High‑density aggregate for nuclear new build, waste management and decommissioning
MagnaDense is a premium high-density aggregate derived from natural magnetite, used in applications that require more weight in less volume, such as radiation shielding.
MagnaDense concrete has been specified in nuclear projects across Europe, North America, and Asia, supporting applications from new reactor construction to spent fuel storage and decommissioning.
Key Benefits
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High-density for effective radiation shielding
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Reduced wall thickness and structural volume
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Reliable and consistent material quality
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Industry approved solution
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Proven performance in nuclear environments
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Secure, scalable supply from LKAB Minerals
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Supports compact and optimised structural designs
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Environmentally responsible, inert material
Typical concrete densities of up to 4.0 t/m³ can be achieved, depending on mix design.
Nuclear New Build & Advanced Reactors (Including SMRs)
Modern nuclear facilities require highly reliable radiation shielding while optimising construction efficiency. High‑density concrete made with MagnaDense allows engineers to reduce wall thickness, structural loads, and overall footprint, while maintaining the highest safety standards.
MagnaDense has been supplied to major nuclear new‑build projects, including advanced reactor safety systems and next‑generation plant designs designed to manage severe accident scenarios.
Core Melt Stabilisation Systems (CMSS)
MagnaDense plays a critical role in core melt stabilisation systems, which are designed to capture and cool molten core material in emergency scenarios. Compared to conventional concrete, MagnaDense offers superior containment and shielding performance, making it well‑suited for sacrificial and protective concrete layers in these systems.
Spent Fuel & Radioactive Waste Storage
High‑density concrete produced with MagnaDense is widely used in spent fuel and radioactive waste storage infrastructure, where long‑term shielding reliability is essential.
In dry storage applications, MagnaDense concrete:
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Provides effective radiation shielding
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Supports management and dissipation of residual heat
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Helps maintain stable storage conditions over long periods
Supporting Safe Nuclear Decommissioning
During nuclear facility decommissioning, reliable shielding and containment solutions are critical. High‑density MagnaDense concrete and LKAB supplied grouts support reactor dismantling, waste handling, and temporary radioactive material storage.
Its durability and long‑term stability make MagnaDense particularly suitable for environments requiring lasting radiation protection and structural integrity.
Applications include:
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Long-term concrete storage systems and shielding structures
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Concrete and encapsulation materials for decommission containers/boxes
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Infrastructure for Intermediate Level Waste (ILW) storage
Research & Scientific Facilities
Large-scale research facilities, including particle accelerators, fusion research programmes, neutron science centres, and experimental laboratories, require shielding materials capable of managing intense neutron and gamma radiation while supporting complex structural designs.
Examples of major European research infrastructure projects that use MagnaDense include the European Spallation Source in Sweden and ITER in France. Both facilities require advanced radiation-shielding solutions for next-generation scientific research.
