Authors & Affiliations

Dmitriev S.M., Dobrov A.A., Doronkov D.V., Khrobostov A.E., Legchanov M.A., Pronin A.N., Ryazanov A.V., Solntsev D.N., Sorokin V.D.
Nizhniy Novgorod State Technical University n.a. R.E. Alekseev, Nizhniy Novgorod, Russia

Dmitriev S.M. – Rector, Dr. Sci.(Tech.), Professor, Institute of Nuclear Power Engineering and Technical Physics, Nizhny Novgorod State Technical University. R.E. Alekseeva.
Dobrov A.A. – Senior Lecturer, Institute of Nuclear Power Engineering and Technical Physics, Nizhny Novgorod State Technical University. R.E. Alekseeva.
Doronkov D.V. – Senior Lecturer, Institute of Nuclear Power Engineering and Technical Physics, Nizhny Novgorod State Technical University. R.E. Alekseeva.
Khrobostov A.E. – Director, Cand. Sci. (Tech.), Institute of Nuclear Power Engineering and Technical Physics, Nizhny Novgorod State Technical University. R.E. Alekseeva.
Legchanov M.A. – Deputy Director for Science and Innovation, Cand. Sci. (Tech.), Institute of Nuclear Power Engineering and Technical Physics, Nizhny Novgorod State Technical University. R.E. Alekseeva.
Pronin A.N. – Senior Lecturer, Institute of Nuclear Power Engineering and Technical Physics, Nizhny Novgorod State Technical University. R.E. Alekseeva. Contacts: 24, Minina st., Nizhny Novgorod, Russia, 603155. Tel.: +7(831)436-80-17; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Ryazanov A.V. – Engeneer of the 2nd category, Institute of Nuclear Power Engineering and Technical Physics, Nizhny Novgorod State Technical University. R.E. Alekseeva.
Solntsev D.N. – Associate Professor, Cand. Sci. (Tech.), Institute of Nuclear Power Engineering and Technical Physics, Nizhny Novgorod State Technical University. R.E. Alekseeva.
Sorokin V.D. – Engeneer, Institute of Nuclear Power Engineering and Technical Physics, Nizhny Novgorod State Technical University. R.E. Alekseeva.

Abstract

The paper is devoted to experimental studies of the local hydrodynamic characteristics of the coolant flow in the fuel assembly. This type of fuel assemblies will be used in the reactor units for new generation icebreakers. The investigations consisted in studying the distribution of the relative axial velocities along fuel assembly cells behind the input section, moreover in determining the values of the hydraulic resistance coefficients of the inlet section of the fuel assembly and its individual elements. The research stand is aerodynamically open circuit. The test model is a fuel assembly fragment and includes an input section and a section of the active part up to the first spacing grid. The Pitot-Prandtl pneumometric tube was used to study the field of axial velocities. As a result of the conducted studies, the distribution of relative axial velocities across cells in several sections from the entrance to the active part to the first spacer grid was determined. Moreover the influence that the design features of the input section have on the distribution of relative axial velocities was revealed. Also the values of the hydraulic resistance coefficients of the entire input section of the fuel assembly as a whole, as well as its individual elements was determined.

Keywords
nuclear reactor, mixing processes, coolant, spatial conductometry, computational fluid dynamics, CFD code

Article Text (PDF, in Russian)

References

UDC 621.039

Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants", 2018, issue 3, 3:19