghua, and Wirth, Brian D. Thu . "Predicting neutron damage using TEM with in situ ion irradiation and computer modeling". United States. doi:10.1016/j.jnucmat.2017.10.023. https://www.osti.gov/servlets/purl/1481738.
@article{osti_1481738,
title = {Predicting neutron damage using TEM with in situ ion irradiation and computer modeling},
author = {Kirk, Marquis A. and Li, Meimei and Xu, Donghua and Wirth, Brian D.},
abstractNote = {We have constructed a computer model of irradiation defect production closely coordinated with TEM and in situ ion irradiation of Molybdenum at 80 degrees C over a range of dose, dose rate and foil thickness. We have reexamined our previous ion irradiation data to assign appropriate error and uncertainty based on more recent work. The spatially dependent cascade cluster dynamics model is updated with recent Molecular Dynamics results for cascades in Mo. After a careful assignment of both ion and neutron irradiation dose values in dpa, TEM data are compared for both ion and neutron irradiated Mo from the same source material. Using the computer model of defect formation and evolution based on the in situ ion irradiation of thin foils, the defect microstructure, consisting of densities and sizes of dislocation loops, is predicted for neutron irradiation of bulk material at 80 degrees C and compared with experiment. Reasonable agreement between model prediction and experimental data demonstrates a promising direction in understanding and predicting neutron damage using a closely coordinated program of in situ ion irradiation experiment and computer simulation.},
doi = {10.1016/j.jnucmat.2017.10.023},
journal = {Journal of Nuclear Materials},
number = [C],
volume = [498],
place = {United States},
year = {2017},
month = {10}
}

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Cited by: 3 works
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