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Inorganic Materials: Applied Research

, Volume 10, Issue 6, pp 1504–1509 | Cite as

A Mathematical Model of Radiation-Induced Shape Change in Fuel Subassemblies of the BN-Type Reactor Core and Its Implementation in the ANSYS Software Package

  • A. V. RyabtsovEmail author
  • O. Yu. Vilensky
SIMULATION OF MATERIALS AND TECHNOLOGICAL PROCESSES

Abstract

One of the main operability criteria for fuel subassemblies (FSAs) in sodium-cooled fast reactor cores, i.e., the criterion of tolerable shape change in the hexagonal wrapper tube, is formulated. The equations that enable one to investigate the kinetics of the stress-strain state of a three-dimensional body have been adapted to operating conditions of the FSAs. A mathematical model of radiation-induced shape change in ferritic-martensitic EP-450 grade steel is proposed. With regard to the proposed model and data on the radiation-induced shape change in other currently used and prospective BN reactor core structural materials, blocks for recording radiation-induced swelling and radiation-induced creep were developed for the ANSYS software package, which made it possible to utilize its potential in this area. The test case with the proposed models of the radiation-induced swelling and creep demonstrates that the developed blocks describe sufficiently well the radiation-induced shape change in the examined structural materials exposed to radiation. Calculation of the radiation-induced shape change in the FSA hexagonal wrapper tube has been performed at various radiation-induced swelling rates and radiation-induced creep moduli. The calculated results and the results of post-irradiation inspection of the FSA dimensions are compared. Recommendations for use of the proposed models designed to calculate and estimate the radiation-induced shape change and define the stress-strain state of the FSAs are made.

Keywords:

radiation-induced swelling radiation-induced creep mathematical model numerical computation analytical solution test case comparison 

Notes

REFERENCES

  1. 1.
    Kaidalov, V.B., Lapshin, D.A., Ryabtsov, A.V., and Iskhakov, S.A., Computational simulation of radiation-induced shape change in fuel assemblies of the BN-type reactors, Probl. Prochn. Plast., 2013, vol. 75, no. 1, pp. 33–39.Google Scholar
  2. 2.
    Zabud’ko, L.M., Likhachev, Yu.I., and Proshkin, A.A., Rabotosposobnost’ TBS bystrykh reaktorov (Performance of FSA Fast Reactors), Moscow: Energoatom-izdat, 1988.Google Scholar
  3. 3.
    Kapustin, S.A., Gorokhov, V.A., Vilenskii, O.Yu., Kaidalov, V.B., Margolin, B.Z., and Buchatskii, A.A., Modeling of the stressed-strained state of stainless steel constructions used under intensive thermal-radiation loading, Probl. Prochn. Plast., 2007, no. 69, pp. 106–116.Google Scholar
  4. 4.
    Chuev, V.V., Behavior of construction materials in neutron flow of high-power fast reactor, Extended Abstract of Doctoral (Eng.) Dissertation, Obninsk: Inst. Phys. Power Eng., 2007.Google Scholar
  5. 5.
    Dvoryashin, A.M., Porollo, S.I., Konobeev, Yu.V., and Garner, F.A., Effect of the high dose neutron irradiation on the structure of ferrite-martensite EP-450 steel, Materialy 7-i Rossiiskoi konferentsii po reaktornomu materialovedeniyu (Proc. Seventh Russ. Conf. on Reactor Material Science), Dimitrovgrad, 2003, pp. 45–60.Google Scholar
  6. 6.
    Borodin, O.V., Bryk, V.V., Voevodin, V.N., et al., Radiation swelling of the EP-450 and NT-9 ferritic-martensitic steels under metallic ion irradiation to superhigh doses, Vopr. At. Nauki Tekh., Ser.: Fiz. Radiats. Povrezhdenii Radiats. Materialoved., 2011, no. 2 (97), pp. 10–15.Google Scholar
  7. 7.
    Vilensky, O.Yu. and Ryabtsov, A.V., Mathematical models for radiation swelling and radiation creep in the EP-450 wrapper-tube steel for fuel subassemblies of a sodium-cooled fast reactor core, Vopr. At. Nauki Tekh., Ser.: Yad. Konstanty, 2017, no. 3, pp. 199–207.Google Scholar

Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  1. 1.AO OKBM AfrikantovNizhny NovgorodRussia

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