Power up-grading study for the first Egyptian research reactor
| Autor: | N. Ashoub, A. Fathallah, H. El-Sawy Temraz |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Nuclear and High Energy Physics
Engineering Waste management business.industry Critical heat flux Mechanical Engineering Nuclear engineering Nuclear reactor Coolant law.invention Thermal hydraulics Nuclear Energy and Engineering Nuclear reactor core Heat flux law Pressurizer General Materials Science Light-water reactor Safety Risk Reliability and Quality business Waste Management and Disposal |
| Zdroj: | Nuclear Engineering and Design. 208:245-254 |
| ISSN: | 0029-5493 |
| DOI: | 10.1016/s0029-5493(01)00359-4 |
| Popis: | In the present work, power up-grading study is performed, for the first Egyptian Research Reactor (ET-RR-1), using the present fuel basket with 4×4 fuel rods, (17.5 mm pitch), and a proposed fuel basket with 5×5 fuel rods, (14.0 mm pitch), without violating the thermal hydraulic safety criteria. These safety criteria are; fuel centerline temperature (fuel melting), clad surface temperature (surface boiling), outlet coolant temperature, and maximum heat flux (critical heat flux ratio). Different thermal reactor powers (2–10 MW) and different core coolant flow rates (450, 900, 1350 m3 h−1) are considered. The thermal hydraulic analysis was performed using the subchannel code COBRA-IIIC for the estimation of temperatures, coolant velocities and critical heat flux. The neutronic calculations were performed using WIMS-D4 code with 5 — group neutron cross section library. These cross sections were adapted to use in the two-dimensional (2-D) diffusion code DIXY for core calculations. The study concluded that ET-RR-1 power can be upgraded safely up to 4 MW with the present 4×4-fuel basket and with the proposed 5×5-fuel basket up to 5 MW with the present coolant flow rate (900 m3 h−1). With the two fuel arrays, the reactor power can be upgraded to 6 MW with coolant flow rate of 1350 m3 h−1 without violating the safety criterion. It is also concluded that, loading the ET-RR-1 core with the proposed fuel basket (5×5) increases the excess reactivity of the reactor core than the present 4×4 fuel matrix with equal U-235 mass load and gave better fuel economy of fuel utilization. |
| Databáze: | OpenAIRE |
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