LIETUVOS ENERGETIKOS INSTITUTAS

Their core work

LEI is Lithuania's principal energy research institute, based in Kaunas, with deep expertise in nuclear safety analysis and energy efficiency policy. They perform severe accident modeling for nuclear power plants, assess radioactive waste management and disposal strategies, and evaluate national and EU-level energy efficiency policies. Beyond nuclear, they work on thermochemical conversion of waste to energy, distributed solar PV integration, and industrial water-energy recovery systems.

What they specialise in

How they've shifted over time

In the early H2020 period (2014–2018), LEI focused heavily on nuclear safety fundamentals — severe accident management, melt retention, environmental fatigue, and emergency response tools — reflecting their legacy as a nuclear research institute supporting the post-Ignalina landscape. From 2019 onward, while maintaining their nuclear safety portfolio (MUSA, R2CA, ELSMOR), they broadened significantly into energy efficiency policy, building energy renovation, waste-to-energy gasification, and industrial resource recovery. This shift signals a deliberate diversification from pure nuclear research toward applied energy transition topics with clearer commercial and policy relevance.

LEI is evolving from a nuclear-focused institute toward a broader energy transition research center, making them increasingly relevant for projects combining waste valorization, energy efficiency policy, and decarbonization alongside their established nuclear expertise.

How they like to work

LEI overwhelmingly operates as a consortium partner (23 of 26 projects) rather than a leader, which is typical for a mid-sized national research institute contributing specialized expertise to large European consortia. With 455 unique partners across 42 countries, they maintain an exceptionally wide network rather than concentrating on repeat collaborators. Their 3 coordinator roles (BRILLIANT, EnergyKeeper, TWIN-PEAKS) are in smaller, more focused projects, suggesting they lead when the topic closely matches their core strengths or regional mission.

LEI has collaborated with 455 unique partners across 42 countries, giving them one of the broader networks among Baltic research institutes. Their partnerships span Western European nuclear research leaders (through EURAD, EUROfusion) and energy policy networks across the EU.

What sets them apart

LEI is one of very few organizations in the Baltic region that combines nuclear safety expertise with energy efficiency policy work — two domains rarely found under one roof. Their Ignalina-era nuclear heritage gives them practical experience with RBMK reactor decommissioning and graphite waste challenges that almost no Western European institute possesses. For consortium builders, they offer a Widening Country partner with genuine technical depth, not just a flag-of-convenience participation.

Highlights from their portfolio

• EUROfusion
  Largest single grant (EUR 715k) connecting LEI to Europe's flagship fusion energy programme — signals access to top-tier plasma and materials research networks.
• TWIN-PEAKS
  Coordinator role in a Twinning project on waste gasification, showing LEI actively building capacity in waste-to-energy — a strategic pivot from their nuclear core.
• iWAYS
  Second-largest grant (EUR 454k) and their most recent large project, focused on industrial water-energy recovery — represents their newest research direction.