Series: Nuclear and Reactor Constants

since 1971

Русский (РФ)

ISSN 2414-1038 (online)

Authors & Affiliations

Kosуakin D.A., Korobeinikov V.V., Stogov V.Yu.
A.I. Leypunsky Institute for Physics and Power Engineering, Obninsk, Russia

Korobeinikov V.V. – Chief Researcher, Dr. Sci. (Phys.-Math.), professor. Contacts: 1, Sq. Bondarenko, Obninsk, Kaluga region, Russia, 249033. Tel.: +7 (484) 399-82-76; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Kosуakin D.A. – Engineer.
Stogov B.Yu. – Senior Researcher.


The management of radioactive waste (RW) from nuclear energy is one of the key issues that determine the acceptability and scale of development of this industry of energy production. Spent nuclear fuel (SNF) poses a threat to the environment when released from storage facilities. Currently, the problem of reliable isolation and neutralization of radioactive waste attracts great attention. It is clear that a full-scale demonstration of the technology of reliable disposal of radioactive waste for hundreds of thousands and millions of years is impossible, if we take into account the manifestation of such unlikely factors as a change in the state of the earth's crust or a large meteorite falling into a repository. Therefore, it is believed that the best way to solve the problem of radioactive waste is their neutralization. Of particular difficulty in solving this problem are minor actinides (MA) contained in SNF.
A radical reduction in the volume of MA contained in the SNF of power reactors is possible due to their transmutation – the conversion of long-lived radioactive isotopes into short-lived ones, or stable ones when they are irradiated in nuclear reactors. However, the difference in MA properties, characteristics of various types of nuclear reactors, and transmutation methods requires a comprehensive assessment and choice of ways to handle both individual nuclides – Np-237, Am, Cm, and the development of a common position on the methods for implementing MA transmutation.
Existing studies are mainly aimed at assessing the possibility and prospects for the utilization of minor actinides in existing and planned types of reactors. However, the final choice of a transmutation facility has not yet been made in any country in the world, and an effective solution to this problem is still ahead.
A feature of this work is the study of the dependence of the efficiency of Am-241 transmutation on the energy structure of the neutron flux spectrum. The results of the study will make it possible to determine the spectral conditions under which the efficiency of transmutation will be maximum. After choosing suitable spectral conditions, it will be possible to proceed to their implementation in existing or prospective nuclear reactors.

transmutation, minor actinides, spent fuel, radioactivity, biological hazard, spent fuel storage, neutron spectrum

Article Text (PDF, in Russian)


UDC 621.039.54(04)

Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2022, issue 1, 1:1