| 常元智,屈国普,汪伦,张文利.核电站安全壳内18F输运模拟研究[J].南华大学学报(自然科学版),2019,33(4):6~11.[CHANG Yuanzhi,QU Guopu,WANG Lun,ZHANG Wenli.Simulation of18F Transport in Nuclear Power Plant Containment[J].Journal of University of South China(Science and Technology),2019,33(4):6~11.] |
| 核电站安全壳内18F输运模拟研究 |
| Simulation of18F Transport in Nuclear Power Plant Containment |
| 投稿时间：2019-03-19 |
| DOI： |
| 中文关键词: 安全壳 18F浓度 数值模拟 辐射监测 |
| 英文关键词:containment the concentration of 18F numerical simulation radiation monitoring |
| 基金项目:国家自然科学基金资助项目(11175083);湖南省自然科学基金资助项目(2018JJ2314);南省研究生科研创新资助项目(CX2018B611);南华大学研究生科研创新资助项目(2018KYZ007) |
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| 中文摘要: |
| 为提高核电站安全壳内一回路管道破损泄漏出的中子活化产物18F浓度的测量精度,利用数值模拟方法,初步研究了一回路中子活化产物18F泄漏后在安全壳内的传输机理,获得了18F随时间变化在安全壳内浓度分布云图、速度云图,在取样点体积浓度随时间变化情况。数值模拟结果表明:在反应堆本体发生泄漏900 s后,安全壳内18F扩散趋于稳定,达到动态平衡状态;18F在安全壳内浓度分布呈现分层特点,上层空间浓度高于下部空间;不同监测区域18F体积浓度存在差别,据此有助于18F辐射监测仪器获取准确度更高的一回路泄漏率。 |
| 英文摘要: |
| To improve measurement precision of the primary circuit in nuclear power plant containment pipe leak out of the broken of neutron activation product 18F concentration,using numerical simulation method, it preliminarily studied the primary circuit after 18F leakage neutron activation products in the containment vessel transport process,and obtained 18F cloud changes over time within the containment concentration distribution and velocity contours,the sampling point volume concentration change over time.Numerical simulation results show that after the reactor body leaks 900 s,the 18F diffusion in the containment tends to be stable and reaches the state of dynamic equilibrium.The concentration distribution of 18F in the containment vessel is stratified,and the concentration in the upper space is higher than that in the lower space.There are differences in the 18F volume concentration in different monitoring areas,which is helpful for the 18F radiation monitoring instrument to obtain the primary leakage rate with higher accuracy. |
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