CALCULATED AND EXPERIMENTAL DATA ON ENERGY RELEASE PROFILE IN THE FUEL ASSEMBLY OF THE IVG.1M REACTOR AFTER FUEL ENRICHMENT REDUCTION

Prior to the commissioning of the IVG.1M reactor with low-enriched uranium fuel, experimental studies of reactor characteristics were carried out on physical and energy start-ups, which should confirm the results of preliminary computational studies and the operability of the reactor. This article is devoted to the study of the axial and radial energy release profile in the IVG.M reactor fuel assemblies using in-reactor dosimetry techniques. The experimental results are compared with the results of neutron-physical simulations. The obtained energy release irregularity coefficients can be used in further thermo-technical calculations.

1. Zaytsev D.A., Repnikov V.M., Soldatkin D.M., Solntsev V.A. Studies of behavior of the fuel compound based on the U-Zr micro-heterogeneous quasialloy during cyclic thermal tests // Journal of Physics: Conference Series. – 2017. – Vol. 891(1). https://doi.org/10.1088/1742-6596/891/1/012181

2. Zhagiparova L.K., Vurim A.D., Kotov V.M., Pakhnits A.V., Irkimbekov R.A., Baygozhina A.A., Murzagalieva A.A., Vityuk G.A. Modelirovanie reaktora IVG.1M // Vestnik NYaTs RK. – 2017. – Issue 3. – P.59-64.

3. R.R. Sabitova, I.V. Prozorova, R.A. Irkimbekov, Yu.A. Popov, S.V. Bedenko, A.A. Prozorov, A.K. Mukhamediyev Methods to study power density distribution in the IVG.1M research reactor after conversion // Applied Radiation and Isotopes. – 2022. – Vol. 185, 110259.

4. Kazanskiy Yu.A., Matusevich E.S. Eksperimental'nye metody fiziki reaktorov: Ucheb. posobie dlya vuzov – Moscow: Energoatomizdat. – 1984. – 272 p.

5. Lomakin S.S. Yaderno-fizicheskie metody diagnostiki i kontrolya aktivnykh zon reaktorov AES: Ucheb. posobie dlya vuzov. – Moscow: Energoatomizdat. – 1986. – 120 p.

6. Irkimbekov R.A., Zhagiparova L.K., Kotov V.M., Vurim A.D., Gnyrya V.S. Neytronno-fizicheskaya model' reaktora IVG.1M: razrabotka i verifikatsiya po kriticheskomu sostoyaniyu // Atomnaya energiya. – 2019. – Tom 127, No. 2. – P. 63–69.