Microstructural aspects of Zircaloy nodular corrosion in steam

Fractographic Aspects of Stress Corrosion Failure of Zircaloy 2 in CH3OH HCL Solutions

Fracture surface of Zircaloy-2 specimens tested under constant crosshead speed in CH3OH/0.4 Vol. %HCI solution with and without selenium (25 ppm) addition was studied. Using a combined process of deformation and annealing, coarse grained material was also obtained and examined. Two modes of stress corrosion crack propagation were observed: an intergranular zone caused by stress assisted anodic ...

Microstructural white matter abnormalities in nodular heterotopia with overlying polymicrogyria

Nodular heterotopia (NH) with overlying polymicrogyria can result in medically uncontrolled seizures. Most patients also exhibit deficits of function related to the location of the abnormal cortex. However, functional imaging studies show that the abnormal cortex can retain some function, making surgical planning difficult. It is not known if the connectivity of the abnormal cortex is normal. I...

WAPD-T-3173, " The Corrosion of Zircaloy-Clad Fuel Assemblies in a Geologic Repository Environment."

Recently analyzed long-term Zircaloy autoclave corrosion data were used to develop new Zircaloy corrosion correlations. Calculations were performed to estimate the additional quantity of corrosion that may be experienced by spent Zircaloy-c1ad fuel assemblies from long-term exposure to geologic repository conditions. These estimates indicate that the level of general corrosion is very small and...

The Role of Cathodic Poisons on the Stress Corrosion Cracking of Zircaloy- 2 in Methanolic Solution Containing 0.4vol.% Hydrochloric Acid

How Steam System Chemistry and Control Affect Steam Side Coil Corrosion

Ferric oxide, hematite, "red rust" , it has a lot of names but there is no argument that it is undesirable. It is a loosely adhering oxide layer which has poor heat transfer capabilities. It also tends to deposit elsewhere in the system. It can deposit in the coil, in steam traps and piping downstream, and can eventually reach the boiler. In the boiler it can form further deposits, which in tur...