Abstract

A model is developed to describe the final stage of transient swelling of austenitic steels, at which vacancy pores do not form. The evolution of an ensemble of radiation pores is determined by the following two processes: the growth of vacancy pores due to an unbalanced vacancy influx and the coalescence of growing pores. The evolution of an ensemble of pores during long-term operation is estimated using the model and the results of transmission electron microscopy studies of irradiated Kh18N9 steel samples, which are made of the BN-600 reactor internals having operated for 22 and 33 years. Time dependences of the average size, the concentration, the integral surface of pores and the swelling during operation for up to 50 years are plotted.

中文翻译：

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在过渡溶胀的最终阶段使用模型预测在BN-600反应堆内部运行过程中Kh18N9钢的辐射诱导孔隙率

摘要

开发了一个模型来描述奥氏体钢瞬态溶胀的最终阶段，在该阶段不会形成空孔。辐射孔集合的演化由以下两个过程确定：由于空位涌入不平衡而导致的空位孔的生长以及生长孔的合并。使用该模型以及由BN-600反应堆内部零件分别工作22年和33年的Kh18N9辐照钢样品的透射电子显微镜研究结果，可以估算长期运行过程中孔隙整体的演变。绘制了长达50年的平均尺寸，浓度，孔的整体表面和膨胀的时间依赖性。