Nuclear Technology and Radiation Protection 2006 Volume 21, Issue 2, Pages: 21-32
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Thermal-hydraulic modeling of reactivity accidents in MTR reactors
Khater Hany, Abu-El-Maty Talal, El-Morshdy El-Din Salah
This paper describes the development of a dynamic model for the thermal-hydraulic analysis of MTR research reactors during a reactivity insertion accident. The model is formulated for coupling reactor kinetics with feedback reactivity and reactor core thermal-hydraulics. To represent the reactor core, two types of channels are considered, average and hot channels. The developed computer program is compiled and executed on a personal computer, using the FORTRAN language. The model is validated by safety-related benchmark calculations for MTR-TYPE reactors of IAEA 10 MW generic reactor for both slow and fast reactivity insertion transients. A good agreement is shown between the present model and the benchmark calculations. Then, the model is used for simulating the uncontrolled withdrawal of a control rod of an ETRR-2 reactor in transient with over power scram trip. The model results for ETRR-2 are analyzed and discussed.
Keywords: reactivity insertion accident, research reactor, thermal-hydraulic, safety analysis
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