Effects of High-Temperature Irradiation on the Microstructure of Nuclear Graphite

Anne A. Campbell; Cristian I. Contescu; Ercan Cakmak; Nidia C. Gallego; Timothy D. Burchell

doi:10.2172/1615810

Effects of High-Temperature Irradiation on the Microstructure of Nuclear Graphite

Anne A. Campbell
, Cristian I. Contescu
, Ercan Cakmak
, Nidia C. Gallego
, Timothy D. Burchell

Research output: Other contribution › Technical Report

Abstract

This report summarizes the nondestructive microstructure characterization undertaken at Oak Ridge National Laboratory (ORNL) to understand the effects of high-temperature neutron irradiation on the structure of nuclear graphite. Nuclear graphite specimens were irradiated in the ORNL High Flux Isotope Reactor (HFIR) in the High Temperature Vehicle (HTV) with target irradiation temperatures of 900ºC, 1200ºC, and 1500ºC [1, 2]. The experiment was irradiated in the HFIR flux trap for two irradiation cycles, providing the specimens in the highest-fluence positions a total exposure of 4.5×10²¹ n/cm² [E>0.1 MeV], equivalent to radiation damage of ~3.3 dpa (displacements per atom) according to the conversion factor in Burchell [3].

Original language	English
Place of Publication	United States
DOIs	https://doi.org/10.2172/1615810
State	Published - 2019

Keywords

36 MATERIALS SCIENCE

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10.2172/1615810

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title = "Effects of High-Temperature Irradiation on the Microstructure of Nuclear Graphite",

abstract = "This report summarizes the nondestructive microstructure characterization undertaken at Oak Ridge National Laboratory (ORNL) to understand the effects of high-temperature neutron irradiation on the structure of nuclear graphite. Nuclear graphite specimens were irradiated in the ORNL High Flux Isotope Reactor (HFIR) in the High Temperature Vehicle (HTV) with target irradiation temperatures of 900ºC, 1200ºC, and 1500ºC [1, 2]. The experiment was irradiated in the HFIR flux trap for two irradiation cycles, providing the specimens in the highest-fluence positions a total exposure of 4.5×1021 n/cm2 [E>0.1 MeV], equivalent to radiation damage of \textasciitilde{}3.3 dpa (displacements per atom) according to the conversion factor in Burchell [3].",

keywords = "36 MATERIALS SCIENCE",

author = "Campbell, \{Anne A.\} and Contescu, \{Cristian I.\} and Ercan Cakmak and Gallego, \{Nidia C.\} and Burchell, \{Timothy D.\}",

year = "2019",

doi = "10.2172/1615810",

language = "English",

type = "Other",

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T1 - Effects of High-Temperature Irradiation on the Microstructure of Nuclear Graphite

AU - Campbell, Anne A.

AU - Contescu, Cristian I.

AU - Cakmak, Ercan

AU - Gallego, Nidia C.

AU - Burchell, Timothy D.

PY - 2019

Y1 - 2019

N2 - This report summarizes the nondestructive microstructure characterization undertaken at Oak Ridge National Laboratory (ORNL) to understand the effects of high-temperature neutron irradiation on the structure of nuclear graphite. Nuclear graphite specimens were irradiated in the ORNL High Flux Isotope Reactor (HFIR) in the High Temperature Vehicle (HTV) with target irradiation temperatures of 900ºC, 1200ºC, and 1500ºC [1, 2]. The experiment was irradiated in the HFIR flux trap for two irradiation cycles, providing the specimens in the highest-fluence positions a total exposure of 4.5×1021 n/cm2 [E>0.1 MeV], equivalent to radiation damage of ~3.3 dpa (displacements per atom) according to the conversion factor in Burchell [3].

AB - This report summarizes the nondestructive microstructure characterization undertaken at Oak Ridge National Laboratory (ORNL) to understand the effects of high-temperature neutron irradiation on the structure of nuclear graphite. Nuclear graphite specimens were irradiated in the ORNL High Flux Isotope Reactor (HFIR) in the High Temperature Vehicle (HTV) with target irradiation temperatures of 900ºC, 1200ºC, and 1500ºC [1, 2]. The experiment was irradiated in the HFIR flux trap for two irradiation cycles, providing the specimens in the highest-fluence positions a total exposure of 4.5×1021 n/cm2 [E>0.1 MeV], equivalent to radiation damage of ~3.3 dpa (displacements per atom) according to the conversion factor in Burchell [3].

KW - 36 MATERIALS SCIENCE

U2 - 10.2172/1615810

DO - 10.2172/1615810

M3 - Technical Report

CY - United States

ER -

Effects of High-Temperature Irradiation on the Microstructure of Nuclear Graphite

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