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首页> 外文会议>Safety Related Issues of Spent Nuclear Fuel Storage; NATO Security Through Science Series C: Environmental Security >INFLUENCE OF NEUTRON IRRADIATION ON MECHANICAL AND DIMENSIONAL STABILITY OF IRRADIATED STAINLESS STEELS AND ITS POSSIBLE IMPACT ON SPENT FUEL STORAGE
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INFLUENCE OF NEUTRON IRRADIATION ON MECHANICAL AND DIMENSIONAL STABILITY OF IRRADIATED STAINLESS STEELS AND ITS POSSIBLE IMPACT ON SPENT FUEL STORAGE

机译：中子辐照对辐照不锈钢的力学和尺寸稳定性的影响及其对燃料储存的影响

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摘要

Stainless steels used as cladding and structural materials in nuclear reactors undergo very pronounced changes in physical and mechanical properties during irradiation at elevated temperatures, often quickly leading to an increased tendency toward embrittlement. On a somewhat longer time scale there arise very significant changes in component volume and relative dimensions due to void swelling and irradiation creep. Irradiation creep is an inherently undamaging process but once swelling exceeds the 5-10% range austenitic steels become exceptionally brittle. Other processes also contribute to embrittlement and thereby contribute to difficulty in storing and handling of spent fuel assemblies removed from decommissioned fast reactors. In light water reactors other forms of embrittlement develop prior to reaching significant levels of void swelling. A review is presented of our current understanding of the radiation-induced changes in physical and mechanical properties that contribute to embrittlement.
机译：核反应堆中用作包层和结构材料的不锈钢在高温辐照期间会发生非常明显的物理和机械性能变化，通常会迅速导致脆化趋势增加。在更长的时间内，由于空隙膨胀和辐照蠕变，组件体积和相对尺寸会发生非常显着的变化。辐照蠕变是固有的无损过程，但一旦溶胀超过5-10％的范围，奥氏体钢就会变得异常脆。其他过程也导致脆化，从而导致难以存储和处置从退役快堆中取出的乏燃料组件。在轻水反应堆中，其他形式的脆化在达到明显的空隙膨胀水平之前就已经发展了。本文对目前我们对辐射引起的导致脆性的物理和机械性能变化的理解进行了回顾。

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