Abstracts and Available Papers Presented at the Meeting
Neutronic Calculations for the Conversion to LEU of a Research Reactor Core
D. Grigoriadis1,2, N. Catsaros1,
1 National Center for Scientific Research "DEMOKRITOS" 153 10, Aghia Paraskevi, Greece
2 Department of Mechanical and Manufacturing Engineering, University of Cyprus, P.O. Box 20537, Nicosia, 1678, Cyprus
The thermal-hydraulic analysis performed for the needs of the conversion of the open pool 5MW Greek Research Reactor (GRR-1) to a pure Low Enrichment (LEU) configuration is presented. The methodology was based on a complete set of neutronic calculations performed for the new core configuration, in compliance with pre-defined Operation Limiting Conditions. The hottest channel analysis approach was adopted, and peaking factors were used to account for fabrication or measuring uncertainties. Calculations were carried out using the numerical codes NATCON, PLTEMP and PARET provided by Argonne National Laboratory (Argonne). Two main different classes of conditions were considered, namely i) steady state normal operating conditions and ii) transient cases related to accidental events including reactivity feedback effects. For steady state operating conditions the behaviour of the new configuration was examined both for forced and natural convection cooling modes. Transient calculations considered several initiating events including reactivity insertion accidents (slow or fast reactivity insertion) and total or partial loss-of-flow accidents, i.e. in accordance to guidelines provided by the IAEA for research Reactors.
Full paper in PDF format
Calculations for the Conversion to LEU of a Research
Reactor Core, M. Varvayanni et al.
[PDF, 290KB, 10 pages]
Download the latest and free version of Adobe's Reader to view documents in PDF format. If you have questions about or problems with downloading, installing or using Adobe's Reader, please visit the Adobe website.
Problems viewing/ printing PDF files
Should you experience problems with viewing/printing the PDF files:
PDF Help Notes (link opens in new browser window)
Dr. Jordi Roglans-Ribas
Technical Director, RERTR Department
Nuclear Engineering Division – 362
Argonne National Laboratory
9700 South Cass Avenue
Argonne, IL 60439
Fax: +1 630-252-5161