Tadas Kaliatka

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


Slavickas A. [LEI], Tidikas A. [LEI], Kaliatka T. [LEI]. Numerical simulation of axial and radial decay heat distribution in spent RBMK-1500 fuel assembly In: Annals of Nuclear Energy. Oxford: Elsevier, 2024, Vol. 206, 110665, p. 1-10. ISSN 0306-4549.
Elsalamouny N. [LEI], Kaliatka T. [LEI], Kaliatka A. [LEI]. QUENCH-20 test analysis using RELAP/SCDAPSIM severe accident code In: Nuclear Engineering and Design. Lausanne: Elsevier, 2024, Vol. 419, 112995, p. 1-12. ISSN 0029-5493.
Mascari F., Bersano A., Massone M., Agnello G., Vileiniškis V. [LEI], Kaliatka T. [LEI], et al. Main outcomes of the Phebus FPT1 uncertainty and sensitivity analysis in the EU-MUSA project In: Annals of Nuclear Energy . Oxford: Elsevier, 2024, Vol. 196, 110205, p. 1-10. ISSN 0306-4549, eISSN 1873-2100.
Kaliatka T. [LEI], Kačegavičius T. [LEI], Kaliatka A. [LEI], Povilaitis M. [LEI], Tidikas A. [LEI], Slavickas A. [LEI]. Methods for the radioactive release estimation under DEC-A conditions In: Annals of Nuclear Energy. Oxford: Elsevier, 2024, Vol. 195, 110143, p. 1-18. ISSN 0306-4549.


Kaliatka A. [LEI], Graževičius A. [LEI], Kaliatka T. [LEI]. Analysis of loss of cooling accidents in the spent fuel pools using system thermal hydraulics and computational fluid dynamic codes In: Nuclear Engineering and Design. Lausanne: Elsevier, 2023, Vol. 412, p. 1-14. ISSN 0029-5493.


Slavickas A. [LEI], Kaliatka T. [LEI], Pabarčius R. [LEI], Rimkevičius S. [LEI]. The impact of fuel depletion scheme within SCALE code on the criticality of spent fuel pool with RBMK fuel assemblies In: Nuclear Engineering and Technology . Saejeon: Elsevier, 2022, Vol. 54, Iss. 12, p. 4731-4742. ISSN 1738-5733.
Terranova N., Contessa C. M., Pace L. D., Gasparrini C., Kaliatka T. [LEI], Mariano G., Breidokaitė S. [LEI]. Activated Corrosion Products Evaluations for Occupational Dose Mitigation in Nuclear Fusion Facilities In: Environments . Basel: MDPI, 2022, Vol. 9, Iss. 7, 76, p. 1-10. ISSN 2076-3298.
Kaliatka A. [LEI], Vaišnoras M. [LEI], Valinčius M. [LEI], Kaliatka T. [LEI]. RELAP5 application for water hammer analysis in different thermal-hydraulic systems In: International Journal of Thermofluids . Oxford: Elsevier, 2022, Vol. 14, 100154, p. 1-13. Scopus ..
Ragaišis V. [LEI], Kaliatka T. [LEI], Poškas P. [LEI], Kaliatka A. [LEI], Šmaižys A. [LEI], Janulionis R. [LEI], Narkūnas E. [LEI], Sirvydas A. [LEI], Babilas E. [LEI], Rimkevičius S. [LEI]. A proposed approach for the evaluation of consequences of a large aircraft crash accident at an RBMK type reactor site during decommissioning In: Progress in Nuclear Energy. Oxford: Elsevier, 2022, Vol. 145, 104135, p. 1-15. ISSN 0149-1970, eISSN 1878-4224.


Elsalamouny N. [LEI], Kaliatka T. [LEI]. Uncertainty Quantification of the PHEBUS FPT-1 Test Modelling Results In: Energies. Basel: MDPI, 2021, Vol. 14, 7320, p. 1-17. ISSN 1996-1073.

Conference paper


Shirzadi S. [LEI], Slavickas A. [LEI], Kaliatka T. [LEI]. Verification of MAVRIC module against Monaco module within SCALE code against photon flux In: CYSENI 2023: 19th International Conference of Young scientists on energy and natural sciences issues 23-26 May 2023, Kaunas, Lithuania. Kaunas: Lietuvos energetikos institutas, 2023, p. 32-32. ISSN 2783-6339.
Elsalamouny N. [LEI], Kaliatka T. [LEI], Allison C. M.. Different numerical modeling approaches applied to relap/scdapsim code for the simulation of quench-20 test In: Proceedings of the 2023 30th International Conference on Nuclear Engineering ICONE30 . Kyoto: The Japan Society of Mechanical Engineers, 2023, p. 1-9..


Girault N., Mascari F., Kaliatka T. [LEI], et al. The R2CA project for evaluation of radiological consequences at design basis accidents and design extension conditions for lwrs: motivation and first results In: Proceedings of the 10th European Review Meeting on Severe Accidents Research (ERMSAR2022) May 16-19, 2022. Karlsruhe: Karlsruher Institut für Technologie (KIT), 2022, ID: 332, p. 1-12..
Kaliatka T. [LEI], Kačegavičius T. [LEI], Povilaitis M. [LEI], Kaliatka A. [LEI]. Analysis of loca accident for BVR-4 under DEC-A conditions using astec code In: Proceedings of the 10th European Review Meeting on Severe Accidents Research (ERMSAR2022) May 16-19, 2022. Karlsruhe: Karlsruher Institut für Technologie (KIT), 2022, Log. No. 318, p. 1-11..
Slavickas A. [LEI], Tidikas A. [LEI], Kaliatka T. [LEI]. RBMK-1500 Spent Fuel Characterization using SCALE and TRANSURANUS codes In: Proceeding book The 13th International Topical Meeting on Nuclear Reactor Thermal-Hydraulics, Operation and Safety (NUTHOS 13) Hsinchu, Taiwan, September 5-10, 2022. Taichung, Taiwan (virtual): National Tsing HUA University, 2022, N13P187, p. 1-12..
Elsalamouny N. [LEI], Kaliatka T. [LEI], Kaliatka A. [LEI]. Lei quench tests modelling experience and the preliminary modelling results of quench-20 test using relap/scdapsim In: Proceedings 16th International conference on heat transfer, fluid mechanics and thermodynamics. Stellenbosch: Stellenbosch University, 2022, p. 606-611. ISBN 978-0-7972-1886-4.
Elsalamouny N. [LEI], Kaliatka T. [LEI]. Development of a numerical model of quench-20 test based on lei experience on modelling of quench tests In: CYSENI 2022: 18th international conference of young scientists on energy and natural sciences issues, 24-27 May 2022, Kaunas, Lithuania. Kaunas: Lithuanian Energy Institute, 2022, p. 257-260. ISSN 2783-6339.


Elsalamouny N. [LEI], Kaliatka T. [LEI]. Uncertainty and sensitivity analysis of the phebus fpt1 test simulation results In: The 17th International Conference of Young Scientists on Energy and Natural Sciences Issues (CYSENI 2021) Kaunas, Lithuania, May 24-28, 2021. Kaunas: Lietuvos energetikos institutas, 2021, p. 448-449. ISSN 1822-7554.
Kaliatka A. [LEI], Vaišnoras M. [LEI], Valinčius M. [LEI], Kaliatka T. [LEI]. RELAP5 application for water hammer analysis in different thermal-hydraulic systems 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. 1921-1926. ISBN 978-1-77592-216-2 .


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..

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.


Kaliatka A. [LEI], Kaliatka T. [LEI]. Experts from Lithuanian Energy Institute trained algerian specialists in the field of severe accident analysis In: Energetika (Kronika). Vilnius: Lietuvos mokslų akademija, 2018, T. 64, Nr. 2, p. 4-5. ISSN 0235-7208.


Kaliatka T. [LEI]. Alžyro branduolinės saugos specialistų stažuotė Lietuvos energetikos institute In: Energetika (Kronika). Vilnius: Lietuvos moksl7 akademija, 2017, T. 63, Nr. 1, p. iii-iv. ISSN 0235-7208.


Kaliatka T. [LEI]. Atomic energy researchers and research students acceptance program In: Energetika (Kronika). Vilnius: Lietuvos mokslų akademija, 2016, T. 62, Nr. 1-2, p. 1-2. ISSN 0235-7208.


Kaliatka T. [LEI]. 16th International Topical Meeting on Nuclear Reactor Thermal Hydraulics In: Energetika. (Kronika)[EBSCO, IndexCopernicus, SCOPUS]. Vilnius: Lietuvos mokslų akademija, 2015, T. 61, Nr. 3-4, p. 1-2. ISSN 0235-7208.

International projects

Horizon Europe


Increasing further the safety of light water nuclear reactors in the new operating conditions induced by their integration in a more varied energy mix brings many new challenges for fMore


Small Modular Reactors (SMR) are one of the key options for the near-term deployment of new nuclear reactors. Currently in Europe there is a growing interest towards the deployment ofMore


EUROfusion’s updated Fusion Research Roadmap aims to acquire the necessary knowledge to start constructing a demonstration fusion power plant (DEMO) five years after ITER is in full-pMore

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

MUSA project logo

The overall objective of the MUSA project is to assess the capability of SA codes when modelling reactor and SFP accident scenarios of GEN II, GEN III and GEN III+ reactor designs. ToMore

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


The goal of the project is an analysis of the applicability and technical feasibility of the IVMR strategy to high power reactors, both for existing ones (e.g. VVER 1000 type 320 unitMore


EUROfusion, the ‘European Consortium for the Development of Fusion Energy’, manages and funds European fusion research activities on behalf of Euratom. Thirty members*, representing More

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


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


The European Sustainable Nuclear Industrial Initiative was launched in November 2010 to anticipate the development a fleet of fast reactors with closed cycle. Three fast neutron technMore


Most of the actors involved in severe accident research in Europe, plus Canada, Korea and the United States (41 partners), will network in SARNET2 (Severe Accident Research NETwork ofMore


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



Two Russian design channel-type graphite-moderated boiling water reactors (RBMK-1500) were shut down for decommissioning in 2004 (Unit 1) and 2009 (Unit 2) at the Ignalina Nuclear PowMore


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

IAEA logo

The Coordinated Research Project (CRP) aims to progress the understanding and modelling and simulation of major physical phenomena occurring in the strategy of In-Vessel Melt RetentioMore

IAEA logo

Description - Advanced understanding of the status and capabilities of multi-physics/multi-scale simulation tools in modeling propagation and consequences of severe accidents in advaMore


Investigations will be performed for the two types of passive systems: when the final heat sink is water, when the final heat sink is air. In the frame of this IAEA CoordinMore