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Title: Standardization of accelerator irradiation procedures for simulation of neutron induced damage in reactor structural materials

Abstract

Self-ion irradiation is widely used as a method to simulate neutron damage in reactor structural materials. Accelerator-based simulation of void swelling, however, introduces a number of neutron-atypical features which require careful data extraction and in some cases introduction of innovative irradiation techniques to alleviate these issues. We briefly summarize three such atypical features: defect imbalance effects, pulsed beam effects, and carbon contamination. The latter issue has just been recently recognized as being relevant to simulation of void swelling and is discussed here in greater detail. It is shown that carbon ions are entrained in the ion beam by Coulomb force drag and accelerated toward the target surface. Beam-contaminant interactions are modeled using molecular dynamics simulation. By applying a multiple beam deflection technique, carbon and other contaminants can be effectively filtered out, as demonstrated in an irradiation of HT-9 alloy by 3.5 MeV Fe ions.

Authors:
ORCiD logo; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
1415698
Report Number(s):
PNNL-SA-126514
Journal ID: ISSN 0168-583X; 49582; AF5810000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms; Journal Volume: 409; Journal Issue: C
Country of Publication:
United States
Language:
English
Subject:
Self-ion Irradiation; Standardization; Neutron Irradiation; Radiation Resistance; Environmental Molecular Sciences Laboratory

Citation Formats

Shao, Lin, Gigax, Jonathan, Chen, Di, Kim, Hyosim, Garner, Frank A., Wang, Jing, and Toloczko, Mychailo B.. Standardization of accelerator irradiation procedures for simulation of neutron induced damage in reactor structural materials. United States: N. p., 2017. Web. doi:10.1016/j.nimb.2017.05.026.
Shao, Lin, Gigax, Jonathan, Chen, Di, Kim, Hyosim, Garner, Frank A., Wang, Jing, & Toloczko, Mychailo B.. Standardization of accelerator irradiation procedures for simulation of neutron induced damage in reactor structural materials. United States. doi:10.1016/j.nimb.2017.05.026.
Shao, Lin, Gigax, Jonathan, Chen, Di, Kim, Hyosim, Garner, Frank A., Wang, Jing, and Toloczko, Mychailo B.. Sun . "Standardization of accelerator irradiation procedures for simulation of neutron induced damage in reactor structural materials". United States. doi:10.1016/j.nimb.2017.05.026.
@article{osti_1415698,
title = {Standardization of accelerator irradiation procedures for simulation of neutron induced damage in reactor structural materials},
author = {Shao, Lin and Gigax, Jonathan and Chen, Di and Kim, Hyosim and Garner, Frank A. and Wang, Jing and Toloczko, Mychailo B.},
abstractNote = {Self-ion irradiation is widely used as a method to simulate neutron damage in reactor structural materials. Accelerator-based simulation of void swelling, however, introduces a number of neutron-atypical features which require careful data extraction and in some cases introduction of innovative irradiation techniques to alleviate these issues. We briefly summarize three such atypical features: defect imbalance effects, pulsed beam effects, and carbon contamination. The latter issue has just been recently recognized as being relevant to simulation of void swelling and is discussed here in greater detail. It is shown that carbon ions are entrained in the ion beam by Coulomb force drag and accelerated toward the target surface. Beam-contaminant interactions are modeled using molecular dynamics simulation. By applying a multiple beam deflection technique, carbon and other contaminants can be effectively filtered out, as demonstrated in an irradiation of HT-9 alloy by 3.5 MeV Fe ions.},
doi = {10.1016/j.nimb.2017.05.026},
journal = {Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms},
number = C,
volume = 409,
place = {United States},
year = {Sun Oct 01 00:00:00 EDT 2017},
month = {Sun Oct 01 00:00:00 EDT 2017}
}