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Laura Anderson

Laura Anderson

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Viewing 20 posts - 1 through 20 (of 74 total)
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  • For radioactive waste the technical goal is not a new “recipe” for disposal but a durable, low-permeability containment system that limits radionuclide migration, resists radiation/thermal/chemical attack, and is verifiable over decades to centuries. In practice that means a multi-barrier strategy: an immobilization matrix (vitrification, cementitious or geopolymer matrices, bituminization or polymer encapsulation depending on waste type), corrosion‑resistant structural containers and engineered waterproof coatings or liners that protect the primary package and storage canister from water ingress and corrosion. Vitrified glass or ceramic matrices are industry standard for high‑level waste because of excellent chemical durability; cementitious and geopolymer matrices are widely used for low‑ and intermediate‑level wastes; bitumen and polymeric encapsulants are used where hydrophobic, compact barriers are required, keeping in mind organics can radiolyze and generate gases in high‑level applications.

    From a coatings and materials-production perspective choose systems proven for radiation stability, low permeability and long‑term adhesion: high‑crosslinked epoxies, ceramic coatings, fluoropolymer (PVDF) linings or fast‑curing polyurea/urethane systems for external canister protection, and dense, low‑porosity matrix formulations for immobilization. Control of formulation and process is critical: accurate solids/water ratios, degassing, controlled curing, densification and porosity minimization reduce leach rates; accelerated aging, gamma irradiation exposure, permeability and standardized leach testing together with mechanical and thermal cycling should be part of QA. Use appropriate industrial equipment—heated reactors and mixers for bituminization or polymer blending, high‑shear dispersers for stable emulsions, and vitrification melters or geopolymer casting systems in licensed facilities—while integrating nondestructive inspection and long‑term environmental monitoring.

    Any industrial coating or immobilization approach must comply with national nuclear waste regulations and be implemented by licensed nuclear waste management organizations. For feasible, safe industrial-scale solutions consult with your regulatory authority and a nuclear waste specialist to match waste form, immobilization matrix and corrosion‑resistant coating system to waste radioactivity, thermal output and expected repository conditions.

    Leading PF can cause overexcitation, voltage rise, insulation stress, and resonance issues. Generators and transformers prefer slightly lagging PF for stable operation.

    in reply to: How to measure power transformer impedance? #332285

    Short-circuit test yields percentage impedance (Z%). Used for fault level and parallel operation analysis.

    in reply to: What does a transformer do in a power station? #332207

    In a power station, transformers perform three roles: step-up for transmission, station service supply for auxiliary loads, and reserve/backfeed for startup/blackstart.

    Toroidal HV units may be used in medical, test, and RF systems where low leakage and compactness are critical.

    Three-phase: kVA = ?3 × V × I; current = kVA /(?3 × V). Single-phase uses I = kVA/V.

    Practices align with IEEE/IEC/ANSI guidelines: oil DGA, dielectric tests, OLTC contact wear checks, insulation resistance, thermography, and mechanical inspections.

    in reply to: What failures can lead to an exploding power transformer? #331057

    Internal winding faults, insulation breakdown, OLTC failures, arc faults, or rapid gas generation can cause tank rupture and fire if not mitigated by pressure relief or Buchholz protection.

    Yes, online DGA can be integrated with TOR-5, but usually as a separate module or external analyzer, not as a native built-in function. TOR-5 is designed around moisture, hydrogen, and conditioning, while full multi-gas DGA requires dedicated sensors and calibration. In practice, many users integrate TOR-5 data with an online DGA system at the SCADA/server level, so both trends are viewed together, but they remain two complementary subsystems, not a single sensor unit.

    No, bitumen modification is not suitable with all types of plastics. Only certain polymers that soften, swell, or partially dissolve in bitumen can form a stable PMB system. In practice, SBS, EVA, PE, and some polyolefin wastes are used, while plastics like PVC, PET, or highly crosslinked thermosets are unsuitable because they decompose, release gases, or remain as solid particles. The key factors are thermal stability, compatibility with bitumen fractions, and ability to form a homogeneous phase under mixing conditions.

    Exactly – that is a very accurate way to describe it. The AVS device does not change the fundamental chemical reaction or invent a new mechanism; it intensifies the kinetics. By creating extreme local shear, micro-collisions, and high mass-transfer rates, it reduces diffusion limits and activation delays, so the same reaction that would take minutes in a classical reactor can proceed in seconds. In this sense, AVS is a process accelerator, not a new chemistry.

    Moisture distribution plays a significant role in mitigating the dew point effect, but it cannot eliminate the risk entirely. When moisture is kept uniformly low and well distributed between oil and paper, the partial pressure of water vapor remains below the condensation threshold, even during load changes and cooling. This reduces the chance of free water forming on cold surfaces. However, if there are local moisture gradients or sudden temperature drops, condensation can still occur. That is why controlling average moisture and avoiding rapid thermal transients are both important for preventing internal dew formation.

    Distribution transformer suppliers range from global OEMs down to regional and local manufacturers. They provide pole-mount and pad-mount units, compact substations, and dry-type transformers for utilities and commercial/industrial customers. Many work via distributors and panel builders, while some sell directly or through framework agreements with utilities. Their offerings cover standard kVA ratings, multiple voltage combinations, various tap options, and fluid choices (mineral, ester).

    The UVB-20 plant can process bitumen of different grades including 60/70 and 160/220. Throughput is 20 t/h with full temperature and viscosity control.

    GlobeCore offers mobile transformer oil purification systems such as the CMM-0.6 and CMM-1.0 models. They are compact, trailer-mounted, and designed for field operation. We will send an indicative cost estimate.

    in reply to: Need a quotation for model CMM-1.0CF. #327380

    The CMM-1.0CF transformer oil purification unit processes 1 m³/h. It includes a heating chamber, vacuum degassing section, and fine filtration. Pricing and delivery details will be provided.

    in reply to: Inquiry for a vacuum pump repair kit for CMMU-1.0LSL. #327354

    GlobeCore supplies genuine spare parts for all CMMU-series systems, including vacuum pump maintenance kits. The correct set can be specified based on the unit serial number.

    in reply to: What is an industrial hot air dryer used for? #325077

    It involves regular inspections, DGA, moisture monitoring, and oil purification. GlobeCore offers tools for every step – from BDV test kits to mobile purification plants that restore oil properties on-site.

    in reply to: What is DGA trafo and how does it help in fault detection? #324817

    DGA for trafo (transformer) tracks internal arcing, overheating, or corona through gas signatures. For reliable data, GlobeCore preconditions the oil using degassing units – removing bubbles and dissolved gases that could distort readings.

    in reply to: What is the BDV test and what does it indicate? #324783

    The Breakdown Voltage (BDV) test shows the oil’s ability to withstand electric stress. Low BDV usually means moisture or particles in oil. GlobeCore’s vacuum dehydration and filtration systems restore BDV to optimal levels, ensuring safe transformer operation.

Viewing 20 posts - 1 through 20 (of 74 total)

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