Projects / Programmes
Modelling of nonhomogeneous atmosphere in nuclear power plant containment
Code |
Science |
Field |
Subfield |
2.03.00 |
Engineering sciences and technologies |
Energy engineering |
|
Code |
Science |
Field |
T160 |
Technological sciences |
Nuclear engineering and technology |
nuclear power plant,severe accident,atmosphere,stratification,mixing,hydrogen
Researchers (9)
no. |
Code |
Name and surname |
Research area |
Role |
Period |
No. of publicationsNo. of publications |
1. |
24256 |
PhD Miroslav Babić |
Process engineering |
Junior researcher |
2004 - 2007 |
43 |
2. |
04143 |
MSc Ljubo Fabjan |
Energy engineering |
Technical associate |
2004 - 2007 |
177 |
3. |
05570 |
PhD Ivo Kljenak |
Energy engineering |
Head |
2004 - 2007 |
466 |
4. |
24075 |
Tanja Klopčič |
|
Technical associate |
2004 - 2007 |
6 |
5. |
02852 |
PhD Borut Mavko |
Energy engineering |
Researcher |
2004 - 2007 |
930 |
6. |
06631 |
PhD Iztok Parzer |
Energy engineering |
Researcher |
2004 - 2006 |
194 |
7. |
21181 |
Zoran Petrič |
Energy engineering |
Researcher |
2005 - 2007 |
15 |
8. |
19725 |
Andrej Sušnik |
|
Technical associate |
2004 - 2007 |
0 |
9. |
12057 |
PhD Iztok Tiselj |
Energy engineering |
Researcher |
2004 - 2007 |
469 |
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 understanding and prediction of hydrogen behaviour in the containment of a nuclear power plant at severe accident conditions is necessary for the planning of mitigation measures to prevent containment failure, which would lead to fission products release to the environment. The subject of the proposed research is modelling of non-homogeneous (in the sense of temperature and species concentration) multi-component atmosphere (air, steam and hydrogen) in nuclear power plant containment at severe accident conditions. The purpose of the research is the prediction of flow and thermal conditions in the containment.
Two complementary approaches will be used: a description on local length scale, and a description with lumped-parameter codes. In the description on local scale, the following basic phenomena, which strongly influence atmosphere mixing and stratification, will be particularly considered: gas turbulent flow, gas buoyant flow, and steam condensation on vessel walls and other structures. Transport equations of mass, momentum and energy will be solved using a Computational Fluid Dynamics code. A two-dimensional and a three-dimensional model will be developed. The models will be assessed by comparing calculated results with experimental data from the TOSQAN, MISTRA and THAI facilities.
The results of modelling on local scale will serve as a basis for modelling with lumped-parameter codes. An adequate subdivision of larger volumes into smaller cells will be determined and adequate values of flow resistance coefficients for gas flow between cells will be prescribed. In this way, guidelines will be proposed for simulating the non-homogeneous atmosphere in containments of real nuclear power plants using lumped-parameter codes.