钠冷快堆燃料破损及其探测方法

Journal of Shenzhen University Science and Engineering(2016)

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Abstract
结合钠冷快堆一回路冷却剂系统特点,系统阐述了燃料包壳在不同尺寸破口下的裂变产物释放机理.燃料包壳在小气密性破损阶段会有气态裂变核素Kr和Xe释放到一回路覆盖气体中,当发展到燃料与冷却剂接触性破损阶段,短寿命的缓发中子先驱核会释放到钠冷却剂中.钠冷快堆燃料破损在线监测系统由燃料破损覆盖气体监测系统和燃料破损缓发中子监测系统组成,分别监测不同性质的燃料破损.基于国际快堆燃料破损在线监测系统设计方案对比分析,评述了不同的燃料破损探测方法和影响燃料破损探测灵敏度的相关因素.
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Key words
atomic energy technology,sodium cooled fast reactor,metallic material,fuel cladding,failed fuel detection,fission product release,delayed neutron precursor,delayed neutron detection
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