ANALYSIS OF THERMAL STATE OF A WCTC-LEU FUEL ELEMENT OF THE IVG.1M REACTOR WHEN FUEL KERNEL SEPARATING FROM THE CLADDING

This article presents an analysis of thermal state of a fuel element of the WCTC-LEU of the IVG.1M reactor implemented for a case when a fuel matrix is separated from the fuel cladding along a short side of the blade. Technology of a fuel element manufacture for the modernized core considers presence of non-uniformity in microstructure. To evaluate how separations of a typical size affects the thermal mode of fuel element operation, temperature fields in cross-sections of the fuel element have been calculated. Thermophysical calculations were conducted using the finite element method with ANSYS program complex. Based on the variants calculation, it was obtained data on the effect of the separation on temperature field distribution of the fuel element during the IVG.1M reactor running at design and nominal power.

1. Vodookhlazhdaemyy tekhnologicheskiy kanal (VOTK): poyasnitel'naya zapiska k tekhnicheskomu proektu. – NII NPO Luch, 1987. – 124 p. – R837PZ. – inv. No. 1612.

2. Kompleks issledovatel'skikh reaktorov “Baykal-1”. Issledovatel'skiy reaktor IVG.1M: otchet po analizu bezopasnosti. (AK.65000.01.966D) / DGP IAE RGP NYaTs RK. – Kurchatov, 2013.

3. Prozorova, I.V. Puti modernizacii kanal'nogo issledovatel'skogo reaktora IVG.1M / I.V. Prozorova // Izvestiya Tomskogo Politekhnicheskogo Universiteta. – 2012. – T. 321. – № 2. – pp. 42–47.

4. Reaktor IVG.1M: oficial'nyj sajt RGP NYaC RK. http://www.nnc.kz/facilities/ivg1m.html

5. Laura Gil. Countries Move Towards Low Enriched Uranium to Fuel Their Research Reactors // IAEA Bulletin. – November, 2019. – Vol. 60-4, pp. 26–27.

6. Ganzhur O., «133 uranovye niti – NPO «Luch» sozdalo innovacionnoe toplivo» : otraslevoe izdanie goskorporacii “Rosatom”. – 2020. http://strana-rosatom.ru/2020/01/20/133-uranovye-niti-npo-luch-sozdalo-inn/

7. Kanal vodoohlazhdaemyj tekhnologicheskij s nizkoobogashchennym toplivom (VOTK-NOU) VShKL.506413. 002PZ: poyasnitel'naya zapiska k tekhnicheskomu proektu. – FGUP «NII NPO LUCH». – Podol'sk, 2021

8. ANSYS release 2021 R2. Documentation for ANSYS WORKBENCH: ANSYS Inc. – 2021.

9. Aleksandrov A.A., Teplotekhnika: uchebnik dlya VUZov / A.A. Aleksandrov, A.M. Arharov, I.A. Arharov i dr. – 5-e izd., Moscow: Izdatel'stvo MGTU im. N.E. Baumana, 2017.

10. Kanal vodookhlazhdaemyy tekhnologicheskiy s nizkoobogashchennym toplivom (VOTK-NOU) VShKL. 506413.002RE: rukovodstvo po ekspluatatsii. – FGUP “NII NPO LUCH”. – Podol'sk, 2020.

11. Thermophysical Properties of Materials for Nuclear Engineering: A Tutorial and Collection of Data / INTERNATIONAL ATOMIC ENERGY AGENCY. – Vienna, 2008.

12. 12 Rivkin, S.L. Termodinamicheskie svoystva vody i vodyanogo para / S.L. Rivkin, A.A. Aleksandrov. – Moscow: Energoatomizdat, 1984.