Projects / Programmes
Limit states of npp components affected by aging
| Code |
Science |
Field |
Subfield |
| 2.13.00 |
Engineering sciences and technologies |
Process engineering |
|
| Code |
Science |
Field |
| T160 |
Technological sciences |
Nuclear engineering and technology |
| T500 |
Technological sciences |
Safety technology |
Integrity of pressurized systems, intergranular stress corrosion cracking, numerical simulations, probability of failure
Researchers (3)
| no. |
Code |
Name and surname |
Research area |
Role |
Period |
No. of publicationsNo. of publications |
| 1. |
07025 |
PhD Leon Cizelj |
Energy engineering |
Head |
1998 - 2001 |
963 |
| 2. |
13372 |
MSc Tomaž Dvoršek |
Process engineering |
Researcher |
1998 - 2001 |
51 |
| 3. |
04143 |
MSc Ljubo Fabjan |
Energy engineering |
Researcher |
1998 - 2001 |
177 |
Organisations (1)
| no. |
Code |
Research organisation |
City |
Registration number |
No. of publicationsNo. of publications |
| 1. |
0106 |
Jožef Stefan Institute |
Ljubljana |
5051606000 |
90,753 |
Abstract
The research is focussed on the limit states, which are important for the safety of degraded pressurized vessels and pipes:
? Excessive leakage through the defects (without complete failure of the component) and
? Failure of the component.
The tubes of steam generators of nuclear power plants, affected by stress corrosion cracking, are taken as an example. An algorithm was developed to estimate the failure probability, which accounts for the most important influencing parameters:
? Mathematical model of the limit state function, which delineates between safe and failed states of the component;
? Defect growth model and
? Model of the non-destructive examination method.
The results of sensitivity analyses directed the future research into improvements of the models describing the limit state function. The main part of the efforts is the simulation of the random microstructure of the material using the Incomplete random tessellation. The main goal is the modelling of initiation and growth of intergranular cracks together with appreciation of the random microstructure.
