PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY
Series: Nuclear and Reactor Constants

since 1971

Русский (РФ)

ISSN 2414-1038 (online)

COMPUTATIONAL  MODELING OF IRRADIATION EXPERIMENTS OF MOX AND MNIT FUEL USING SOFTWARE COMPLEX MCU-NR

EDN: EPGZKX

Authors & Affiliations

Romadinov A. M., Fedorov I. A., Yufereva V. A.
N.A. Dollezhal Research and Development Institute of Power Engineering, Moscow, Russia

Romadinov A.M. – Engineer 2nd Category. Сontacts: 1, bldg. 3, pl. Akademika Dollezhalya, Moscow, Russia, 107140. Tel.: +7 (919) 963-41-33; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Fedorov I.A. – Engineer 2nd Category.
Yufereva V.А. – Head of Group.

Abstract

Currently, R&D is underway in respect of the design of the fast reactor with a heavy liquid metal coolant and mixed nitride uranium-plutonium fuel with the implementation of a closed nuclear fuel cycle. To justify the safety of using the nitride fuel, verify codes, establish a balance of fission materials and fission products, accumulate potentially radiation-hazardous nuclides, appropriate experimental studies are required. In order to verify the MCU-NR precision code in terms of isotope kinetics and nuclear fuel burnup, computational simulation of irradiation of oxide nuclear fuel samples in the capillary tube in the BN-350 reactor and samples of mixed nitride uranium-plutonium fuel in the combined experimental fuel assembly in the BN-600 reactor was carried out. To justify the possibility of transferring the results of the error estimation of the concentration of actinides during the burnup of the mixed nitride fuel in the core in the spectrum of the BN-600 reactor (combined experimental fuel assembly, CEFA) to the lead-cooled reactor, a computational test of the burnup of CEFA fuel elements in the BREST-OD-300 reactor was developed. A computational study was carried out to justify the possibility of using a cell model in calculating burnup and isotope kinetics in fast reactors. A comparative analysis of the results of calculating the burnup of nuclear fuel in a full-scale model of a fast reactor with a heavy liquid metal coolant and mixed nitride uranium-plutonium fuel and in the corresponding cell models was carried out. In the course of computational simulation of irradiation of nuclear fuel samples in fast reactors at rated power, maximum errors of calculation of nuclide composition change using the MCU-NR code were determined.

Keywords
computational modeling, irradiation experiments, verification, MNIT fuel, MOX fuel, isotopic kinetics, nuclear fuel burnup, precision code, Monte Carlo method

Article Text (PDF, in Russian)

References

UDC 621.039.51

Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2026, no. 1, 1:8