Projects / Programmes
Safety margins, thermalhydraulic, peak cladding temperature, two-phase flow, accuracy quantification
Code |
Science |
Field |
Subfield |
2.03.00 |
Engineering sciences and technologies |
Energy engineering |
|
Code |
Science |
Field |
T160 |
Technological sciences |
Nuclear engineering and technology |
safety margins, thermalhydraulic, peak cladding temperature, two-phase flow, accuracy quantification
Researchers (7)
no. |
Code |
Name and surname |
Research area |
Role |
Period |
No. of publicationsNo. of publications |
1. |
04143 |
MSc Ljubo Fabjan |
Energy engineering |
Technical associate |
2004 - 2007 |
177 |
2. |
24075 |
Tanja Klopčič |
|
Technical associate |
2004 - 2007 |
6 |
3. |
02852 |
PhD Borut Mavko |
Energy engineering |
Researcher |
2004 - 2007 |
930 |
4. |
06631 |
PhD Iztok Parzer |
Energy engineering |
Researcher |
2004 - 2006 |
194 |
5. |
21181 |
Zoran Petrič |
Energy engineering |
Researcher |
2005 - 2007 |
15 |
6. |
08661 |
PhD Andrej Prošek |
Energy engineering |
Head |
2004 - 2007 |
600 |
7. |
19725 |
Andrej Sušnik |
|
Technical associate |
2004 - 2007 |
0 |
Organisations (1)
no. |
Code |
Research organisation |
City |
Registration number |
No. of publicationsNo. of publications |
1. |
0106 |
Jožef Stefan Institute |
Ljubljana |
5051606000 |
90,753 |
Abstract
A sufficient safety margin is a key issue for the economical operation of reactors using new fuel designs, high burn-up or new fuel management schemes. Especially important is the evaluation of the safety margin in relation to the Peak Cladding Temperature (PCT) during a hypothetical loss-of-coolant accident. Its accurate prediction is mostly connected to the cooling of the cladding.
With the existing thermalhydraulic conservative codes it is not possible to assess the real safety margins for peak cladding temperature. The safety margins assessment with best estimate codes is influenced by uncertainties. The solution of this problem is development of thermalhydraulic codes based on physical models.
The aims of the research are identification and development of methods for safety margin assessment, evaluation of system code results and of models controlling prediction of peak cladding temperatures, quantification of accuracy in the prediction and validation of newly proposed European NURESIM system code. The accuracy of models will be quantified using Fast Fourier Transform Based Method (FFTBM), which will be further improved in order to assess accuracy as a function of time. The models of existing RELAP5 and TRACE code will be evaluated on the base of experimental data. We will contribute to the development and validation of European NURESIM thermalhydraulic code. For validation the experiments dealing with core uncovery will be used (e.g. BETHSY data).
The proposed aims are very challenging and are integrated in the EU 6 framework programme research. The proposed research contributes to assessment of safety margins, accuracy quantification of predictions, new simulation tools for thermal-hydraulics etc. The results of the proposed research are theoretical basis for safety analyses, related to safe operation of Krško nuclear power plant (NPP) and technical projects for Krško NPP and Slovenian Nuclear Safety Administration (SNSA). The research directly contributes to more flexible supply of electricity, environment protection and public health.