应用CDAG方法进行EPR机组的严重事故堆芯损伤研究

辐射防护通讯 ›› 2019, Vol. 39 ›› Issue (3): 1-9.

应用CDAG方法进行EPR机组的严重事故堆芯损伤研究

李嘉明¹, 殷煜皓²

1.台山核电合营有限公司, 广东台山, 529228;
2.苏州热工研究院有限公司, 江苏苏州, 215004

收稿日期:2019-03-28 出版日期:2019-06-20 发布日期:2020-07-21
作者简介:李嘉明(1985— ),男, 2008年毕业于天津大学化学工程与工艺专业,学士; 2010年毕业于天津大学核燃料循环与材料专业,硕士; 工程师。

Study on Core Damage of Severe Accidents in EPR Units Using the CDAG Method

Li Jiaming¹, Yin Yuhao²

1. Taishan Nuclear Power Joint Venture Co., Ltd, Taishan, Guangdong, 529228;
2. Suzhou Nuclear Power Research Institute, Suzhou, Jiangsu, 215004

Received:2019-03-28 Online:2019-06-20 Published:2020-07-21

摘要/Abstract

摘要： 介绍了堆芯损伤评价的指导方法,并将西屋公司的CDAG方法论应用于EPR机组进行严重事故堆芯损伤研究。CDAG堆芯损伤程度的评价主要由2个参数判断:安全壳辐射监测值(CRM)和堆芯出口热电偶读数(CET)。本文讨论了CRM与CET的堆芯损伤估算结果存在差异的原因,分析结果表明:①CDAG是一种适用于EPR机组严重事故下堆芯损伤评价的方法;②CDAG方法能反映实时的堆内裂变产物释放的份额,能够快速地为应急组织决策提供支持;③基于EPR设计的CRM和CET整定值的保守计算结果显示出一个较为合理的趋势和范围;④释放方式、燃耗、RCS裂变产物滞留等因素对堆芯损伤估算结果有较大的影响。

关键词: 堆芯损伤评价, CDAG, 安全壳辐射监测值, 堆芯出口热电偶读数

Abstract: We introduce core damage evaluation guidelines, and apply Westinghouse's CDAG method to EPR units to study the core damage in severe accidents. CDAG evaluates the core damage degree mainly by judging of two parameters, namely, the containment radiation monitoring value (CRM) and the core outlet thermocouple reading (CET). We discusse the reasons for the differences between CRM and CET in the core damage estimation. The analysis results show that: 1) CDAG is suitable for the core damage evaluation in severe accidents for EPR units; 2) CDAG can reflect the real-time release fraction of fission products in reactors, so as to quickly support the emergency organizations' decision-making; 3) The conservative calculation results of CRM and CET settings based on the EPR design show a reasonable trend and range; 4) Factors such as the releasing way, fuel burn-up, and RCS fission product retention have a great impact on the core damage estimation results.

Key words: Core damage assessment, CDAG, CRM, CET

中图分类号:

TL364⁺.4

李嘉明, 殷煜皓. 应用CDAG方法进行EPR机组的严重事故堆芯损伤研究[J]. 辐射防护通讯, 2019, 39(3): 1-9.

Li Jiaming, Yin Yuhao. Study on Core Damage of Severe Accidents in EPR Units Using the CDAG Method[J]. RADIATION PROTECTION BULLETIN, 2019, 39(3): 1-9.