The Concept of a Fast Pulsed Reactor IBR-4

Publications, 28 July 2020

We are glad to bring to your attention a new preprint «The Concept of a Fast Pulsed Reactor IBR-4» P13-2020-14 published by the JINR Publishing Department. The authors are Yu. N. Pepelyshev, A. V. Vinogradov, A. D. Rogov, S. F. Sidorkin.


The high-flow pulse reactor operating in the Laboratory of Neutron Physics IBR-2М with a neutron flux density of ∼ 1013 cm-2 · s-1 by the end of the 2030s will be exhausted and will be stopped. The main drawback is the need to undertake significant development work with significant financial costs and difficulty to predict final results. As an alternative to the above-mentioned proposals, the concept of a neutron source is given in the work, the essence of which is that the source should be feasible, reliable and safe with minimal development and financial costs. These conditions involve the full use of technical solutions already ready and tested at other nuclear facilities. As a basis for further consideration, a brief conceptual description of such a source, a pulse reactor of periodic action IBR-4, is provided.

The investigation has been performed at the Frank Laboratory of Neutron Physics.

Fig. 6. General scheme of the IBR-4 reactor vessel with a moving reflector

Fig. 10 and 11. Two schemes of neutron beams output to IBR-4