钠水反应试验系统中小泄漏钠水反应氢气分布特性

蒸汽发生器是钠冷快堆的关键设备之一，其传热管破裂引发的钠水反应会产生大量氢气及热量，危害钠冷快堆的安全运行。本文基于VOF多相流模型，在钠水反应试验系统内开展中小泄漏钠水反应工况的数值分析，获得了高压反应釜内氢气在钠水反应下的三维空间分布特性和迁移特性。结果表明：高压反应釜内氢气的迁移特性受钠液流速影响，氢气在整个循环环路的迁移特性主要受水泄漏量控制。通过设置灵敏度为0.005 ppm的氢计，获得了环路不同区域检测到氢气的最快特征时间。

Hydrogenin Distribution Characteristics of Sodium-water Reaction under Small and Medium Leakage Test System for Sodium-water Reaction

The steam generator is one of the crucial equipments of the sodium-cooled fast reactor. The sodium water reaction caused by the heat transfer pipe rupture generates a large amount of hydrogen and heat, which will endanger the safety of the sodium-cooled fast reactor. In this study, a numerical investigation in the sodium-water reactor test system under sodium-water reaction case of small and medium leakage was simulated based on VOF (volume of fluid) multiphase flow model. Both the three-dimensional spatial distribution and migration characteristics of hydrogen in the autoclave were obtained. The analytical results show that the migration characteristics of hydrogen in the autoclave are affected by the sodium flow rate, and the migration characteristics of hydrogen in the entire circulation loop are mainly controlled by the water leakage rate. By setting hydrogen meter with a sensitivity of 0.005 ppm, the fastest characteristic time for detecting hydrogen in different regions of the circulation loop is obtained.