Nuclear Graphite
Sensitivity of Irradiation-induced Stress in Nuclear Graphite to Material Data
... in nuclear graphite to various types of material data changes is ...of nuclear graphite include irradiation-induced size effect, elastic modulus, coefficient of thermal expansion (CTE) and ...
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A time-dependent atomistic reconstruction of severe irradiation damage and associated property changes in nuclear graphite
... Controlled nuclear fission has always been intimately linked to graphite, from the first nuclear piles in the 1940s, through the first civil nuclear reactor, Calder Hall, which opened in 1956, ...
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Measurements of Stress Concentration Behaviour in AGR Nuclear Graphite
... Blunt stress raisers were simulated by wire-eroding (for minimal mechanical damage) keyhole notches with tip diameters of 2 and 4 mm in test specimens of Graftech (formerly UCAR) manufactured IM1-24 Gilsocarbon (moulded ...
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Thermal annealing of nuclear graphite during in-situ electron irradiation
... UK’s nuclear reactors are graphite -moderated Advanced Gas-Cooled Reactors (AGRs) which operate at temperatures around 625 K in order to reduce the degree of net irradiation damage through continuous ...
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Computational Modelling of Unstable Crack Propagation in Nuclear Graphite
... The resulting system of equations is highly nonlinear and requires a solution strategy that can trace the entire transient response. The application of this work is the predictive modelling of crack propagation in ...
8
Experimental study on oxidation of nuclear graphite for HTGR
... the nuclear graphite will be oxidized while being used as moderator, reflector and structural ...coolant, graphite will be inevitably oxidized at temperature higher than 400ºC, and the oxidation will ...
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The Relationship between Stresses and Dimensional Changes in Nuclear Graphite Moderator Bricks under Irradiation
... A finite element stress analysis for a hypothetical nuclear graphite moderator brick has been carried out, considering dimensional and other property changes due to fast neutron irradiation. The stresses ...
9
Criciform Biaxial Testing of Polygranular Nuclear Graphite
... Gilsocarbon graphite is used as the neutron moderator in the advanced gas-cooled reactors (AGRs) in the ...near-isotropic nuclear-grade graphite is a candidate material for the nuclear ...
9
A study of the porosity of nuclear graphite using small angle neutron scattering
... tive formulations of this equation, arising from rather differ- ent assumptions about the interplay between surface and mass fractals [15,16]. However, the main value of the fractal picture is that it provides precise ...
8
Electron irradiation of nuclear graphite studied by transmission electron microscopy and electron energy loss spectroscopy
... Four areas of thin (<50 nm) PGA graphite were subjected to an average electron fluence of 4.2 x 10 18 electrons cm -2 s -1 (2.4 x10 -4 dpa s -1 ). Images of the basal planes and electron energy loss spectra ...
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Electron microscopy of nuclear graphite: A modelling approach
... of graphite causes various structural and property changes, including for example Young’s modulus and the thermal resistivity ...of Nuclear Graphite’ has been established, involving the authors of ...
5
Characterisation of the Deformation and Fracture of Nuclear Graphite using Neutron Diffraction
... for nuclear graphite prior to failure, and a corresponding relaxation of lattice strain due to removal of local constraints (Hodgkins et ...Gilsocarbon graphite under bending using a time of flight ...
8
On the nature of cracks and voids in nuclear graphite
... non-irradiated nuclear graphite and HOPG has been undertaken by Wen et ...(PGA) nuclear graphite; a fine structure of smaller cracks was also observed with crack lengths down to ...
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Site-bond Lattice Modelling of Damage Process in Nuclear Graphite under Bending
... for graphite (Morrison et al 2014a, Morrison et al 2014b) and cement-paste (Zhang et al 2014a) represented the bonds with spring bundles, where each spring resisted separate translational degree of ...
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Probability Finite Element Assessment Method for Nuclear Graphite Components (M096)
... of graphite components in ...in graphite components such as the coefficient of thermal conductivity, the coefficient of thermal expansion, the creep coefficient, the elastic modulus, and the ...the ...
6
Regulatory approach to the challenge of AGR graphite core ageing
... to graphite weight loss it was necessary to account for the volume change attributable to irradiation induced dimensional ...at Nuclear Graphite Research Group (NGRG) based at the University of ...
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BIAXIAL TESTING FOR NUCLEAR GRADE GRAPHITE BY BALL ON THREE BALLS ASSESSMENT
... (high-purity) graphite for fuel element and moderator material in Advanced Gas Cooling Reactors (AGR) displays large scatter in strength and a non-linear stress-strain response from the damage ...core ...
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Graphite immobilisation in glass composite materials
... hexagonal graphite that closely matches the ideal hexagonal graphite ...of graphite, reacts with the impurities (neutron absorbing elements ...the graphite and in order to remove the residual ...
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Effects of Porosity and Temperature on Oxidation Behavior in Air of Selected Nuclear Graphites
... of nuclear graphite is important when considering reactor ...different graphite brands has been studied by Thermo Gravimetric Analysis (TGA) method, and Arrhenius plot has been applied to calculate ...
5
AN INTRINSIC MODEL FOR GRAPHITE OXIDATION AND THE EFFECTS OF MICROSTRUCTURAL FEATURES ON APPARENT RATE
... based nuclear graphites (IG-110, NBG-18, and PCEA) that are of interest to the next generation nuclear plant ...of nuclear graphite such as the filler particles, microcracks, binder phase, ...
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