DDORNT: Department for Nuclear Power Plants Decommissioning

24.09.201809.02.2022 Vadim

Head of the Department, Ph. D. (Sci.)

Valerii Derengovskyi

After graduation with honor from Taras Shevchenko University of Kyiv in 1995, Valerii Derengovskyi was qualified as “mathematician”. In addition, in 1995 he received an additional degree in radioecology at the Ukrainian Radiological Training Center and started to work as a methodologist at the training center of the Department of Information and International Cooperation of the Research and Production Association “Prypiat”. After the reorganization of the department, it became the Agency for Information, International Cooperation and Development “Chornobylinterinform”, in which as of 1998 he held the position of Deputy Head of Analytical Information of the Information and Publishing Center. During his work at the ISP NPP, he went from a junior researcher to the head of the department. Valerii Derengovskyi successfully studied at the Abdus Salam International Research Center in Trieste (Italy), performed research work on the program of National Scholarships of the World Federation of Scientists. In 2019 he defended his thesis “Improved method of multicriteria analysis of the environmental safety of facilities with radiation and nuclear technologies” and received the Ph. D. degree in “Environmental Safety”. Valerii Derengovskyi is the author of one monograph and 40 scientific publications.

Activity of the Nuclear Power Plants Decommissioning Department covers the following tasks:

study of the experience of NPP decommissioning in the world. Development of recommendations on different types and strategies of decommissioning, protection of personnel, population and the environment in the process of decommissioning of various nuclear fuel cycle facilities. Development of proposals for the decommissioning of the Chornobyl NPP, including the removal of fuel and the Shelter object transformation into an ecologically safe system;
development of materials of license reports necessary for approval of projects of different stages of NPP decommissioning, including safety analysis report, environmental impact assessment report, report on compliance with sanitary legislation;
development of recommendations on safe management of radioactive waste and spent nuclear fuel, scientific and technical support at the stage of construction, commissioning and operation of spent nuclear fuel storage facilities;
participation in international scientific conferences, workshops for experience exchange and approbation of the obtained results, as well as publication of articles in professional international and mational scientific editions of publications.

Working meeting on preparation of scientific report at the VI International Conference INUDECO-21. In the photo (on the left): O. A. Kaftanatina, Ye. A. Menshenin, S. M Bazelyuk, P. L. Kordyukov, V. V. Derengovskyi, S. V. Kupriyanchuk and I. S. Skiter (2021)

Main achievements of the NPP Decommissioning Department:

assessment of the environmental impacts as part of the project for the final closure and mothballing of Units no. 1, 2 and 3 of the Chornobyl NPP was carried out;
scientific and technical support of the design of the first NSC launch complex (LC-1 NSC) as part of the radioactive waste management during the construction and operation of the NSC was carried out;
recommendations on the structure and content of the RAW management program were developed during nuclear power plants decommissioning;
recommendations for improving the national system of radioactive waste management in the framework of the implementation of the international TACIS project “Development of a National Strategy and Concept for Radioactive Waste Management in Ukraine, including the Strategy for Radioactive Waste Management of NNEGC” Energoatom “” together with experts from leading western companies such as : DBE (Germany), ANDRA (France), COVRA (the Netherlands), SKB (Sweden), ENRESA (Spain) and NDA (Great Britain) were developed;
scientific and technical principles and technological solutions for the removal of FCM from the Shelter object using NSC systems and their subsequent management (sorting, containerization, certification, temporary storage) have been developed;
work on determination of the background levels of radiation parameters at the site of the SNFSF, as well as in its sanitary protection zone and surveillance zone before its operation was performed.

Three-dimensional simulation of the process of dismantling of a metal truss located on the southern shields of the Shelter object