Raimondas Pabarčius

Laboratory of Nuclear Installation Safety (17)
Head (Senior research associate)
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Scientific article


Miliauskas G., Pabarčius R. [LEI], Maziukienė M.. Uncertainty and sensitivity analysis of boundary conditions during water droplet phase change regimes In: International journal of thermal sciences. Issy-les-Moulineaux: Elsevier Masson SAS, 2022, Vol. 171, 107228, p. 1-20. Scopus . ISSN 1290-0729, eISSN 1778-4166.


Slavickas A. [LEI], Pabarčius R. [LEI], Tonkūnas A. [LEI], Rimkevičius S. [LEI]. Neutron Transport Simulations of RBMK Fuel Assembly Using Multigroup and Continuous Energy Data Libraries within the SCALE Code In: Science and Technology of Nuclear Installations. London: Hindawi , 2021, Vol. 2021, 6673489, p. 1-11. ISSN 1687-6075.


Tonkūnas A. [LEI], Pabarčius R. [LEI], Slavickas A. [LEI]. Evaluation of coolant density history effect in RBMK type fuel modelling In: Nuclear Engineering and Technology. Daejeon: Elsevier, 2020, Vol. 52, Iss. 11, p. 2415-2421. ISSN 1738-5733.


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.


Slavickas A. [LEI], Pabarčius R. [LEI], Tonkūnas A. [LEI], Ušpuras E. [LEI]. Uncertainty and Sensitivity Analysis of Void Reactivity Feedback for 3D BWR Assembly Model In: Science and Technology of Nuclear Installations. 2017, Vol. 2017, p. 1-9. ISSN 1687-6075.


Šeporaitis M. [LEI], Valinčius M. [LEI], Gasiūnas S. [LEI], Laurinavičius D. [LEI], Pabarčius R. [LEI], Kaliatka A. [LEI], Almenas K.. Tarpfazinės sąveikos ir kondensacijos tyrimai In: Energetika. Vilnius: Lietuvos mokslų akademija, 2016, T. 62, Nr. 3, p. 206-218. 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.
Ammirable L., Tuček K., Blanc D., Pabarčius R. [LEI], Kaliatka A. [LEI], Mansani L., Carluec B., Dufour P., Homann C.. SARGEN-IV: Consideration on the possible content of the safety analysis report for innovative ESNII reactors In: Nuclear Engineering and Design. Nyderlandai: Elsevier, 2016, Vol. 300, p. 452-466. ISSN 0029-5493.


Tonkūnas A. [LEI], Pabarčius R. [LEI]. Proporcingumo daugiklių metodas radioaktyviosioms atliekoms charakterizuoti In: Energetika. (Kronika) [EBSCO, IndexCopernicus, SCOPUS]. Vilnius: Lietuvos mokslų akademija, 2015, T. 61, Nr. 1, p. 25-31. ISSN 0235-7208.
Slavickas A. [LEI], Pabarčius R. [LEI], Tonkūnas A. [LEI], Stankūnas G. [LEI], Ušpuras E. [LEI]. Void reactivity coefficient analysis during void fraction changes in innovative BWR assemblies In: Science and Technology of Nuclear Installations. London: Hindawi, 2015, Vol. 2015, p. 1-8. ISSN 1687-6075.

Conference paper


Rimkevičius S. [LEI], Kaliatka A. [LEI], Pabarčius R. [LEI]. Heat transfer in pebble bed with longitudinal cylinders In: Proceedings 15th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics (ATE-HEFAT2021), Virtual conference, 26-28 July 2021.. Amsterdam: American Society of Thermal and Fluids Engineers, 2021, p. 1121-1125. ISBN 978-1-77592-216-2 .

Popular science article


Augutis J. [LEI], Babilas E. [LEI], Dundulis G. [LEI], Kaliatka A. [LEI], Kaliatka T. [LEI], Krikštolaitis R. [LEI], Martišauskas L. [LEI], Rimkevičius S. [LEI], Pabarčius R. [LEI], Povilaitis M. [LEI], Stankūnas G. [LEI], Urbonas R. [LEI], Urbonavičius E. [LEI]. Scientific inheritance of Eugenijus Ušpuras In: Kerntechnik. Munchen: Carl Hanser Verlag, 2020, Vol. 85, Iss. 2, p. 72-81. ISSN 0932-3902.
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], Graževičius A. [LEI]. Training possibilities in the European Nuclear Education Network In: Energetika (Kronika). 2019, Vol. 65, No. 1, p. 1-2. ISSN 0235-7208.
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], 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.


Urbonavičius E. [LEI], Pabarčius R. [LEI]. Radioaktyvių medžiagų nuotėkis ir avarinė parengtis įvykus avarijai atominėje elektrinėje (FASTNET projektas) In: Energetika. (Kronika) [EBSCO, IndexCopernicus, SCOPUS]. Vilnius: Lietuvos mokslų akademija, 2015, T. 61, Nr. 3-4, p. 9-10. ISSN 0235-7208.

International projects

Horizon 2020

ELSMOR project logo

ELSMOR (towards European Lisencing of Small MOdular Reactors) aims to create methods and tools for the European stakeholders to assess and verify the safety of light water small modulMore

R2CA project logo

The Reduction of Radiological Consequences of design basis and extension Accidents (R2CA) is an EU H2020 project launched in September 2019. It will run for four years and is coordinaMore

FASTNET project logo

The FASTNET project is a four-years European project funded by the Euratom Research and Training Programme 2014-2018. This project has received funding from the Euratom research and tMore


The region of the European Union around the Baltic sea especially the countries Estonia, Latvia and Lithuania are not adequately integrated to the European electricity grid. At the enMore

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



In order to assess the ability of spent fuel assemblies to meet the requirements for transition from one back end fuel cycle step to another, certain characteristics have to be known More

Other international projects


Project participants: Aslan Avcı Döküm Sanayi ve Ticaret A.Ş., Turkey Lietuvos energetikos institutas, LithuaniaMore