高温气冷堆中多层微细石墨颗粒重悬浮模型研究

来源 :第九届海峡两岸超微颗粒学术研讨会暨中国颗粒学会超微颗粒专委会2015年会 | 被引量 : 0次 | 上传用户:hnfengzhong
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  高温气冷堆内石墨粉尘的重悬浮特性,是推断正常运行状态下反应堆内石墨粉尘浓度的基本途径,也是关乎失压失冷事故中放射性释放量和反应堆环境安全的关键问题。准确的重悬浮模型是高温堆安全分析的重要组成部分。现有模型对象均是壁面上的单颗粒,而在数十年的运行期间,反应堆堆芯表面堆积着多层颗粒。因此需要建立多层颗粒的重悬浮模型。本文在RocknRoll 模型的基础上,通过递推关系,得到某一层颗粒的重悬浮份额和总的重悬浮份额随着时间和流速的变化规律。结果表明,多层颗粒的重悬浮具有“滞后”效应,且在相同的流场条件下,多层颗粒的重悬浮份额小于单层颗粒。
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