核安全2026，Vol.25Issue(1)：36-41,6.
核级接线箱DBA试验后螺栓断裂原因分析及处理
Analysis and Treatment of Bolt Fracture in Nuclear-Grade Junction Box Following DBA Test
孙志明 1罗雪君1
作者信息
- 1. 苏州热工研究院有限公司,苏州 215004||国家核电厂安全及可靠性工程技术研究中心,苏州 215004
- 折叠
摘要
Abstract
Based on the analysis of fracture morphology and the detection of corrosion residue,the failure reason of the bolt in a junction box after Design Basis Accident(DBA)test was analyzed.It was determined that the fracture mode of the bolt was intergranular brittle fracture,and the main reason for the fracture was the intergranular corrosion caused by the spray liquid of DBA test under high temperature and high pressure environment.According to the root cause of the failure,the design improvement scheme of the junction box is formulated,and an economic and effective supplementary qualification method is put forward.The practice shows that the design improvement can effectively eliminate the performance defects of the junction box,while the supplementary qualification provides evidence for the applicability of the junction box in harsh en-vironment and facilitates reasonable control of qualification costs.关键词
严酷环境/接线箱/螺栓断裂/根本原因/补充鉴定Key words
harsh environment/junction box/bolt fracture/root cause/supplementary qualification分类
信息技术与安全科学引用本文复制引用
孙志明,罗雪君..核级接线箱DBA试验后螺栓断裂原因分析及处理[J].核安全,2026,25(1):36-41,6.
