Abstract
At the german HDR-test-facility a pipe failure experiment was performed at a fullsize feedwater piping system under operating conditions of and with an elevated oxygen content in the pressure medium. The loading was internal pressure and a cyclic varying bending moment with an of 0.5. The in form of a circumferentially orientated notch initially weakened piping system failed after a total number of 4773 loaded cycles with different frequencies in form of a small leak.
The analyses of the fracture surface indicated the strongly growing influence of corrosion effects on the crack propagation rate with decreasing loading frequency.
The cyclic crack growth and the leak-before-break behavior of the piping system could be explained on the basis of results of finite element calculations using ADINA-code.
The analyses of the fracture surface indicated the strongly growing influence of corrosion effects on the crack propagation rate with decreasing loading frequency.
The cyclic crack growth and the leak-before-break behavior of the piping system could be explained on the basis of results of finite element calculations using ADINA-code.
| Original language | English |
|---|---|
| Pages (from-to) | 197-210 |
| Journal | Nuclear Engineering and Design |
| Volume | 112 |
| DOIs | |
| Publication status | Published - 1989 |
| MoE publication type | B1 Article in a scientific magazine |