CPR1000主管道焊缝缺陷问题分析

张进; 吴伟帮; 董义令

doi:10.7512/j.issn.1001-2303.2020.11.17

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CPR1000主管道焊缝缺陷问题分析
Analysis on defect prob lem of weld of CPR1000 main coolant line
2020年50卷第11期页码：93-97
纸质出版：2020
DOI： 10.7512/j.issn.1001-2303.2020.11.17
稿件说明：

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张进, 吴伟帮, 董义令. CPR1000主管道焊缝缺陷问题分析[J]. 电焊机, 2020,50(11):93-97. DOI： 10.7512/j.issn.1001-2303.2020.11.17.

ZHANG Jin, WU Weibang, DONG Yiling. Analysis on defect prob lem of weld of CPR1000 main coolant line[J]. Eletric Welding Machine2020, 50(11): 93-97. DOI： 10.7512/j.issn.1001-2303.2020.11.17.

摘要

针对某改进型三环路压水堆(CPR1000)主管道与蒸汽发生器出口接管安全端焊缝安装阶段射线检验(RT)合格、而役前检查(PSI)阶段射线检验发现未熔合缺陷显示的问题

进行了分析处理。针对返修操作对已进行的一回路系统水压试验结果的有效性造成影响

在解读RCC-M、RSE-M、ASME规范第Ⅲ卷及第Ⅺ卷中水压试验相关条款的基础上

提出了"焊接返修后采用两种体积检验方法或一种经评定的体积检验方法"进行无损检验的解决方案

确保了一回路系统水压试验结果的有效性。

Abstract

During pre-service inspection（PSI） of a certain CPR1000 nuclear power plant

a lack of fusion is found in the weld between main coolant line（MCL） and outlet nozzle safe end of steam generator（SG） which complies with the requi-rements of radiographic testing（RT） during erecting

and the defect is repaired. For the problem about the validity of the main primary system hydraulic test with the effect of welding repair of MCL weld

based on comprehensive analysis of the relevant items about hydraulic testing in RCC-M code

RSE-M code

Section Ⅲ and Section Ⅺ of ASME code

a solution for nondestructive testing is proposed

which is an examination comprising two volumetric examinations or an examination comprising a single volumetric examination

that ensures the validity of hydraulic test of the main primary system.