A synchrotron X-ray study on the wigner effect of the irradiated nuclear-grade graphite

Chung-Kai Chang; Shuo-Cheng Tsai; Ji-Jung Kai; Chin-Pin Chuang; E-Wen Huang

doi:10.1016/j.proeng.2012.03.003

A synchrotron X-ray study on the wigner effect of the irradiated nuclear-grade graphite

Chung-Kai Chang
, Shuo-Cheng Tsai
, Ji-Jung Kai
, Chin-Pin Chuang
, E-Wen Huang

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

3 Citations (Scopus)

41 Downloads (CityUHK Scholars)

Abstract

We simulate the Wigner Effect of the nuclear-grade graphite for the High Temperature Gas-cooled Reactor (HTGR) operation environment. The graphite was artificially irradiated with 3MeV C²⁺ ion to mimic the fast neutron-radiation damage of the HTGR core environment. In a high vacuum environment of 10^-7 torr, the irradiation temperatures were controlled in the range of 600°C to 900°C. Due to the high-dosages radiation, enormous amounts of Frenkel pairs are created, and these defects induce the swelling of lattice spacing. Those vacancies and interstitials form new strain fields and store energy in the distorted crystalline structure. We quantify the structural integrity of the graphite with/without irradiation via synchrotron X-ray diffraction experiments. The synchrotron X-ray diffraction experimental results, gauged from bulk specimens, reveal the texture reorientation and microstructure development subjected to the combination of the irradiation and high temperature effects. A correlation between lattice strain and irradiation effect is developed. The deformation mechanisms are revealed. © 2012 Published by Elsevier Ltd.

Original language	English
Pages (from-to)	7-12
Journal	Procedia Engineering
Volume	36
DOIs	https://doi.org/10.1016/j.proeng.2012.03.003
Publication status	Published - 2012
Externally published	Yes
Event	2011 IUMRS International Conference in Asia, ICA 2011 - Taipei, Taiwan, China Duration: 19 Sept 2011 → 22 Sept 2011

Research Keywords

HTGR
Ion-irradiation
X-ray diffraction

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This full text is made available under CC-BY-NC-ND 3.0. https://creativecommons.org/licenses/by-nc-nd/3.0/

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title = "A synchrotron X-ray study on the wigner effect of the irradiated nuclear-grade graphite",

abstract = "We simulate the Wigner Effect of the nuclear-grade graphite for the High Temperature Gas-cooled Reactor (HTGR) operation environment. The graphite was artificially irradiated with 3MeV C2+ ion to mimic the fast neutron-radiation damage of the HTGR core environment. In a high vacuum environment of 10-7 torr, the irradiation temperatures were controlled in the range of 600°C to 900°C. Due to the high-dosages radiation, enormous amounts of Frenkel pairs are created, and these defects induce the swelling of lattice spacing. Those vacancies and interstitials form new strain fields and store energy in the distorted crystalline structure. We quantify the structural integrity of the graphite with/without irradiation via synchrotron X-ray diffraction experiments. The synchrotron X-ray diffraction experimental results, gauged from bulk specimens, reveal the texture reorientation and microstructure development subjected to the combination of the irradiation and high temperature effects. A correlation between lattice strain and irradiation effect is developed. The deformation mechanisms are revealed. {\textcopyright} 2012 Published by Elsevier Ltd.",

keywords = "HTGR, Ion-irradiation, X-ray diffraction",

author = "Chung-Kai Chang and Shuo-Cheng Tsai and Ji-Jung Kai and Chin-Pin Chuang and E-Wen Huang",

year = "2012",

doi = "10.1016/j.proeng.2012.03.003",

language = "English",

volume = "36",

pages = "7--12",

journal = "Procedia Engineering",

issn = "1877-7058",

publisher = "Elsevier B.V.",

note = "2011 IUMRS International Conference in Asia, ICA 2011 ; Conference date: 19-09-2011 Through 22-09-2011",

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TY - JOUR

T1 - A synchrotron X-ray study on the wigner effect of the irradiated nuclear-grade graphite

AU - Chang, Chung-Kai

AU - Tsai, Shuo-Cheng

AU - Kai, Ji-Jung

AU - Chuang, Chin-Pin

AU - Huang, E-Wen

PY - 2012

Y1 - 2012

N2 - We simulate the Wigner Effect of the nuclear-grade graphite for the High Temperature Gas-cooled Reactor (HTGR) operation environment. The graphite was artificially irradiated with 3MeV C2+ ion to mimic the fast neutron-radiation damage of the HTGR core environment. In a high vacuum environment of 10-7 torr, the irradiation temperatures were controlled in the range of 600°C to 900°C. Due to the high-dosages radiation, enormous amounts of Frenkel pairs are created, and these defects induce the swelling of lattice spacing. Those vacancies and interstitials form new strain fields and store energy in the distorted crystalline structure. We quantify the structural integrity of the graphite with/without irradiation via synchrotron X-ray diffraction experiments. The synchrotron X-ray diffraction experimental results, gauged from bulk specimens, reveal the texture reorientation and microstructure development subjected to the combination of the irradiation and high temperature effects. A correlation between lattice strain and irradiation effect is developed. The deformation mechanisms are revealed. © 2012 Published by Elsevier Ltd.

AB - We simulate the Wigner Effect of the nuclear-grade graphite for the High Temperature Gas-cooled Reactor (HTGR) operation environment. The graphite was artificially irradiated with 3MeV C2+ ion to mimic the fast neutron-radiation damage of the HTGR core environment. In a high vacuum environment of 10-7 torr, the irradiation temperatures were controlled in the range of 600°C to 900°C. Due to the high-dosages radiation, enormous amounts of Frenkel pairs are created, and these defects induce the swelling of lattice spacing. Those vacancies and interstitials form new strain fields and store energy in the distorted crystalline structure. We quantify the structural integrity of the graphite with/without irradiation via synchrotron X-ray diffraction experiments. The synchrotron X-ray diffraction experimental results, gauged from bulk specimens, reveal the texture reorientation and microstructure development subjected to the combination of the irradiation and high temperature effects. A correlation between lattice strain and irradiation effect is developed. The deformation mechanisms are revealed. © 2012 Published by Elsevier Ltd.

KW - HTGR

KW - Ion-irradiation

KW - X-ray diffraction

UR - https://www.scopus.com/pages/publications/84892594073

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84892594073&origin=recordpage

U2 - 10.1016/j.proeng.2012.03.003

DO - 10.1016/j.proeng.2012.03.003

M3 - RGC 21 - Publication in refereed journal

SN - 1877-7058

VL - 36

SP - 7

EP - 12

JO - Procedia Engineering

JF - Procedia Engineering

T2 - 2011 IUMRS International Conference in Asia, ICA 2011

Y2 - 19 September 2011 through 22 September 2011

ER -

A synchrotron X-ray study on the wigner effect of the irradiated nuclear-grade graphite

Abstract

Research Keywords

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