Showing papers by "Gary S. Was published in 2009"
TL;DR: In this article, the authors focus on the materials challenges that will determine the feasibility of these advanced concepts and define the long-term future of nuclear power, and present a detailed discussion of these materials challenges.
Abstract: Nuclear energy holds the promise to provide vast amounts of reliable baseline electricity at commercially competitive costs with modest environmental impact. However, the future of nuclear energy lies beyond the current generation of light water reactors. Future reactors will be expected to provide additional improvements in safety, maintain high reliability, use uranium resources more efficiently, and produce lower volumes of less toxic solid wastes. Several advanced reactor concepts are under development to meet these demands. In most cases, these designs translate into higher operating temperatures and longer lifetimes, more corrosive environments, and higher radiation fields in which materials must reliably perform. This issue focuses on the materials challenges that will determine the feasibility of these advanced concepts and define the long-term future of nuclear power.
137 citations
TL;DR: In this article, the influence of a high fraction of special grain boundaries on the intergranular stress corrosion cracking susceptibility of 316L stainless steel and nickel base alloy 690 in supercritical water was evaluated.
84 citations
TL;DR: In this article, the role of irradiation and temperature on stress corrosion cracking in supercritical water was investigated and it was found that the severity of cracking correlated with both the hardness and the grain boundary chromium concentration.
46 citations
TL;DR: In this article, the authors showed that the effectiveness of the solute additions disappeared above 3 dpa at 400 °C and above 1 dPA at 500 °C after proton irradiations for up to 3D at 400°C and 1D at 500°C.
39 citations
TL;DR: The radiation-induced microstructure, strain localization, and iodine-induced stress corrosion cracking (I-SCC) behavior of recrystallized Zircaloy-4 proton-irradiated to 2-dpa at 305-°C was examined in this paper.
34 citations
TL;DR: A series of constant extension rate tensile (CERT) tests at a strain rate of 3 × 10−7−s−1 were conducted in supercritical water over a temperature range of 400 − 600 −C and pressure 24.8 − 0.07 −MPa.
34 citations
TL;DR: In this paper, the effects of a solute-vacancy trapping mechanism on radiation-induced segregation in austenitic stainless steels were analyzed and the binding energies of oversized solutes of Pt, Ti, Hf and Zr were calculated from ab initio first principles.
23 citations
TL;DR: An experimental facility was constructed to study the corrosion of alloys in helium containing part per million (ppm) levels of CO, CO2,C H4 and H2 as impurities, relevant to the environment in the heat exchanger of the Very High Temperature Gas Cooled Reactor as discussed by the authors.
Abstract: An experimental facility was constructed to study the corrosion of alloys in helium containing part per million (ppm) levels of CO, CO2 ,C H4 and H2 as impurities, relevant to the environment in the heat exchanger of the Very High Temperature Gas Cooled Reactor. The system provides the capability of exposing multiple specimens in up to seven separate helium environments, simultaneously, for durations of >1000 h and temperatures up to 1200 ◦ C. Impurity concentrations are controlled down to 1 ppm accuracy and analyzed using a discharge ionization detector gas chromatograph. The utility and reliability of the facility in quantitatively accounting for the masses of reactants and products involved in the oxidation of alloy 617 at 900 ◦ C and 1000 ◦ C in the helium gas containing 15 ppm CO and 1.5 ppm CO2 is confirmed by the weight-gain measurements, gas-phase analysis and post-test microstructural analysis.
6 citations
TL;DR: Extended abstract of a paper presented at Microscopy and Microanalysis 2009 in Richmond, Virginia, USA, July 26 - July 30, 2009 as mentioned in this paper, is presented in this paper.
Abstract: Extended abstract of a paper presented at Microscopy and Microanalysis 2009 in Richmond, Virginia, USA, July 26 – July 30, 2009