An Advanced Cold Process Canister Design for Nuclear Waste Disposal

1990 ◽  
Vol 212 ◽  
Author(s):  
Heikki Raiko ◽  
Jukka-Pekka Salo
Keyword(s):  
Granular Material ◽  
Nuclear Waste ◽  
Waste Disposal ◽  
Quartz Sand ◽  
Pressure Vessels ◽  
Glass Beads ◽  
Load Bearing ◽  
Bearing Element ◽  
Leak Tightness ◽  
Heat Loads

ABSTRACTAn advanced cold process canister design, ACPC-design, is introduced in this paper. The cold process canister consists of a steel canister as a load bearing element, with an outer corrosion shield of copper, Fig. 1 - Fig. 4. The canister will be rilled with granular material, such as lead shots, glass beads or quartz sand.The conditions for the canister design are presented: dimensioning against radiation, allowed heat loads, strains, corrosion and leak tightness etc. The mechanical dimensioning of the copper/steel canister is made according to the Finnish standards (SFS) for pressure vessels.

scholarly journals Technetium-99m Transport and Immobilisation in Porous Media: Development of a Novel Nuclear Imaging Technique

2013 ◽  
Vol 1518 ◽  
pp. 123-129 ◽  
Author(s):  
Claire L. Corkhill ◽  
Jonathan W. Bridge ◽  
Philip Hillel ◽  
Laura J. Gardner ◽  
Steven A. Banwart ◽  
...  
Keyword(s):  
Nuclear Waste ◽  
Waste Disposal ◽  
Quartz Sand ◽  
Gamma Camera ◽  
Nuclear Imaging ◽  
Nuclear Waste Disposal ◽  
Cementitious Materials ◽  
Near Surface ◽  
Spatial Moments ◽  
Technetium 99M

ABSTRACTTechnetium-99, a β-emitting radioactive fission product of 235U, formed in nuclear reactors, presents a major challenge to nuclear waste disposal strategies. Its long half-life (2.1 x 105 years) and high solubility under oxic conditions as the pertechnetate anion [Tc(VII)O4] is particularly problematic for long-term disposal of radioactive waste in geological repositories. In this study, we demonstrate a novel technique for quantifying the transport and immobilisation of technetium-99m, a γ-emitting metastable isomer of technetium-99 commonly used in medical imaging. A standard medical gamma camera was used for non-invasive quantitative imaging of technetium-99m during co-advection through quartz sand and various cementitious materials commonly used in nuclear waste disposal strategies. Spatial moments analysis of the resulting 99mTc plume provided information about the relative changes in mass distribution of the radionuclide in the various test materials. 99mTc advected through quartz sand demonstrated typical conservative behaviour, while transport through the cementitious materials produced a significant reduction in radionuclide centre of mass transport velocity over time. Gamma camera imaging has proven an effective tool for helping to understand the factors which control the migration of radionuclides for surface, near-surface and deep geological disposal of nuclear waste.

scholarly journals BNFL and Nirex in deep water over nuclear waste disposal plans

Nature ◽  
1987 ◽  
Vol 329 (6137) ◽  
pp. 278-278
Author(s):  
Kathy Johnston
Keyword(s):  
Nuclear Waste ◽  
Waste Disposal ◽  
Deep Water ◽  
Nuclear Waste Disposal

The Role of Colloids in Nuclear Waste Disposal

1983 ◽  
Vol 26 ◽  
Author(s):  
A. Avogadro ◽  
G.De Marsily
Keyword(s):  
Ground Water ◽  
Nuclear Waste ◽  
Waste Disposal ◽  
Column Experiments ◽  
Colloidal Transport ◽  
Container Material ◽  
Colloidal Fraction ◽  
Filtration Model

ABSTRACTAspects of formation and characterization of a radioactive colloidal fraction released by the waste form or produced by association with microcolloids naturally existing in ground water or produced either by corrosion of container material or by degradation of backfill material are discussed. A filtration model has been developed in order to describe colloidal transport under field conditions. Comparison between data obtained with laboratory column experiments and theoretical evaluations is presented.

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