理化检验-物理分册2026，Vol.62Issue(8)：54-59,6.DOI:10.11973/lhjy-wl260186
核电厂安全壳喷淋应急注水引出管线螺杆开裂原因
Reasons for the cracking of the screw in the emergency water injection pipeline of the nuclear power plant containment spray
李汭 1廖雪波 1薛运强1
作者信息
- 1. 福建宁德核电有限公司,宁德 352000
- 折叠
摘要
Abstract
A cracking accident occurred during the service of the emergency water injection pipeline screw for the containment spray of a nuclear power plant.The causes of screw cracking were analyzed using macroscopic observation,chemical composition analysis,mechanical property testing,metallographic examination,scanning electron microscopy and energy spectrum analysis.The results show that the carbon element content of the screw material was relatively high,and there were a large number of precipitates distributed at the grain boundaries,which reduced the intergranular stress corrosion resistance of the material and led to intergranular stress corrosion cracking of the screw.There were many non-metallic inclusions distributed in the matrix structure,which caused stress concentration in the material and further promoted crack propagation.关键词
螺杆/应力腐蚀开裂/晶间析出物/非金属夹杂物/显微组织Key words
screw/stress corrosion cracking/intergranular precipitate/non-metallic inclusion/microstructure分类
通用工业技术引用本文复制引用
李汭,廖雪波,薛运强..核电厂安全壳喷淋应急注水引出管线螺杆开裂原因[J].理化检验-物理分册,2026,62(8):54-59,6.
