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research-article

Cycle Calculations of a Small-Scale Heat Removal System with Supercritical CO2 as Working Fluid

[+] Author and Article Information
Marcel Straetz

University of Stuttgart, Institute of Nuclear Technology and Energy Systems (IKE) Pfaffenwaldring 31, D-70569 Stuttgart, Germany
marcel.straetz@ike.uni-stuttgart.de

Joerg Starflinger

University of Stuttgart, Institute of Nuclear Technology and Energy Systems (IKE) Pfaffenwaldring 31, D-70569 Stuttgart, Germany
joerg.starflinger@ike.uni-stuttgart.de

Rainer Mertz

University of Stuttgart, Institute of Nuclear Technology and Energy Systems (IKE) Pfaffenwaldring 31, D-70569 Stuttgart, Germany
rainer.mertz@ike.uni-stuttgart.de

Dieter Brillert

University Duisburg-Essen Lotharstraße 1, D-47057 Duisburg, Germany
dieter.brillert@uni-due.de

1Corresponding author.

ASME doi:10.1115/1.4039884 History: Received September 22, 2017; Revised March 15, 2018

Abstract

In case of an accident in a nuclear power plant with combined initiating events, (loss of ultimate heat sink and station blackout) an additional heat removal system could transfer the decay heat from the core to an ultimate heat sink. One specific additional heat removal system, based upon a Brayton cycle with supercritical CO2 as working fluid, is currently investigated within the EU-funded project “sCO2-HeRo” (supercritical carbon dioxide heat removal system). It serves as a self-launching, self-propelling and self-sustaining decay heat removal system used in severe accident scenarios. Since this Brayton cycle produces more electric power than it consumes, the excess electric power can be used inside the power plant, e.g. for recharging batteries. A small-scale demonstrator is attached to the PWR glass model at Gesellschaft für Simulatorschulung (GfS), Essen, Germany. In order to design and build this small-scale model, cycle calculations are performed to determine the design parameters from which a layout can be derived.

Copyright (c) 2018 by ASME
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