中国核电
中國覈電
중국핵전
China Nuclear Power
2015年
3期
231-238
,共8页
控制棒驱动机构%Ω密封焊缝%泄漏%原因分析%修复方案
控製棒驅動機構%Ω密封銲縫%洩漏%原因分析%脩複方案
공제봉구동궤구%Ω밀봉한봉%설루%원인분석%수복방안
CRDM%omega seal weld%eakage%cause analysis%repair method
秦山核电有限公司30万千瓦机组CRDM下部Ω密封焊缝在运行5年后发生泄漏问题.通过对比现在CRDM下部Ω密封焊缝的无损检测结果与5年前的检测结果,结合下部Ω密封区域特殊环境条件下材料化学成分对腐蚀开裂的影响分析,初步确定了泄漏产生的根本原因.通过对比修复材料的耐腐蚀性能分析和修复方案,明确了预防CRDM下部Ω密封焊缝泄漏的修复材料和方案,同时指出了在修复实施过程中需要关注的问题,以供核电同行参考.
秦山覈電有限公司30萬韆瓦機組CRDM下部Ω密封銲縫在運行5年後髮生洩漏問題.通過對比現在CRDM下部Ω密封銲縫的無損檢測結果與5年前的檢測結果,結閤下部Ω密封區域特殊環境條件下材料化學成分對腐蝕開裂的影響分析,初步確定瞭洩漏產生的根本原因.通過對比脩複材料的耐腐蝕性能分析和脩複方案,明確瞭預防CRDM下部Ω密封銲縫洩漏的脩複材料和方案,同時指齣瞭在脩複實施過程中需要關註的問題,以供覈電同行參攷.
진산핵전유한공사30만천와궤조CRDM하부Ω밀봉한봉재운행5년후발생설루문제.통과대비현재CRDM하부Ω밀봉한봉적무손검측결과여5년전적검측결과,결합하부Ω밀봉구역특수배경조건하재료화학성분대부식개렬적영향분석,초보학정료설루산생적근본원인.통과대비수복재료적내부식성능분석화수복방안,명학료예방CRDM하부Ω밀봉한봉설루적수복재료화방안,동시지출료재수복실시과정중수요관주적문제,이공핵전동행삼고.
The leakage was discovered on the CRDM lower omega seal weld which had operated five years in Qinshan NPP. Based on the inspection of NDE for the CRDM lower omega seal weld in comparison with the inspecting result which had carried out five years ago, and the analysis according to the effect of corrosion cracking because of the chemical composition of materials in special condition, the root cause of the leakage is preliminarily identified. The repair method for the CRDM lower omega seal weld to prevent leakage is provided by analysis of corrosion resistance of the material which will used for comparison of repair method, which also provides a proposal needed to pay attention during repair, in order to give some helpful reference to nuclear peers.
