CNP600冷管段不同破口面积对一回路安全影响的仿真分析.pdfVIP

Nuclear Science and Technology 核科学与技术, 2014, 2, 67-77 Published Online October 2014 in Hans. /journal/nst /10.12677/nst.2014.24011 The Simulation and Safety Analysis of CNP 600 Primary Loop under Different Broken Areas of Cold Leg Xiuqun Hou, Danmei Xie, Peng Zhang, Cong Wang School of Power and Mehanic, Wuhan University, Wuhan, China Email: houxiuqun@ nd st th Received: Sep. 2 , 2014; revised: Oct. 1 , 2014; accepted: Oct. 9 , 2014 Copyright © 2014 by authors and Hans Publishers Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). /licenses/by/4.0/ Abstract LOCAs are severe accidents of primary loop. In order to analyse the variation of system’s main pa- rameters between several different broken areas when there is LOCA, this paper established the model of CNP600 in RELAP5 according to Qin Shan II NPP, and set up seven broken areas from small LOCA to large LOCA to calculate. The results show that under the action of safety injection system, the impact of the accident has weakened. However, the results also indicate that some of the large broken areas are of great harm to the system. Keywords CNP600, RELAP5, Broken Area Size, System Safety CNP600冷管段不同破口面积对一回路安全影 响的仿真分析 侯修群，谢诞梅，张 鹏，王 聪 武汉大学动力与机械学院，武汉，中国 Email: houxiuqun@ 收稿日期：2014年9月2 日；修回日期：2014年10月1 日；录用日期：2014年10月9 日 67 CNP600 冷管段不同破口面积对一回路安全影响的仿真分析 摘 要 破口事故是一回路严重事故，为了分析不同破口面积下一回路系统主要参数变化，本文用RELAP5建立 了以秦山二期为对象的CNP600的一回路模型，设置了从小破口到大破口的七种不同面积的破口事故， 并逐一进行仿真分析。仿真结果表明，在安注系统的作用下，事故对一回路安全的影响有所缓解，而某 些大破口的面积对系统安全危害较大。 关键词 CNP600，RELAP5，破口大小，系统安全 1. 引言 破口事故是一回路严重事故，长期以来一直是研究者和设计人