Open AccessFailure analysis of the rubber expansion joint of fire water system in a nuclear power plant
Author(s) -
XieZhe,
XuKe,
ZhangWei,
XuZhu,
ChenXueyao,
TangYi,
GuiChun
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/639/1/012041
Subject(s) - expansion joint , flange , joint (building) , nuclear power plant , natural rubber , structural engineering , materials science , nuclear power , composite material , forensic engineering , engineering , physics , nuclear physics
The rubber expansion joint of fire water system in one nuclear power plant was cracked during service. By means of macroscopic and microscopic analysis, combined with mechanical calculation, the reasons of cracks in this expansion joint were analyzed. And the results showed that: the joint action of concentrated stress caused by improper installation and unqualified rubber material led to the crack source. With the crack propagation, part of the flange was separated from the main body of the expansion joint. Recommendations were then proposed to avoid the recurrence of similar events.