Modeling of KERENA emergency condenser

• Autorzy: Bryk R. , Schmidt H. , Mull T. , Wagner T. , Ganzmann I. , Herbst O.

Identyfikatory

DOI

10.1515/aoter-2017-0023

• Języki publikacji: EN

Abstrakty

EN

KERENA is an innovative boiling water reactor concept equipped with several passive safety systems. For the experimental verification of performance of the systems and for codes validation, the Integral Test Stand Karlstein (INKA) was built in Karlstein, Germany. The emergency condenser (EC) system transfers heat from the reactor pressure vessel (RPV) to the core flooding pool in case of water level decrease in the RPV. EC is composed of a large number of slightly inclined tubes. During accident conditions, steam enters into the tubes and condenses due to the contact of the tubes with cold water at the secondary side. The condensed water flows then back to the RPV due to gravity. In this paper two approaches for modeling of condensation in slightly inclined tubes are compared and verified against experiments. The first approach is based on the flow regime map. Depending on the regime, heat transfer coefficient is calculated according to specific semi-empirical correlation. The second approach uses a general, fully-empirical correlation. The models are developed with utilization of the object-oriented Modelica language and the open-source OpenModelica environment. The results are compared with data obtained during a large scale integral test, simulating loss of coolant accident performed at Integral Test Stand Karlstein (INKA). The comparison shows a good agreement. Due to the modularity of models, both of them may be used in the future in systems incorporating condensation in horizontal or slightly inclined tubes. Depending on his preferences, the modeller may choose one-equation based approach or more sophisticated model composed of several exchangeable semi-empirical correlations.

Słowa kluczowe

EN

condensation; Kerena; emergency condenser; Modelica; OpenModelica

PL

kondensacja; Kerena; kondensator awaryjny; Modelica; OpenModelica

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2017
• Tom: Vol. 38, no. 4
• Strony: 29–--51
• Opis fizyczny: Bibliogr. 20 poz., rys., tab., wz.

Twórcy

autor

Bryk R.

• Warsaw University of Technology, Institute of Heat Engineering, Nowowiejska 21/25, 00-665 Warszawa, Poland
• AREVA GmbH, Paul-Gossen-Strasse 100, 91052 Erlangen, Germany

autor

Schmidt H.

• AREVA GmbH, Paul-Gossen-Strasse 100, 91052 Erlangen, Germany

autor

Mull T.

• AREVA GmbH, Paul-Gossen-Strasse 100, 91052 Erlangen, Germany

autor

Wagner T.

• AREVA GmbH, Paul-Gossen-Strasse 100, 91052 Erlangen, Germany

autor

Ganzmann I.

• AREVA GmbH, Paul-Gossen-Strasse 100, 91052 Erlangen, Germany

autor

Herbst O.

• AREVA GmbH, Paul-Gossen-Strasse 100, 91052 Erlangen, Germany

Bibliografia

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