SEM and EPMA analysis of un-usual hydride structure in in-pile cracked Zircaloy-cladding
نویسندگان
چکیده
The hydride distribution in a cracked Zircaloy cladding tube has been investigated by neutron radiography, Scanning Electron Microscopy (SEM) and Hydrogen measurements. The crack occurred during handling in the spent fuel pool. Back Scattered Electron images showed some unexpected contrasts in zones with high hydrogen concentrations near cracks. This phase has been studied by SEM and EPMA. After detailed analysis it was possible to relate the observed structure to an unexpected hydride distribution in the material.
منابع مشابه
Use of Secondary Ions Mass Spectrometry (SIMS) for Cladding Materials Post- Irradiation Examination (PIE)
Zirconium-based alloys are widely used in the field of nuclear industry as cladding for nuclear fuel in power plants. In a pressurized water reactor (PWR), boric acid is added in the coolant for reactivity control. Lithium hydroxide is added to render the coolant slightly alkaline, which helps to inhibit corrosion product deposition on the fuel cladding and reduces the corrosion rate of structu...
متن کاملSimple Pile-Soil Interaction Effect on Seismic Response of Fixed Offshore Platforms
In this paper effect of pile-soil consideration in obtaining seismic response offshore structure is assessed due to earthquake loading. InducedSeismic force is one of the most important excitations for the dynamic response of an offshore structure. According to API, Seismic forces should be accounted in platform design for seismically active regions in order to determine the allowable seismic r...
متن کاملThermophysical and Mechanical Analyses of UO2-36.4vol % BeO Fuel Pellets with Zircaloy, SiC, and FeCrAl Claddings
The thermophysical performance and solid mechanics behavior of UO2-36.4vol % BeO fuel pellets cladded with Zircaloy, SiC, and FeCrAl, and Zircaloy cladding materials coated with SiC and FeCrAl, are investigated based on simulation results obtained by the CAMPUS code. In addition, the effect of coating thickness (0.5, 1 and 1.5 mm) on fuel performance and mechanical interaction is discussed. The...
متن کاملApplication of Neutron Radiography and Neutron Diffraction Techniques in Study of Zirconium Hydride Blisters in Zirconium Based Pressure Tube Materials
A programme of examining hydride blisters created in the laboratory on zircaloy pressure tubes and that in the irradiated pressure tube from one of the PHWR , which was suspected to have developed hydride blisters, was undertaken using neutron radiography. It was observed that a zirconium hydride blister of nearly 0.35% of job thickness could be detected using neutron radiography. This work ser...
متن کاملWAPD-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...
متن کامل