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| 1 | 压水堆核电厂蒸汽发生器传热管道破裂事故源项的计算分析显示文摘当压水堆核电厂发生事故后,带有放射性的核素会通过破损处释放到环境中,从而危害核电厂周边环境及相关人员的安全,因此对事故后释放到环境中的放射性源项分析,对于核电厂的辐射防护具有重要意义。本文根据事故发生的频率以及后果严重程度,选取蒸汽发生器传热管破裂事故(Steam Generator Tube Rupture,SGTR)进行分析。事故分为事故前碘尖峰释放和事故并发碘尖峰释放两种事故工况,建立事故后放射性核素迁移和扩散计算模型,同时使用先进压水堆AP1000参数进行计算验证,并重点关注惰性气体和挥发性核素碘在环境中的放射性活度。计算结果显示:使用文中计算模型计算的放射性源项与设计源项比较一致,在两种工况下,惰性气体的释放活度与设计源项吻合较好,但碘的释放活度有明显差别。 | 樊雨轩 张竞宇 王晓东 陈义学 郭庆洋 梁秋莹 熊雯雯 | 2020 | 核技术2020，43，6： | 4 |
| 2 | 基于相敏瞬态热测量的双壁换热管层间接触热阻实验研究显示文摘双层316L不锈钢换热管道被广泛应用于反应堆蒸汽发生器中,其层间接触热阻(TCR)是换热管的重要性能指标。针对这种管状结构的传热测量,设计并搭建了基于相敏瞬态电学热测量方法的实验台,在室温环境下开展实验。通过对传热模型的理论分析排除了外部空气自然对流对相位测量的影响,并由单层316L不锈钢换热管的热导率测量验证了实验系统的可靠性,测量值与其他文献报道的数值误差在6%以内。对双层换热管道的层间接触热阻(TCR)进行测量,实验结果揭示了双层管层间配合应力与接触热阻之间的关联性,并由实验结果出发讨论了界面周向的不均匀应力分布对双层管传热的影响。 | 王亚飞 Babar Hayat 张若谷 辜萍 侯虎旺 张鹏 赵旸 | 2022 | 实验力学2022，37，6： | 0 |
| 3 | PSA study of the effect of extreme snowfall on a floating nuclear power plant:case study in the Bohai Sea显示文摘This study presents a probabilistic safety analysis(PSA)method for the external event of extreme snowfall on a floating nuclear power plant(FNPP)deployed in the Bohai Sea.We utilized the Weibull and Gumbel extreme value distributions to fit the collected meteorological data and obtained a hazard curve for the event of an extreme snowfall where the FNPP is located,providing a basis for the frequency of extreme snowfall-initiating events.Our analysis indicates that extreme snowfall primarily affects the ventilation openings of the equipment,leading to the failure of devices such as the diesel generators.Additionally,extreme snowfall can result in a loss of off-site power(LOOP).Therefore,the developed extreme snowfall PSA model is mainly based on the LOOP event tree,considering responses such as snowfall removal by personnel.Our calculations indicate a core damage frequency(CDF)of 1.13×10^(-10) owing to extreme snowfall,which is relatively low.The results of the cut-set analysis indicate that valve failures in the core makeup tank(CMT),passive residual heat removal system(PRS),and in-containment refueling water storage tank(IRWST)significantly contribute to the CDF. | Lan‑Xin Gong Qing‑Zhu Liang Chang‑Hong Peng | 2023 | Nuclear Science and Techniques2023，34，11： | 0 |
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