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STUK backs Steady Energy’s SMR concept

By District Energy posted 06-25-2025 10:16

  

Engineering International

Summary

The Finnish Radiation & Nuclear Safety Authority (STUK – Säteilyturvakeskus) has completed an assessment of the concept of Steady Energy’s LDR-50 NPP. The concept assessment is a procedure proposed in the reformed Nuclear Energy Act whereby STUK can examine the prerequisites for designing and building a safe NPP, before any application for a construction permit is made. Steady Energy requested the assessment in late 2024.

The LDR-50 district heating small modular reactor (SMR) has been under development at VTT since 2020. The LDR-50, the size of a standard shipping container, is designed to be built underground for added safety and to free valuable real estate for key urban areas. It is optimised for district heating, industrial steam production, and desalination projects.

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