Thermophysical property and pore structure evolution in stressed and non-stressed neutron irradiated IG-110 nuclear graphite

L. L. Snead; C. I. Contescu; T. S. Byun; W. Porter

doi:10.1016/j.jnucmat.2016.04.042

Thermophysical property and pore structure evolution in stressed and non-stressed neutron irradiated IG-110 nuclear graphite

L. L. Snead, C. I. Contescu, T. S. Byun, W. Porter

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

The nuclear graphite, IG-110, was irradiated with and without a compressive load of 5 MPa at ∼400°C up to 9.3 × 10²⁵ n/m² (E > 0.1 MeV). Following irradiation physical properties were studied to compare the effect of graphite irradiation on microstructure developed under compression and in stress-free conditions. Properties included: dimensional change, thermal conductivity, dynamic modulus, and CTE. The effect of stress on open internal porosity was determined through nitrogen adsorption. The IG-110 graphite experienced irradiation-induced creep that is differentiated from irradiation-induced swelling. Irradiation under stress resulted in somewhat greater thermal conductivity and coefficient of thermal expansion. While a significant increase in dynamic modulus occurs, no differentiation between materials irradiated with and without compressive stress was observed. Nitrogen adsorption analysis suggests a difference in pore evolution in the 0.3-40 nm range for graphite irradiated with and without stress, but this evolution is seen to be a small contributor to the overall dimensional change.

Original language	English
Pages (from-to)	102-109
Number of pages	8
Journal	Journal of Nuclear Materials
Volume	476
DOIs	https://doi.org/10.1016/j.jnucmat.2016.04.042
State	Published - Aug 1 2016
Externally published	Yes

Funding

The authors would like to than Joel McDuffee and Bob Sitterson for their efforts in the design and construction of irradiation capsules. Irradiations were carried out in the High Flux Isotope Reactor, an user facility funded by the Office of Science, US Department of Energy . The work presented in this manuscript was supported in part by the Advanced Fuels Campaign of the Fuel Cycle R&D program in the Office of Nuclear Energy , and the Office of Fusion Energy Sciences US Department of Energy . The authors would like to than Mr. Mark Davies for assistance with the manuscript.

Funders	Funder number
Office of Fusion Energy Sciences US Department of Energy
U.S. Department of Energy
Office of Science
Office of Nuclear Energy

Keywords

Creep
Graphite
Neutron Irradiation

Access to Document

10.1016/j.jnucmat.2016.04.042

Cite this

@article{5a54266d507b4248b639f6cf60be8bd6,

title = "Thermophysical property and pore structure evolution in stressed and non-stressed neutron irradiated IG-110 nuclear graphite",

abstract = "The nuclear graphite, IG-110, was irradiated with and without a compressive load of 5 MPa at ∼400°C up to 9.3 × 1025 n/m2 (E > 0.1 MeV). Following irradiation physical properties were studied to compare the effect of graphite irradiation on microstructure developed under compression and in stress-free conditions. Properties included: dimensional change, thermal conductivity, dynamic modulus, and CTE. The effect of stress on open internal porosity was determined through nitrogen adsorption. The IG-110 graphite experienced irradiation-induced creep that is differentiated from irradiation-induced swelling. Irradiation under stress resulted in somewhat greater thermal conductivity and coefficient of thermal expansion. While a significant increase in dynamic modulus occurs, no differentiation between materials irradiated with and without compressive stress was observed. Nitrogen adsorption analysis suggests a difference in pore evolution in the 0.3-40 nm range for graphite irradiated with and without stress, but this evolution is seen to be a small contributor to the overall dimensional change.",

keywords = "Creep, Graphite, Neutron Irradiation",

author = "Snead, {L. L.} and Contescu, {C. I.} and Byun, {T. S.} and W. Porter",

year = "2016",

month = aug,

day = "1",

doi = "10.1016/j.jnucmat.2016.04.042",

language = "English",

volume = "476",

pages = "102--109",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier",

}

TY - JOUR

T1 - Thermophysical property and pore structure evolution in stressed and non-stressed neutron irradiated IG-110 nuclear graphite

AU - Snead, L. L.

AU - Contescu, C. I.

AU - Byun, T. S.

AU - Porter, W.

PY - 2016/8/1

Y1 - 2016/8/1

N2 - The nuclear graphite, IG-110, was irradiated with and without a compressive load of 5 MPa at ∼400°C up to 9.3 × 1025 n/m2 (E > 0.1 MeV). Following irradiation physical properties were studied to compare the effect of graphite irradiation on microstructure developed under compression and in stress-free conditions. Properties included: dimensional change, thermal conductivity, dynamic modulus, and CTE. The effect of stress on open internal porosity was determined through nitrogen adsorption. The IG-110 graphite experienced irradiation-induced creep that is differentiated from irradiation-induced swelling. Irradiation under stress resulted in somewhat greater thermal conductivity and coefficient of thermal expansion. While a significant increase in dynamic modulus occurs, no differentiation between materials irradiated with and without compressive stress was observed. Nitrogen adsorption analysis suggests a difference in pore evolution in the 0.3-40 nm range for graphite irradiated with and without stress, but this evolution is seen to be a small contributor to the overall dimensional change.

AB - The nuclear graphite, IG-110, was irradiated with and without a compressive load of 5 MPa at ∼400°C up to 9.3 × 1025 n/m2 (E > 0.1 MeV). Following irradiation physical properties were studied to compare the effect of graphite irradiation on microstructure developed under compression and in stress-free conditions. Properties included: dimensional change, thermal conductivity, dynamic modulus, and CTE. The effect of stress on open internal porosity was determined through nitrogen adsorption. The IG-110 graphite experienced irradiation-induced creep that is differentiated from irradiation-induced swelling. Irradiation under stress resulted in somewhat greater thermal conductivity and coefficient of thermal expansion. While a significant increase in dynamic modulus occurs, no differentiation between materials irradiated with and without compressive stress was observed. Nitrogen adsorption analysis suggests a difference in pore evolution in the 0.3-40 nm range for graphite irradiated with and without stress, but this evolution is seen to be a small contributor to the overall dimensional change.

KW - Creep

KW - Graphite

KW - Neutron Irradiation

UR - http://www.scopus.com/inward/record.url?scp=84964726531&partnerID=8YFLogxK

U2 - 10.1016/j.jnucmat.2016.04.042

DO - 10.1016/j.jnucmat.2016.04.042

M3 - Article

AN - SCOPUS:84964726531

SN - 0022-3115

VL - 476

SP - 102

EP - 109

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

ER -

Thermophysical property and pore structure evolution in stressed and non-stressed neutron irradiated IG-110 nuclear graphite

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this