×
  • You must be logged in to create new topics.

Oliver Andersen

Oliver Andersen

Forum Replies Created

Viewing 20 posts - 1 through 20 (of 65 total)
  • Author
    Posts
  • If your goal is long-term immobilization of radioactive waste using materials and waterproofing technologies, think in terms of engineered containment systems rather than ad‑hoc coatings. Proven approaches combine an impermeable outer barrier (geomembranes such as HDPE or multilayer composite liners) with an internal immobilizing matrix: cementitious waste forms modified with polymers, bitumen encapsulation, or radiation‑resistant polymer matrices such as specially formulated epoxies or vinyl esters. Formulations must prioritize low permeability, chemical stability, resistance to gamma/alpha irradiation and radiolytic degradation, and mechanical integrity under thermal cycling and groundwater chemistry; mineral fillers (silica, barytes), swellable clays and antioxidant/stabilizer packages are commonly used to reduce diffusion and improve long‑term durability.

    Quality control and qualification testing are critical: accelerated ageing under gamma dose, leach rate/permeability tests, adhesion and flexural testing after irradiation, and freeze–thaw/thermal cycling to simulate repository conditions. In manufacturing, robust dispersion and heating equipment (high‑shear mixers, heated reactors and dispersers used to produce bitumen emulsions or polymer‑modified cementitious binders) ensure homogeneous, reproducible products; GlobeCore mixing and heating systems are suitable for producing stable polymer‑bitumen and polymer‑modified binder batches. Final note: nuclear waste management is heavily regulated and site‑specific — work with licensed radioactive waste engineers and regulatory authorities to select a containment strategy, validate formulations with accredited testing labs, and ensure long‑term monitoring and institutional controls.

    in reply to: What is electric power transformer? #332271

    Device transferring AC power through electromagnetic induction while adjusting voltage.

    in reply to: in a power transformer which winding is closer to the core? #332125

    In most power transformers, the low voltage winding is placed closest to the core, and the high voltage winding is wound outside of it. This arrangement improves insulation efficiency, since lower voltage windings have less insulation requirement to the grounded core, and high voltage windings can be insulated more easily from the lower voltage layer and tank. It also helps with mechanical stability against short circuit forces. In some special designs the order may differ, but low voltage near the core is the standard configuration.

    in reply to: What symptoms indicate a bad power transformer? #331767

    Symptoms include overheating, oil leaks, gas generation (DGA indicators), abnormal noise, bushing tracking, high moisture content, tan-delta drift, partial discharge, OLTC misoperation, and protection trips.

    in reply to: What are standard power transformer MVA ratings? #331725

    Standard ratings range from small distribution units at 0.05-5 MVA to substation transformers at 10-100+ MVA, and generator step-up units exceeding several hundred MVA in transmission grids.

    in reply to: How much does a power pole transformer cost to replace? #331601

    Replacement cost includes the transformer, disposal, labor, switching, outage coordination, and testing; total can reach several thousand USD.

    in reply to: What role does a transformer play in a nuclear power plant? #331419

    Nuclear plants use generator step-up transformers for grid connection, station transformers for auxiliaries, and backup supply transformers for safety systems.

    in reply to: What applications use Marelco power systems transformers? #331383

    Marelco products are used in marine and industrial environments requiring rugged power conversion, isolation, and corrosion-resistant construction.

    Isolation transformers provide galvanic separation between primary and secondary circuits, reducing touch voltages, ground faults, and noise coupling. Used in medical, industrial, and test environments.

    in reply to: What is the permissible moisture content in a transformer? #330800

    There is no single permissible moisture value that fits all transformers, because it depends on oil type, temperature, voltage class, and insulation condition. For mineral oil at operating temperature, many utilities consider 20-30 ppm acceptable for new or well-maintained units, while above 40-50 ppm usually triggers closer monitoring. More important than ppm is relative saturation or water activity, because risk of free water and paper wetting depends on temperature. In practice, keeping paper moisture below about 2% is a common long-term target.

    in reply to: What winding types are used in power transformers? #330798

    Helical for high currents, disc for HV, layer for LV, continuous wind for short-circuit strength, and foil for LV/high current.

    in reply to: Need spare parts for existing equipment. #327527

    Original spare parts and consumables are available for all GlobeCore systems. Please specify the model to provide the correct kit.

    GlobeCore offers transformer oil filtration machines with flow rates from 600 to 6000 L/h. They include heating, filtration, vacuum degassing, and real-time monitoring – restoring oil to IEC 60296 standards.

    in reply to: Where can I find hydraulic oil filtration services near me? #325441

    Instead of hiring external services, many companies now use in-house solutions. GlobeCore provides portable hydraulic oil filtration systems that remove water, particles, and sludge onsite. These units are perfect for factories, CNC lines, and construction fleets.

    La contaminación del aceite hidráulico puede causar fallos graves en sistemas críticos. GlobeCore desarrolla equipos que filtran hasta 1 micra, eliminando partículas y agua. Esto garantiza mayor fiabilidad en maquinaria hidráulica pesada y prolonga la vida de los componentes.

    GlobeCore designs and sells bitumen tanks suitable for both standard and modified bitumen, with heated coils, mixers, and temperature monitoring systems. These tanks are used worldwide at asphalt plants, terminals, and mobile sites. Delivery, installation, and commissioning are available globally.

    The DGA test checks for fault gases like H?, C?H?, CH?. If the oil isn’t properly treated, results may show false alarms. GlobeCore vacuum degassing equipment ensures reliable oil condition before testing.

    For continuous operation, GlobeCore offers mobile and stationary hydraulic oil filtration machines with multi-stage filtration (1-5 �m), vacuum dehydration, and flow rates up to 4000 L/h. These machines reduce downtime and prevent equipment failure in critical production lines.

    in reply to: How much is Shell Turbo T46 and how is it serviced? #324008

    Shell Turbo T46 is a medium-viscosity lubricant, and its price reflects its industrial-grade formulation. GlobeCore purification systems clean and dry Turbo T46, preserving its lubricating performance.

    in reply to: How is AeroShell turbine oil used in aviation engines? #323840

    AeroShell turbine oil is a synthetic or ester-based lubricant designed to handle extreme heat and oxidation in jet engines. GlobeCore purification units filter, degas, and dry these oils, ensuring long-lasting performance.

Viewing 20 posts - 1 through 20 (of 65 total)

Sign up

Sign in

To continue log in with Google.