Numerical Simulation of Irradiation Induced Precipitates in Low Copper RPV Steels Based on Cluster Dynamics

被引：0
|
作者：
Wang X. [1 ,2 ]
Yao W. [2 ]
Luo Y. [1 ,2 ]
Dong Y. [1 ,2 ]
机构：
[1] Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu
[2] Nuclear Power Institute of China, Chengdu
来源：
Hedongli Gongcheng/Nuclear Power Engineering | 2020年 / 41卷
关键词：
Cluster dynamics; Irradiation damage; Mn-Ni-Si precipitates; Reactor pressure vessel;
D O I：
10.13832/j.jnpe.2020.S1.0188
中图分类号：
学科分类号：
摘要：
Irradiation induced defects such as matrix damage and solute atom precipitates are the main causes of irradiation embrittlement. Based on the reaction rate theory, a cluster dynamics model considering multiple nucleation mechanisms of Mn-Ni-Si precipitates is established, and the generation of irradiation induced defects, the irradiation dose dependence of mean size, number density of Mn-Ni-Si precipitates and dislocation loops in low-copper RPV steels are simulated. The comparative analysis with experimental data shows that the modified cluster dynamics model considering both the precipitates formation mechanism of interstitial dislocation loops domination and vacancy cluster domination can better simulate the irradiation damage behavior of materials. On this basis, the sensitivity analysis of the irradiation parameters shows that the effect of the neutron flux on the irradiation induced precipitates is related to the neutron fluence, the larger the irradiation flux is, the less the precipitates will be generated at low fluence, and the more the precipitates will be at high fluence. Further more, the precipitates is more likely to be produced at lower temperature. © 2020, Editorial Board of Journal of Nuclear Power Engineering. All right reserved.
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页码：188 / 193
页数：5
相关论文
共 12 条
  • [1] KE H, WELLS P, EDMONDSON P D, Et al., Thermodynamic and kinetic modeling of Mn-Ni-Si precipitates in low-Cu reactor pressure vessel steels, Acta Materialia, 138, pp. 10-26, (2017)
  • [2] WELLS P B, YAMAMOTO T, MILLER B, Et al., Evolution of manganese-nickel-silicon-dominated phases in highly irradiated reactor pressure vessel steels, Acta Materialia, 80, pp. 205-219, (2014)
  • [3] SHIMODAIRA M, TOYAMA T, YOSHIDA K, Et al., Contribution of irradiation-induced defects to hardening of a low-copper reactor pressure vessel steel, Acta Materialia, 155, pp. 402-409, (2018)
  • [4] YOSHIIE T, KINOMURA A, NAGAI Y., Reaction kinetic analysis of reactor surveillance data, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 393, pp. 97-100, (2017)
  • [5] ODETTE G R., Radiation induced microstructural evolution in reactor pressure vessel steels, MRS Online Proceedings Library Archive, 373, pp. 137-148, (1994)
  • [6] LAMBRECHT M, MALERBA L, ALMAZOUZI A., Influence of different chemical elements on irradiation-induced hardening embrittlement of RPV steels, Journal of Nuclear Materials, 378, 3, pp. 282-290, (2008)
  • [7] GLADE S C, WIRTH B D, ODETTE G R, Et al., Positron annihilation spectroscopy and small angle neutron scattering characterization of nanostructural features in high-nickel model reactor pressure vessel steels, Journal of Nuclear Materials, 351, 1-3, pp. 197-208, (2006)
  • [8] HINDMARSH A C, BROWN P N, GRANT K E, Et al., Sundials: Suite of nonlinear and differential/algebraic equation solvers, ACM Transactions on Mathematical Software (TOMS), 31, 3, pp. 363-396, (2005)
  • [9] EDMONDSON P D, PARISH C M, NANSTAD R K., Using complimentary microscopy methods to examine Ni-Mn-Si-precipitates in highly-irradiated reactor pressure vessel steels, Acta Materialia, 134, pp. 31-39, (2017)
  • [10] BACON D J, RUBIA T D D L., Molecular dynamics computer simulations of displacement cascades in metals, Journal of Nuclear Materials, 216, pp. 275-290, (1994)
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