IRRADIATION CREEP IN GRAPHITE | Zendy

G.K. Williamson | Zendy; G.M. Jenkins | Zendy

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IRRADIATION CREEP IN GRAPHITE

Author(s) -

G.K. Williamson,

G.M. Jenkins

Publication year - 1964

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/4639694

Subject(s) - creep , microstructure , irradiation , materials science , graphite , transmission electron microscopy , ultimate tensile strength , crystal (programming language) , composite material , crystallography , nanotechnology , chemistry , nuclear physics , computer science , physics , programming language

An understanding of the underlying mechanisms of irradiation creep in graphite material is required to correctly interpret experimental data, explain micromechanical modeling results, and predict whole-core behavior. This project will focus on experimental microscopic data to demonstrate the mechanism of irradiation creep. High-resolution transmission electron microscopy should be able to image both the dislocations in graphite and the irradiation-induced interstitial clusters that pin those dislocations. The team will first prepare and characterize nanoscale samples of virgin nuclear graphite in a transmission electron microscope. Additional samples will be irradiated to varying degrees at the Advanced Test Reactor (ATR) facility and similarly characterized. Researchers will record microstructures and crystal defects and suggest a mechanism for irradiation creep based on the results. In addition, the purchase of a tensile holder for a transmission electron microscope will allow, for the first time, in situ observation of creep behavior on the microstructure and crystallographic defects.

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