Ivanov K.D., Niyazov S.-A.S.
A.I. Leypunsky Institute for Physics and Power Engineering, Obninsk, Russia
During development of computational methods that describe the behavior of structural steels in contact with heavy liquid-metal coolants (HLMC) based on lead, the task of their constant ensuring arises. Such constant base can be obtained by appropriate processing, systematization and analysis of experimental data. Throughout this process, a number of problems and complexities arise, the main cause of which is the multiple-factor nature of the connectivity between the results of the experiment and the experimental conditions.
A brief analysis of the state of art of the problem of describing the processes of oxidation of structural steels in HLMC, as well as the main difficulties encountered in the processing, systematization and analysis of experimental data, is given in this paper. Among them are the following problems:
- the problem of the loss accounting of steel components in a liquid metal coolant;
- the problem of take of accounting for the main conditions of structural steels oxidation (time, temperature and oxygen conditions of the coolant);
- the problem of accounting for a possible change the oxidation mechanism over time;
- the problem of taking into account the initial state of the oxidized surface.
The possible ways of solving these problems are illustrated and instantiated.
1. Wagner C. Theoretical Analysis of the Diffusion Processes Determining the Oxidation Rate of Alloys. Journal of the Electrochemical Society, 1952, vol. 99, no. 10, pp. 369-380.
2. Efremov A.P. Khimicheskoe soprotivlenie materialov [Chemical resistance of materials]. Moscow, Oil and gas Publ., 2004. Pp. 27-32.
3. Handbook on Lead-bismuth Eutectic Alloy and Lead Properties, Materials Compatibility, Thermal-hydraulics and Technologies. ISBN 978-92-64-99002-9. P. 249-270.
4. Niyazov S.-A.S., Ivanov K.D., Lavrova O.V. Rezul'taty chislennykh otsenok poter' komponentov konstruktsionnykh staley v tyazhelykh teplonositelyakh [Results of numerical evaluations of structural steel elements losses in heavy coolants]. Trudy 4 konf. "Tyazhelye zhidkometallicheskie teplonositeli v yadernykh tekhnologiyakh (TZhMT-2013)" [Proc. 4th Conf. “Heavy Liquid Metal Coolants in Nuclear Technologies (HLMC-2013)”]. Obninsk, 2013, pp. 82.
5. Tedmon C.S. The High-Temperature Oxidation of Fe-Cr Alloys in the Composition Range of 25–95% Cr. Journal of the Electrochemical Society, 1967, vol. 114, no. 8, pp. 788-795. doi:10.1149/1.2426737.
6. Zhang J., Li N. Improved Application of Local Models to Steel Corrosion in Lead-Bismuth Loops. Nuclear Technology, 2003, vol. 144, no. 3, pp. 379-387.
7. Steiner H., Schroer C., Vob Z., Wedemeyer O., Konys J. Modeling of oxidation of structural materials in LBE systems. Journal of Nuclear Materials, 2008, vol. 374, pp. 211-219.
8. Zhang J., Li N. Oxidation mechanism of steels in liquid lead alloys. Oxidation of Metals, 2005, vol. 63, no. 5-6, pp. 353–381.
9. Ivanov K.D., Lavrova O.V., Yudintsev P.A., Niyazov S.-A.S. Metodika otsenki intensivnosti potrebleniya kisloroda konstruktsionnymi stalyami pervogo kontura YaEU s tyazhelymi teplonositelyami [The method of estimating the intensity of oxygen consumption of structural steel in the primary circuit of NPP with heavy coolants]. Novye promyshlennye tekhnologii - New industrial technology, 2011, no. 1, pp. 51-55.
10. Askhadullin R.Sh., Ivanov K.D., Shelemetev V.M., Sadovnichy R.P. Otsenka intensivnosti protsessov okisleniya konstruktsionnykh staley pervogo kontura YaEU s tyazhelymi teplonositelyami [Estimatin of intensity of consumption of oxygen constructional steells of primary coolant circuit power reactor facility with heave-carriers]. Izvestiya vuzov. Yadernaya energetika - Proseedings of Universities. Nuclear Power Engineering, 2011, no. 4, pp. 121-129.
11. Niyazov S.-A.S., Ivanov K.D., Lavrova O.V. Vliyanie predvaritel'noy podgotovki poverkh-nosti konstruktsionnykh staley na kinetiku ikh okisleniya v tyazhelykh teplonositelyakh [Influence of pre-surface preparation of structural steel on the kinetics of oxidation in heavy coolants]. Trudy 4 konf. "Tyazhelye zhidkometallicheskie teplonositeli v yadernykh tekhnologiyakh (TZhMT-2013)" [Proc. 4th Conf. “Heavy Liquid Metal Coolants in Nuclear Technologies (HLMC-2013)”]. Obninsk, 2013, pp. 40.
12. Ivanov K.D., Martunov P.N. Niyazov S.-A.S., Lavrova O.V., Ulianov V.V., Shelemetev V.M., Sadovnichy R.P., Fomin A.S. Vliyanie predvaritel'noy podgotovki poverkhnosti stali na skorost' ee okisleniya v svintsovo-vismutovom teplonositele [Effect of pre-treatment on the oxidation rate steel in the lead-bismuth coolant]. Izvestiya vuzov. Yadernaya energetika - Proseedings of Universities. Nuclear Power Engineering, 2012, no. 4, pp. 122-129.
13. Kashtanov A.D. Razrabotka i obosnovanie rekomendatsiy dlya vybora konstruktsionnykh staley teploobmennogo oborudovaniya reaktorov na bystrykh neytronakh s tyazhelymi teplonositelyami. Diss. kand. tekh. nauk [Development and justification of recommendations on the choice of structural steels for heat exchangers of fast reactors with heavy coolants. Cand. tech. sci. diss.]. St. Petersburg, 2010.
14. Ivanov K.D., Niyazov S.-A.S., Lavrova O.V., Salaev S.V. Askhadullin R.Sh. Razrabotka metodiki opredeleniya skorosti okisleniya konstruktsionnykh staley v tyazhelykh zhidkometallicheskikh teplonositelyakh [Development of the technique for determination the rate of oxidation of structural steels in heave liquid metal coolants]. Izvestiya vuzov. Yadernaya energetika - Proseedings of Universities. Nuclear Power Engineering, 2017, no. 4, pp. 127-135.
