摘要
“华龙一号”地坑设置非能动pH值调节篮,加入碱性添加剂控制大破口失水事故(LOCA)后安全壳内置换料水箱(IRWST)pH,从而降低壳内气相碘浓度,预测事故后pH和碘浓度对事故源项和放射性分析至关重要。本文针对LOCA后再循环水流程,结合碘的气液分配、双膜理论以及碘形态与pH关系,建立宏观瞬态模型,实现事故后IRWST瞬态pH、物质浓度以及安全壳内气液两相碘浓度计算。对比Visual MINTEQ软件结果验证了模型pH计算,选取工况参数代入模型分析影响因素,结果正确反映pH与碘浓度的关系,证明该模型具备预测事故后pH和碘浓度的能力。
A passive pH adjustment basket is set in the HPR1000 pit to control the pH of the incontainment refueling water storage tank(IRWST)after the loss of coolant accident(LOCA)by adding alkaline additives,so as to reduce the concentration of gaseous iodine in the containment.Predicting the pH and iodine concentration after an accident is critical for accident source term and radioactive analysis.In this paper,aiming at the recirculation water flow after LOCA,combined with the gas-liquid distribution of iodine and the two-film theory and the relationship between iodine form and pH,a macro transient model is established to realize the calculation of IRWST transient pH,substance concentration and gas-liquid two-phase iodine concentration in containment after the accident.By comparing with the results of Visual MINTEQ software,the pH calculation part of the model is verified.The condition parameters are substituted into the model to analyze the influencing factors.The results can correctly show the relationship between pH and iodine concentration,which proves that the model has the ability to predict pH and iodine concentration after accident.
作者
王城喻
路长冬
郭少强
陈忆晨
周文涛
江娉婷
Wang Chengyu;Lu Changdong;Guo Shaoqiang;Chen Yichen;Zhou Wentao;Jiang Pingting(School of Nuclear Science and Technology,Xi’an Jiaotong University,Xi’an,710049,China;China Nuclear Power Technology Research Institute Co.,Ltd.,Shenzhen,Guangdong,518031,China;Shanghai Jiao Tong University,Shanghai,200240,China)
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2024年第1期186-193,共8页
Nuclear Power Engineering
基金
陕西省自然科学基础研究计划(2022JQ-372)。
