Authors & Affiliations
Matveev E.L., Nedaivozov A.V., Tutukin A.V., Cherkasova M.S.
N.A. Dollezhal Research and Development Institute of Power Engineering, Moscow, Russia
Matveev E.L. – Chief Expert, Acting Head of Department, Cand. Sci. (Phys.-Math.). Contacts: 1, building 3, pl. Academician Dollezhal, Moscow, Russia, 107140. Tel.: +7 (499) 763-01-14; e-mail:
Nedayvozov A.V. – Senior Researcher, Cand. Sci. (Tech.).
Tutukin A.V. – Chief Specialist, Acting Head of Department.
Cherkasova M.S. – Researcher, N.A. Dollezhal Research and Development Institute of Power Engineering.
Numerical modeling of the change in physical parameters (temperature and relative humidity) of the steam-gas mixture in the event of a leak (in three locations of leak occurrence with a mass flow rate in the range from 114 to 1140 kg/h, in accordance with the requirements for leak monitoring systems as per GOST R 58328) in the space underneath insulation of the secondary loop pipeline sections of the BREST-OD-300 reactor plant was carried out. Simulation of dynamics of the physical quantities under study during accident was performed using the ANSYS Fluent 2019 R3 program code in the RANS setting. In the course of the study, 32 calculations were performed, including two steady state calculations for each system — live steam and feedwater. Based on the modeling results, it can be concluded that within the first 20 minutes from the moment of leak occurrence in the space underneath insulation of the pipeline there is a significant change in the steady state. Also, due to gaps between thermal insulation sheets, the steam-gas mixture leaks into the room, which makes a significant contribution to the speed of steam propagation underneath thermal insulation.
Keywords
secondary loop pipelines, BREST-OD-300 reactor plant, accident with steam-gas mixture leak, leak, space underneath insulation, numerical modeling, measuring channel, primary transducer, methodological aspects, calculation results
Article Text (PDF, in Russian)
UDC 621.039-78
Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2024, no. 2, 2:22