A non destructive technique based on gamma spectrometry and application of the Monte Carlo method for detector efficiency calibration, was used to assay radioactive content waste drums. Exploranium GR-130 miniSPEC portable gamma ray spectrometer was used to externally monitor radioactive waste drums containing ion exchange resin waste from the water demineralization system of GRR-1 open pool-ty...

In this paper, we consider a drift-diffusion system describing the corrosion of an iron based alloy in a nuclear waste repository. In comparison with the classical drift-diffusion system arising in the modeling of semiconductor devices, the originality of the corrosion model lies in the boundary conditions which are of Robin type and induce an additional coupling between the equations. We prove...

During the last decades of nanoparticles research, many nanomaterials have been developed for applications in the field of bio-labelling. For the visualization of transport processes in the body, organs and cells, luminescent quantum dots (QDs) make for highly useful diagnostic tools. However, intercellular routes, bio-distribution, metabolism during degradation or quantification of the excreti...

The gradual growth of the use of radionuclides in nuclear medicine, since the decade of 70, and the consequent increase of liquid radioactive discharges for the urban sewer network, brought the necessity of revise the current maximum values for release of radioactive material in sewage systems, and to develop regulation to ensure the protection of man and the environment. According to the IAEAI...

The NRC is issuing this regulatory issue summary (RIS) to inform recipients of the status of the agency’s efforts to implement the requirements of Section 651(e) of the Energy Policy Act of 2005 (EPAct) on “Treatment of Accelerator-Produced and Other Radioactive Material as Byproduct Material.” This RIS updates the information contained in RIS 2007-22, “Status Update for Implementation of NRC R...

In this paper, we consider a drift-diffusion system describing the corrosion of an iron based alloy in a nuclear waste repository. In comparison with the classical driftdiffusion system arising in the modeling of semiconductor devices, the originality of the corrosion model lies in the boundary conditions which are of Robin type and induce an additional coupling between the equations. We prove ...

The aim of this report is to extend understanding and capability for linking atomistic understanding of glass corrosion mechanisms to continuum models of reaction and transport in the subsurface environment. The focus of this report is on aluminosilicate glass dissolution supported by studies on natural aluminosilicate minerals which exhibit similar corrosion properties. The ultimate objectives...

In this paper, we consider a drift-diffusion system describing the corrosion of an iron based alloy in a nuclear waste repository. In comparison with the classical driftdiffusion system arising in the modeling of semiconductor devices, the originality of the corrosion model lies in the boundary conditions which are of Robin type and induce an additional coupling between the equations. We prove ...

A 2-D model for the corrosion of spent nuclear fuel inside a failed nuclear waste container has been modified to determine the influence of various redox processes occurring within fractures in the fuel. The corrosion process is driven by reaction of the fuel with the dominant α radiolysis product, H2O2. A number of reactions are shown to moderate or suppress the corrosion rate, including H2O2 ...