EDN: OMNLHD
Authors & Affiliations
Kruglov A.B., Kharitonov V.S., Paredes L.P.
National Research Nuclear University (MEPhI), Moscow, Russia
Kruglov A.B. – Associate Professor, Cand. Sci. (Phys.-Math.). Contacts: 31, Kashirskoye sh., Moscow, Russia, 115409. Tel.: +7 (495) 788-56-99, +7 (909) 983-75-44; email: This email address is being protected from spambots. You need JavaScript enabled to view it., This email address is being protected from spambots. You need JavaScript enabled to view it..
Kharitonov V.S. – Associate Professor, Cand. Sci. (Tech.).
Paredes L.P. – Postgraduate Student.
Abstract
The article presents results of a study using the pulsed laser heating method of thermal resistances of liquid lead contacts in gaps simulating a heat-conducting liquid metal sublayer in fuel elements of new-generation fast reactors. The paper describes the designs of measuring cells, the methodology for obtaining and processing experimental data, provides information on the thermophysical properties of parts of the measuring cells, presents the results of estimating the measurement error, and studies the dependence of thermal resistances of liquid lead contacts in model gaps on the temperature and number of meltings and crystallizations of lead. When studying the wetting of steel and ceramic surfaces with lead and lead-sodium alloy, based on the results of measuring the contact angles using the sessile drop method, the measurements were performed during heating and subsequent cooling of the contacting pair. The results of the experiments showed that in the temperature range of 400–650 °C typical for the operation of the liquid metal heat-conducting sublayer, the thermal resistance of the contacts of the lead melt with the heat-transfer surfaces reaches 1·10–5 (m2·K)/W. Such thermal resistances must be taken into account when analyzing heat transfer in fuel elements with a liquid metal sublayer. The results of the wetting study showed the potential of using a lead-sodium alloy as a heat-conducting sublayer metal.
Keywords
fuel elements, heat-conducting sublayer, thermal resistance of the sublayer, pulse heating method, wetting in the sublayer, contact angle, sessile drop method
Article Text (PDF, in Russian)
References
- Troyanov V.M., Grachev A.F., Zabud’ko L.M. et al. Prospects for Using Nitride Fuel in Fast Reactors with a Closed Nuclear Fuel Cycle. At Energy, 2014, vol. 117, pp. 85–91. DOI: https://doi.org/10.1007/s10512-014-9893-1.
- Adamov E.O., Zabud’ko L.M., Mochalov Y.S. et al. Development of Fuel Pin with Uranium-Plutonium Nitride Fuel and Liquid-Metal Sublayer. At Energy, 2020, vol. 127, issue 5, pp. 280–287. DOI: https://doi.org/10.1007/s10512-020-00624-4.
- Kruglov A.B., Kruglov V.B., Struchalin P.G., Kharitonov V.S. et al. Thermal Conductivity of Pb-Mg-Zr Alloys and the Thermal Resistance of the Interface Between Alloys and EP-823 Steel in the Temperature Range of 300‑900 °C. Bulletin of the Lebedev Physics Institute, 2016, vol. 43, issue 10, pp. 302–305.
- Kruglov A.B., Kruglov V.B., Kharitonov V.S., Struchalin P.G. Metodika issledovaniya termicheskogo soprotivleniya kontakta zhidkogo metalla i teploperedayushchey poverkhnosti [Method for Studying the Thermal Resistance of a Contact Between a Liquid Metal and a Heat Transfer Surface]. Voprosy atomnoy nauki i tekhniki. Seriya: Yaderno-reaktornyye konstanty – Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2018, no. 4, pp. 141–146.
- Kruglov A.B., Rachkov V.I., Merinov I.G. et al. Thermal conductivity of lead in the temperature range of 350–1000 °C. Thermophys. Aeromech., 2022, vol. 29, issue 4, pp. 615–621. DOI: https://doi.org/
10.1134/S0869864322040138.
- Bobkov V.P., Fokin L.R., Petrov E.E., Popov V.V., Rumiantsev V.N., Savvatimsky A.I. Thermophysical properties of materials for nuclear engineering: a tutorial and collection of data. Ed. P.L. Kirillov. Vienna, IAEA, 2008. P. 88.
- Sobolev V. Database of thermophysical properties of liquid metal coolants for GEN-IV. Boeretang: SCK-CEN, 2010. Pp. 143–147.
- Tablitsy standartnykh spravochnykh dannykh. Stali 12KH18N9T i 12KH18N10T. Udel'naya teployemkost' i udel'naya ental'piya v diapazone temperatur 400–1380 K pri atmosfernom davlenii. GSSSD 32-82
[Tables of standard reference data. Steels 12Kh18N9T and 12Kh18N10T. Specific heat capacity and specific enthalpy in the temperature range of 400–1380 K at atmospheric pressure. GSSSD 32-82]. Moscow, Izd-vo standartov Publ., 1983. 9 p.
- Tablitsy standartnykh spravochnykh dannykh. Stal' nerzhaveyushchaya marki 12KH18N10T. Teploprovodnost' pri temperaturakh 340–1100 K. GSSSD 165-94 [Tables of standard reference data. Stainless steel grade 12X18N10T. Thermal conductivity at temperatures of 340–1100 K. GSSSD 165-94]. Moscow, Izd-vo standartov Publ., 1994. 10 p.
- Tablitsy standartnykh spravochnykh dannykh. Molibden, monokristallicheskaya okis' alyuminiya, stal' 12KH18N10T. Temperaturnyy koeffitsiyent lineynogo rasshireniya. GSSSD 59-83 [Tables of standard reference data. Molybdenum, single-crystal aluminum oxide, steel 12X18N10T. Temperature coefficient of linear expansion. GSSSD 59-83]. Moscow, Izd-vo standartov Publ., 1984. 6 p.
- Kruglov A.B., Kruglov V.B., Struchalin P.G., Kharitonov V.S. Study of Thermophysical Properties of EP-823 Steel in the Temperature Range of 200–900 °C. Bulletin of the Lebedev Physics Institute, 2015, vol. 42, no. 9, pp. 264–267.
- Direktor L.B., Zaichenko V.M., Maikov I.L. An improved method of sessile drop for determining the surface tension of liquids. High Temp, 2010, vol. 48, issue 2, pp. 176–180. DOI: https://doi.org/10.1134/S0018151X10020069.
- Karmokov A.M., Dyshekova A.H., Molokanova O.O. Izmereniye krayevogo ugla smachivaniya svintsom poverkhnosti oksida zheleza i reaktornoy stali EI-852 [Measurements of the contact angle of lead for surfaces of the iron oxide and reactor steel EI-852]. Prikladnaya fizika – Applied Physics, 2017, no. 3, pp. 85–88.
UDC 621.311.25(6)
Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2024, no. 3, 3:14
