Smart Energy and Sustainable Environment , ISSN 2668-957X
2023, Volume 26, Issue 2
Pages 37-46


Mihaela Roxana Ene , Narcisa Ghimiş , Gheorghe Bulubașa , Alina Florentina Miu

National Research and Development Institute for Cryogenics and Isotopic Technologies - ICSI Rm. Valcea, Uzinei Street no. 4, PO Box Râureni 7, 240050, Râmnicu Vâlcea, Romania

*Corresponding author: Narcisa Ghimis, e-mail:

Received: 09.11.2023 Received in revised form 06.02.2024 Accepted 23.02.2024 Available online: 23.02.2024 24th International Conference "New Cryogenic and Isotopic Technologies for Energy and the Environment", EnergEn2023, 18-20 October 2023, Baile Govora, Romania


The paper presents a monitoring activity of the Freshwater fish (Carassius gibelio) samples consumed in Olt River, Romania. A monitoring study lasting 9 years (2014-2022) was realized. Two sampling points for the Olt River were chosen, the first one upstream of the discharge point of the magistrate channel “Deversor Olt” (background location) and respectively the second sampling point downstream of the liquid effluents discharge point (indicator location).

A maximum activity concentration for40K of 95.75 Bq∙kg-1 fw, is observed. The activity of interest radionuclides (7Be, 51Cr, 60Co, 137Cs, 226Ra, 235U) is below the detection limit. The method used was high resolution gamma ray spectrometry performed with an HPGe detector.

It was observed that the values recorded for the background location had a slight difference compared with the values recorded in the indicator locations. The nuclear activity in the pre-operational stage of the Experimental Pilot Plant for Tritium and Deuterium Separation did not have any impact on the environment so far.

This study creates a unique database that could be relevant for further Operational Program for Environmental Monitoring of the Experimental Pilot Plant and other economical agents in the area.


Baltas Hasan, Erkan Kiris, Murat Sirin, 2017, Determination of radioactivity levels and heavy metal concentrations in seawater, sediment and anchovy (Engraulis encrasicolus) from Black Sea in Rize, Turkey, Marine Pollution Bulletin, 116 (1-2), 528-533.

ICRP, 1996. Age-depended doses to members of the public from intake of radionuclides: part 5 Compilations of Ingestion and Inhalation Dose Coefficient, ICRP Publications 72

Ilham Al-Qaradawi, Mohamed Abdel-Moati, Mohsin Al-Ansi Al-Yafei, Ebrahim Al-Ansari, Ibrahim Al-Maslamani, Elis Holm, Ismail Al-Shaikh, Alexander Mauring, Primal V. Pinto, Dana Abdulmalik, Amina Amir, Mark Miller, Oguz Yigiterhan, Bertil Persson, 2015, Radioactivity levels in the marine environment along the Exclusive Economic Zone (EEZ) of Qatar, Marine Pollution Bulletin, 90 (1-2), 323-329

ISO 11929-1, Determination of the characteristic limits (decision threshold, detection limit and limits of the coverage interval) for measurements of ionizing radiation — Fundamentals and application — Part 1: Elementary applications

  1. Chen, W. Zhang, B. Sadi, 2015, Letter to the Editor, A report of radioactivity measurements of freshwater fish samples from the National Capital Region of Canada, Journal of Environmental Radioactivity, 144, 175-178.
  2. Chen, M. D. Rennie, B. Sadi, W. Zhang, N. St-Amant, 2016, A study on the levels of radioactivity in fish samples from the experimental lakes area in Ontario, Canada, Journal of Environmental Radioactivity, 153, 222-230.


  1. Korkmaz Görür, R. Keser, N. Akcay, S. Dizman, 2012, Radioactivity and heavy metal concentrations of some commercial fish species consumed in the Black Sea Region of Turkey, Chemosphere, 87 (4), 356-361.

Andrew J. Pearson, Sally GawNikolaus HermanspahnChris N. Glover,  2016, Activity concentrations of 137Caesium and 210Polonium in seafood from fishing regions of New Zealand and the dose assessment for seafood consumers, Journal of Environmental Radioactivity, 151 (3), 542-550.

Raluca Popescu, Tanja Mimmo, Oana Romina Dinca, Calogero Capici, Diana Costinel, Claudia Sandru, Roxana Elena Ionete, Ioan Stefanescu, Damian Axente, 2015, Using stable isotopes in tracing contaminant sources in an industrial area: A case study on the hydrological basin of the Olt River, Romania, Sciente of the Total Environment, 533, 17-23

UNSCEAR, 2000. United Nations Scientific Committee on the Effects of atomic Radiation. Sources, Effects and Risks of Ionizing Radiation, United Nations, New York.

Toshihiro Wada, Alexei Konoplev, Yoshifumi Wakiyama, Kenji Watanabe, Yuma Furuta, Daigo Morishita, Gyo Kawata, Kenji Nanba, 2019, Strong contrast of cesium radioactivity between marine and freshwater fish in Fukushima, Journal of Environmental Radioactivity, 204, 132-142.


radioactivity; freshwater fish; gamma spectrometry; environment

Tag search radioactivity freshwater fish gamma spectrometry environment