Eugenijus Ušpuras

Laboratory of Nuclear Installation Safety (17)
Head (Chief research associate)
Room number:
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The person is no longer employed at the Institute


Scientific article


Graževičius A. [LEI], Kaliatka A. [LEI], Ušpuras E. [LEI]. Numerical investigation of two-phase natural convection and temperature stratification phenomena in a rectangular enclosure with conjugate heat transfer In: Nuclear Engineering and Technology. Daejeon: Elsevier, 2020, Vol. 52, Iss. 1, p. 27-36. ISSN 1738-5733.


Kaliatka A. [LEI], Ušpuras E. [LEI]. Heat removal from RBMK reactor core using non-regular means In: Nuclear Engineering and Design. Elsevier, 2019, Vol. 354, 110165, p. 1-13. ISSN 0029-5493.


Valinčius M. [LEI], Kaliatka T. [LEI], Kaliatka A. [LEI], Ušpuras E. [LEI]. Modelling of severe accident and in-wessel melt retention possibilities in BWR type reactor In: Science and Technology of nuclear Installations. London, England: Hindawi, 2018, Vol. 2018, p. 1-14. ISSN 1687-6075.
Babilas E. [LEI], Dokucajev P., Janulevičius D., Markelov A., Pabarčius R. [LEI], Rimkevičius S. [LEI], Ušpuras E. [LEI], Vaišnoras M. [LEI]. Innovative technologies for spent fuel safe management at Ignalina channel-type reactors In: Nuclear engineering and technology. Daejeon, South Korea: Korean Nuclear Society, Published by Elsevier Korea LLC, 2018, Vol. 50, Iss. 3, p. 504-511. ISSN 1738-5733.


Ušpuras E. [LEI], Rimkevičius S. [LEI], Urbonavičius E. [LEI], Kaliatka A. [LEI], Dundulis G. [LEI], Alzbutas R. [LEI], Stankūnas G. [LEI], Vaišnoras M. [LEI], Vileiniškis V. [LEI], Povilaitis M. [LEI], Kaliatka T. [LEI], Janulionis R. [LEI], Karalevičius R. [LEI], Voronov R. [LEI], Iešmantas T. [LEI], Kačegavičius T. [LEI]. Branduolių sintezės tyrimai Lietuvos energetikos institute In: Energetika. Vilnius: Lietuvos mokslų akademija, 2016, T. 62, Nr. 3, p. 102-123. ISSN 0235-7208.
Augutis J. [LEI], Krikštolaitis R. [LEI], Martišauskas L. [LEI], Ušpuras E. [LEI], Žutautaitė I. [LEI]. Energetinio saugumo tyrimų raida Lietuvoje In: Energetika. Vilnius: Lietuvos mokslų akademija, 2016, T. 62, Nr. 4, p. 232-246. ISSN 0235-7208.
Slavickas A. [LEI], Pabarčius R. [LEI], Tonkūnas A. [LEI], Ušpuras E. [LEI]. Analysis of void reactivity coefficient for 3D BWR assembly model In: Science and Technology of Nuclear Installations. Niujorkas: Hindawi Publisching Corporation, 2016, Vol. 2016, Article ID 3427549, p. 1-9. ISSN 1687-6075.
Kaliatka T. [LEI], Ušpuras E. [LEI], Kaliatka A. [LEI]. Modelling of pressure increase protection system for the vacuumvessel of W7-X device In: Fusion Engineering and Design. Nyderlandai: Elsevier, 2016, Vol. 109-111, Part A, p. 114-118. ISSN 0920-3796.
Dundulis G. [LEI], Žutautaitė I. [LEI], Janulionis R. [LEI], Ušpuras E. [LEI], Rimkevičius S. [LEI], Eid M.. Integrated failure probability estimation based on structural integrity analysis and failure data: Natural gas pipeline case In: Reliability Engineering & System Safety. Didžioji Britanija: Elsevier, 2016, Vol. 156, p. 195-202. ISSN 0951-8320.
Rimkevičius S. [LEI], Vaišnoras M. [LEI], Babilas E. [LEI], Ušpuras E. [LEI]. HAZOP application for the nuclear power plants decommissioning projects In: Annals of Nuclear Energy. Didžioji Britanija: Elsevier, 2016, Vol. 94, p. 461-471. ISSN 0306-4549.

Conference paper


Autrusson B., Van Dordsselaere J. P., Adorni M., Rocchi F., Cizelj L., Fedotova N., Shevchenko S., Schaffrath A., Pecherytsia O., Ušpuras E. [LEI], Nitoi M., Yamamoto Y., Power S.. Overview of ETSON modelling and experimental capabilities for R&D on nuclear safety: ETSON Research Group In: Challenges faced by technical and scientific support organizations (TSOs) in enhancing nuclear safety and security: ensuring effective and sustainable expertise, IAEA Series: Proceedings series. Proceedings of an International Conference Brussels, Belgium, 15–18 October 2018. Vienna: International Atomic Energy Agency (IAEA), 2021, p. 119-128. ISSN 0074–1884 ISBN 978-92-0-121021-0.


Kaliatka A. [LEI], Kaliatka T. [LEI], Vileiniškis V. [LEI], Ušpuras E. [LEI]. Best Estimate Approach for the Simulation of Reactor Core Overheating and Quenching Experiments In: Best Estimate Plus Uncertainty International Conference. Multi-Physics Multi-Scale Simulations with Uncertainty (BEPU 2018) May 13-18, 2018. Lucca, Italy: 2018, p. 1-12..
Kaliatka A. [LEI], Ušpuras E. [LEI]. Application of the BE Approach for the Analysis of Design and Beyond Design Basis Accidents In: Best Estimate Plus Uncertainty International Conference. Multi-Physics Multi-Scale Simulations with Uncertainty (BEPU 2018) May 13-18, 2018 . Lucca, Italy: 2018, p. 1-12..


Van Dorsselaere J.P., Barrachin M., Millington D., Adorni M., Hrehor M., Macari F., Schaffrath A., Tiselj I., Ušpuras E. [LEI], Yamamoto E., Gumenyuk D., Fedotova N., Cronvall O., Liska P.. Summary of ETSON strategic orientations on research activities. ETSON Research Group activity In: Proceedings of the EUROSAFE Forum 2017 Paris, 6 and 7 November 2017. Prancūzija: IRSN, 2017, p. 121-132. ISBN 978-2-9545237-8-1.
Kaliatka T. [LEI], Ušpuras E. [LEI], Kaliatka A. [LEI]. Analysis of Station Blackout Accident in ABWR Reactor In: 17th International Topical Meeting on Nuclear Reactor Thermalhydraulics” (NURETH-17) September 3-8, 2017 Kinija . Sianas: 2017, p. 1-1..
Kaliatka T. [LEI], Ušpuras E. [LEI], Kaliatka A. [LEI]. Application of BE approach for the different nuclear fission and fusion facilities In: 17th International Topical Meeting on Nuclear Reactor Thermalhydraulics” (NURETH-17) September 3-8, 2017. Kinija. Sianas: 2017, p. 1-1..
Žutautaitė I. [LEI], Dundulis G. [LEI], Rimkevičius S. [LEI], Ušpuras E. [LEI], Eid M., Stakelytė G.. Estimation of rare events probabilities in natural gas transmission networks In: 10th International conference on mathematical methods in reliability (MMR 2017). Grenoble, France: 2017, p. 1-9..
Kaliatka T. [LEI], Ušpuras E. [LEI], Allison Ch. M.. Modeling of quench 10 experiment on air ingress using relap/scdapsim mod 3.5 In: Proceedings of the 2017 25th International Conference on Nuclear Engineering ICONE25 July 2-6, 2017(ICONE25-66135), China.. Shanghai: ASME (The American Society of Mechanical Engineers), 2017, p. 1-7..


Kaliatka A. [LEI], Kaliatka T. [LEI], Ušpuras E. [LEI], Mochizuki H.. Modelling of critical heat flux phenomenon in the boiling water reactors In: Proceedings of the 11th International Conference of the Croatian Nuclear Society Zadar, Croatia, 5-8 June 2016. . Zagreb, Croatia: Croatian Nuclear Society, 2016, p. 1-10. ISBN 978-953-55224-8-5 (USB).


Kaliatka A. [LEI], Vileiniškis V. [LEI], Ušpuras E. [LEI]. Analysis of heat removal accidents during the wet storage phase in Ignalina nuclear power plant In: The 26th international symposium on transport phenomena . Leoben, Austria: 2015, p. 1-8..

Popular science article


Babilas E. [LEI], Pabarčius R. [LEI], Vaišnoras M. [LEI], Ušpuras E. [LEI], Rimkevičius S. [LEI], Šeporaitis M. [LEI], Tonkūnas A. [LEI]. LEI activities in the EU projects directed to support the Regulatory Body of Iraq In: Energetika. Vilnius: Lietuvos mokslų akademija, 2020, T. 66, Nr. 1, p. i-ii. EBSCO (Academic Search Complete), INSPEC, Index Copernicus, SCOPUS, VINITI, Ulrich's Web . ISSN 0235-7208, eISSN 1822-8836.


Pabarčius R. [LEI], Babilas E. [LEI], Ušpuras E. [LEI]. LEI activities as ETSON Consortium member in EC project In: Energetika (Kronika). 2019, Vol. 65, No. 4, p. 8-9. ISSN 0235-7208.


Ušpuras E. [LEI], Minkevičius A. [LEI]. Kontroliuojama branduolių sintezė In: Lietuvos mokslų akademijos žinios. Vilnius: Lietuvos mokslų akademija, 2018, Nr. 3 (85), p. 17-17. ISSN 2029-5707.
Ušpuras E. [LEI], Pabarčius R. [LEI], Slavickas A. [LEI]. GEMINI Plus project for HTGR nuclear cogeneration demonstration In: Energetika (Kronika). Vilnius: Lietuvos mokslų akademija, 2018, Vol. 64, Nr. 1, p. 2-3. ISSN 0235-7208, eISSN 1822-8836.


Ušpuras E. [LEI]. Paryžiaus susitarimai dėl klimato kaitos: ką jie reiškia Lietuvai ir visai energetikai In: ir energetika (el. portalas). 2016-01-13. 2016, internetinė prieiga:


Ušpuras E. [LEI]. SAM guides for Ignalina: concrete benefits derived from SARNET In: EUROSAFE Tribune. Media Cologne, Hürth: GRS & IRSN, 2015, No. 28, p. 21-21. ISSN 1634-7676.

International projects

Seventh Framework Programme (FP7)


The ARCADIA project has been conceived so as to provide a twofold support to the further development of nuclear research programs in the NMS, targeting two major areas included in theMore


The strategic objective of NC2I-R is to structure the European public and private R&D capabilities for delivering a nuclear cogeneration demonstrator fully meeting the market needMore


The objective of the NUGENIA+ project is to support the NUGENIA Association in its role to coordinate and integrate European research on safety of the Gen II and III nuclear installatMore


Since 2013, LEI participated in the Consortium, managed by the Institut de Radioprotection et de Sûreté Nucléaire (IRSN), by implementing EU Seventh Framework Programme project AdvancMore


The Fukushima accidents highlighted that both the in-depth understanding of such sequences and the development or improvement of adequate severe accident management measures is essentMore


Today, about 80% of all energy produced comes from the fossil fuel (oil, carbon, and natural gas). European scientists are developing environmentally friendly, safe, and renewable eneMore