Abstract

A model of the final stage of nonstationary swelling has been developed to predict the residual life of fast neutron fuel elements by the criterion of achieving a swelling of 15%. A criterion for achieving this stage is formulated, using the shape of the histogram of the void size distribution. A set of characteristics of radiation porosity, sufficient for a quantitative description of the swelling of reactor structures, is determined. The possibilities of using the model to predict the residual life of the fuel-element claddings made of EK164 steel after a service in the BN-600 reactor until achieving a maximum damaging dose of 99 dpa are illustrated.

中文翻译：

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金属非稳态辐射膨胀最终阶段的模型

摘要

已经开发了非平稳膨胀最终阶段的模型，以达到15％膨胀的标准来预测快速中子燃料元件的剩余寿命。使用空隙尺寸分布的直方图的形状来制定实现此阶段的标准。确定足以足以描述反应堆结构膨胀的一组辐射孔隙率特征。说明了使用该模型预测由EK164钢制成的燃料元件包壳在BN-600反应堆中使用后直至达到最大破坏剂量99 dpa的剩余寿命的可能性。