百万千瓦级核电站全厂断电叠加破口事故分析  

Analysis of accident by SBO With Stack Breakage for 1000 MWe NPP

作　　者：袁显宝 夏寅泳[1,2] 张彬航 张永红 刘芙蓉 俞玲[3] 黄家胜 林钦[1,2] YUAN Xianbao;XIA Yinyong;ZHANG Binhang;ZHANG Yonghong;LIU Furong;YU Ling;HUANG Jiasheng;LIN Qin(College of Mechanical and Power Engineering,China Three Gorges University,Yichang of Hubei Prov. 443002,China;China Three Gorges University,Hubei Key Laboratory of Hydroelectric Machinery Design & Maintenance,YiChang of Hubei Prov.443002,China;Wuhan Electric Technical Power College,Wuhan of Hubei Prov. 430079,China)

机构地区：[1]三峡大学机械与动力学院,湖北宜昌443002 [2]三峡大学湖北省水电机械设备设计与维护重点实验室,湖北宜昌443002 [3]武汉电力职业技术学院,湖北武汉430079

出　　处：《核科学与工程》2019年第3期440-446,共7页Nuclear Science and Engineering

基　　金：RHIC和LHC能区核核碰撞中奇异粒子产生特性的研究,11247021;湖北省水电机械设备设计与维护重点实验室开放基金(2016KJX15)

摘　　要：在发生全厂断电的情况下,冷管段出现破口将会进一步加快事故进程。利用一体化严重事故分析程序 MAAP4 对百万千瓦级核电站全厂断电叠加冷管段破口进行计算分析,得到该事故时间序列和关键热工水力参数随时间的变化趋势。对于重要参数(一回路压力,堆芯液位,时间序列等)的分析:随着中小破口当量直径由 4 cm 增至 5 cm,堆芯裸露时间分和失效时间提前分别约 1 000 s和 3000 s;中破口当量直径由 5 cm 增至 7 cm,堆芯裸露时间和失效时间提前分别约 1 400 s 和6 457 s;而大破口事故当量直径由 20 cm 增至 21 cm,堆芯裸露时间和失效时间分别仅提前约 20 s和 230 s。相关数据及其分析可为严重事故的缓解措施提供相关理论依据。In the event of Station blackout,a break in the cold pipe section will further accelerate the accident process.Using MAAP4 code to simulate the failure of the superposition of the superposition cold pipe section in the whole plant of the 1 000 MWe NPP,and the change trend with time of the time node and the thermal hydraulic parameters was obtained.Analysis of important parameters(primary circuit pressure,core level,time series, etc):As the equivalent diameter of the small and medium breaks increases from 4 cm to 5 cm, and the core uncovered and vessel failure of time are approximately 1 000 s and 3 000 s in advance;The equivalent diameter increased from 5 cm to 7 cm,the core exposure time and failure time were 1 400 s and 6 457 s earlier;while the large break accident equivalent diameter increased from 20 cm to 21 cm,the core exposure time and failure time were only about 20 s and 230 s ahead of time.The relevant data and its analysis can be provided as relevant theoretical basis in formulating of the severe accident mitigation measures.

关 键 词：MAAP 程序 全厂断电 严重事故 时间序列 

分 类 号：TL364[核科学技术—核技术及应用]