Ernestas Narkūnas

Nuclear Engineering Laboratory (14)
Senior research associate
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Barinova E., Beer H. F., Bradbury D., Dunzik-Gougar M. L., Fachinger J., Hand R., Jones A., Karlina O., Kascheev V., Lamouroux C., Laurent G., Leganes Nieto J. L., Li J. F., Lindberg M., Metcalfe M. P., Narkūnas E. [LEI], Norris S., Ojovan M. I., Oryšaka A., Petit L., Poškas P. [LEI], Rahmani L., Tomlinson T., von Lensa W., Wickham A. J., Zlobenko B.. Processing of irradiated graphite to meet acceptance criteria for waste disposal In: IAEA TECDOC-1790. Vienna: International Atomic Energy Agency, 2016, p. 1-148. ISSN 1011-4289 ISBN 978-92-0-104016-9.

Scientific article


Narkūnas E. [LEI], Šmaižys A. [LEI], Poškas P. [LEI], Šimonis A. [LEI], Naumov V., Ekaterinichev D.. Gamma Radiation Shielding Assessment Using Stochastic, Deterministic, and Experimental Methods for RBMK-1500 SNF Storage Cask In: Nuclear Technology . Philadelphia: American Nuclear Society, 2022, Vol. 208, Iss. 12, p. 1876-1889. Scopus . ISSN 0029-5450 , eISSN 1943-7471.
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.


Šmaižys A. [LEI], Narkūnas E. [LEI], Poškas G. [LEI], Naumov V., Ekaterinichev D.. Evaluation of the shielding properties of a new increased capacity storage cask for RBMK-1500 used fuel In: Progress in Nuclear Energy. Oxford: Elsevier, 2021, Vol. 141, 103986, p. 1-11. ISSN 0149-1970, eISSN 1878-4224.
Narkūnas E. [LEI], Šmaižys A. [LEI], Poškas P. [LEI], Naumov V., Ekaterinichev D.. Neutron dose rate analysis of the new CONSTOR® storage cask for the RBMK-1500 spent nuclear fuel In: Nuclear Engineering and Technology. Daejeon: Elsevier, 2021, Vol. 53, p. 1869-1877. ISSN 1738-5733.


Narkūnas E. [LEI], Poškas G. [LEI], Šmaižys A. [LEI]. Impact of shield elements on the WWER-440 reactor pressure vessel activation In: Annals of Nuclear Energy. Oxford: Elsevier, 2019, Vol. 130, p. 394-401. ISSN 0306-4549.
Šmaižys A. [LEI], Narkūnas E. [LEI], Rudychev V., Rudychev Y.. Analysis of Some Computer Codes Used for Evaluation of Spent Nuclear Fuel Radiation Parameters In: Nuclear and Radiation Sofety. 2019, Vol. 3, No. 83, p. 44-50. ISSN 2073-6231.
Ahn S., Asghar M., Babesany B., Blideanu V., Boursie N., Narkūnas E. [LEI], et al. Methodologies for assessing the induced activation source term for use in decommissioning applications In: Safety Reports Series No. 95. Vienna: IAEA, 2019, No. 95, p. 128. ISSN 1020–6450 ISBN 978-92-0-102918-8.


Šmaižys A. [LEI], Poškas P. [LEI], Narkūnas E. [LEI]. Evaluation of dose rate variation during very long term storage of RBMK-1500 reactor used fuel In: Annals of Nuclear Energy. 2017, Vol. 109, p. 192-198. ISSN 0306-4549.


Ragaišis V. [LEI], Poškas P. [LEI], Šimonis V. [LEI], Narkūnas E. [LEI]. Updating of the public dose assessment approach for decommissioning related releases from the Ignalina NPP In: Annals of Nuclear Energy. Oxford, England: Elsevier, 2016, Vol. 94, p. 93-101. ISSN 0306-4549.

Conference paper


Narkūnas E. [LEI], Šmaižys A. [LEI], Poškas P. [LEI]. Preliminary inventory of C-14 in irradiated graphite of Ignalina NPP unit 1 RBMK-1500 reactor In: EURADWASTE ’19 Conference Proceedings 9th European Commission Conference on EURATOM Research and Training in Radioactive Waste Management 4-7 June, 2019 Pitesti, Romania . Luxembourg: European Union, 2020, p. 682. ISBN 978-92-79-98750-2.
Grigaliūnienė D. [LEI], Poškas P. [LEI], Kilda R. [LEI], Narkūnas E. [LEI]. Estimation of 14C release and migration from RBMK-1500 reactor graphite disposed of in a potential geological repository in crystalline rocks in Lithuania In: EURADWASTE ’19 Conference Proceedings 9th European Commission Conference on EURATOM Research and Training in Radioactive Waste Management 4-7 June, 2019 Pitesti, Romania. Luxembourg: European Union, 2020, p. 681. ISBN 978-92-79-98750-2.

International projects

Horizon Europe


The project aims to establish and clarify the benefits and added value of more aligned and harmonised regulations and standards for prioritised topics related to decommissioning and iMore

Horizon 2020

EURAD project logo

Following decades of RD&D in support of the safe management and disposal of radioactive waste, and building on the preparatory work of the recent EC JOPRAD project, a European JoiMore

Seventh Framework Programme (FP7)


The CAST project (CArbon-14 Source Term) aims to develop understanding of the generation and release of 14C from radioactive waste materials under conditions relevant to waste packagiMore


NEWLANCER project proposes to identify and implement effective and efficient actual solutions leading to enlarged NMS involvement in future Euratom Framework Programmes by strengtheniMore


Gas-Cooled Reactors (GCR), RBMK and some Material Test Reactors (MTR) make use of graphite as moderator of the fuel, structures of the core and/or thermal columns. During operation, tMore



The present spent nuclear fuel (SNF) management concept in the Lithuania foresees dry storage of SNF for 50 years. During this time the final SNF management concept shall be developedMore