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Thermal-hydraulic modeling of reactivity accidents in MTR reactors

  • H. Khater , T. Abu-El-Maty and S. El-Din El-Morshdy
Published/Copyright: April 6, 2013
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Abstract

This paper describes the development of a dynamic model for the thermal-hydraulic analysis of MTR research reactor during a reactivity insertion accident (RIA). The model is formulated for coupling reactor kinetics with feedback reactivity and the reactor core thermal-hydraulics. Two channels are considered; the average and the hot channels to represent the reactor core. 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. The model is used for simulating uncontrolled withdrawal of a control rod for the ETRR-2 reactor in transient with over power scram trip. The simulation results for the ETRR-2 are analyzed and discussed.

Kurzfassung

In der vorliegenden Arbeit wird die Entwicklung eines dynamischen Modells für die thermohydraulische Analyse von MTR Forschungsreaktoren während eines Reaktivitätsunfalls (RIA) beschrieben. Das Modell wird für eine gekoppelte Reaktorkinetik mit Reaktivitätsfeedback und Reaktorkern Thermohydraulik formuliert. Das Computerprogramm wurde in FORTRAN für PC Anwendungen entwickelt. Das Modell wird validiert mit Hilfe von Sicherheits-bezogenen Benchmarkberechnungen für MTR Reaktoren des IAEA10 MW generischen Reaktors für langsame und schnelle Reactivity Insertion Transients. Zwischen dem entwickelten Modell und den Benchmarkberechnungen zeigt sich eine gute Übereinstimmung. Das Modell wird verwendet zur Simulation der unkontrollierten Entfernung eines Steuerungsstabes für den ETRR-2 Reaktor im Transientenmodus mit Over Power Scram Trip. Die Simulationsergebnisse für den ETRR-2 Reaktor werden analysiert und diskutiert.

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Received: 2006-8-31
Published Online: 2013-04-06
Published in Print: 2007-03-01

© 2007, Carl Hanser Verlag, München

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