INNOVATIVE SCO2-BASED HEAT REMOVAL TECHNOLOGY FOR AN INCREASED LEVEL OF SAFETY OF NUCLEAR POWER PLANTS

Livrables

Report on the definition of initial and boundary conditions for the SBO accident

The deliverable will provide the different elements of the accident scenarios that will be used in the simulations made in the other tasks. The description will include list of safety parameters to be included in simulations, together with acceptance criteria. The deliverable will permit to determine all the parameters to consider in the following tasks of simulations.

sCO2-4-NPP symposium

Symposium at the end of the project targeting mainly NPP operators to disseminate sCO24NPP results and roadmaps

Test results of the improved small-scale turbomachine

Results of the testing of the improved machine

Preliminary design and models of the sCO2-4-NPP heat exchangers

Release of the preliminary design and models of the sCO2-4-NPP heat exchangers (heat recovery exchanger and heat sink exchanger).

Project public website

Public website will provide information about the project, publications, news and events.

End-user workshop

First workshop organised to discuss project results and developments with the enduser group

sCO2 System integrated in PWR-simulator

The sCO2 system code is integrated into the simulator the performance is stable for running transients and to demonstrate the feedback on the NPPprocess Startup shutdown and control as well as the monitoring of selected internal parameters of the sCO2system can be done via a simple interface on instructors station

Fast running version of the sCO2 heat removal system for implementation in control logic of PWR simulator

This deliverable will consist of a realtime simulation model of the sCO2 heat removal system to be integrated into the existing NPP simulator KONVOI

Thermodynamic performance of the heat recovery system integrated into the plant

This deliverable aims to determine the main characteristics of the systems operation using a thermodynamic calculation code This deliverable will have special attention for interaction of the sCO2 system with the rest of the NPP

Representative transients of a European PWR equipped with sCO2-system monitored and assessed

The report will contain the documentation of the transientsaddress possible problems to be solved in further development of the sCO2system regarding undesired feedback or necessary actions to be implemented compare the results from the simulator to the numerical calculations done with ATHLET or CATHARE

Design bases and analyses for system and components

In this deliverable NRI and EDF for the system and components will be defined the design bases with relevant regulations for selected reactor type. The system and components will be analysed on the internal and external hazards. The Equipement Qualification (EQ) is generally established on a component by component basis. When the components are mechanically and electrically interconnecting as a functional system, the complete system is qualified if the performance functions of the individual devices are properly defined and qualified. This deliverable intends to establish the requirements for the EQ for the components and the system only.

Report on the validation status of codes and models for simulation of sCO2-HeRo loop

The deliverable contains simulation results of ATHLET, ATHLET/Modelica and CATHARE simulations of the sCO2-HeRo cycle. The models and possible improvements are described. The code results are compared among each other.

Design concept with auxiliary systems

This deliverable will define the entire system design with all the necessary auxiliaries power supply CO2 storage etc

Independent review of the sCO2-4-NPP system licensing roadmap for real nuclear power plant

In this deliverable the results of the independent review of the requirements and criteria set up in D32 through D34 will be given Based on the review the compliance of the sCO24NPP with the predefined requirements will be given

Requirements for reference plant modifications for installation of sCO2-4-NPP

In this deliverable NRI and EDF will provide the set of requirements for the implementation of the system in the nuclear power plant (NPP) in selected reactor type (VVER for NRI and PWR for EDF). This deliverable will provide the necessary data to identify the required system functions critical to other system devices, interfaces and the overall plant.

Interim technical review

Internal project technical review meeting assessing progress against workplan.

First version of sCO2-4-NPP exploitation plan

Report encompassing the exploitation plans for the sCO2-4-NPP system and system components including technological, regulatory, financial and organisational (business plan) roadmaps for reaching TRL9.

Qualification methodology for Heat Exchanger and turbomachinery according to NPP requirements

Release of the report which includes the qualification strategy

sCO2-4-NPP exploitation plan

Final version of the sCO24NPP exploitation plan and technological regulatory financial and organisational business plan roadmaps to reach TRL9

Summary of modifications on the reference plant after integration of the heat recovery system

It will summarise all the necessary modifications plans controlcommand etc on the reference unit as well as the main simulated operating data It thus provides an introduction to future regulatory requirements by identifying some of the changes that will need to be justified to the safety authorities

Conceptual design of the sCO2-4-NPP turbomachine

Release of the final conceptual design of the sCO24NPP turbomachine with the final dimensions of the machine with the included components such as bearings generator seals etc

Final conceptual design of the Heat Recovery Exchanger

Release of the report of the final designThis deliverable will present also some specific results about the model of steam condensation in small channels and the mechanical design strategy according to initial and boundary conditions of sCO24NPP specifications and legislation requirements

Requirements for the preoperational and initial start-up test programmes for the system

In this deliverable NRI will prepare the preoperational and initial start-up test programs for the system including technical specifications will be prepared. The report will be involved limiting conditions of operation and periodic surveillance testing, inspections and analyses for the system.

Report on identification of the regulatory elements for design of components and system

In this deliverable the main regulatory requirements for design of components and system will be given.

Final conceptual design of the Heat Sink Exchanger

Release of the report of the final design This deliverable will also present some specific results about the channel design for the air side and the design strategy for sCO2s channels and flow area

Publications

Turbomachine operation with magnetic bearings in supercritical carbon dioxide environment

Auteurs: Hacks, A.J.; Brillert, D.
Publié dans: Int. J. Turbomach. Propuls. Power, 2022, ISSN 2504-186X
Éditeur: MDPI
DOI: 10.3390/ijtpp7020018

Experimental Data of Supercritical Carbon Dioxide (sCO2) Compressor at Various Fluid States

Auteurs: Alexander J. Hacks, Ihab Abd El Hussein, Haikun Ren, Sebastian Schuster, Dieter Brillert
Publié dans: J. Eng. Gas Turbines Power, Numéro Apr 2022, 144(4), 2022, ISSN 0742-4795
Éditeur: American Society of Mechanical Engineers
DOI: 10.1115/1.4052954

Simulation, analysis and control of a self-propelling heat removal system using supercritical CO2 under varying boundary conditions

Auteurs: Markus Hofer, Haikun Ren, Frieder Hecker, Michael Buck, Dieter Brillert, Jörg Starflinger
Publié dans: Energy, Numéro SI: Selected papers from the 4th European Conference on Supercritical CO2 for Energy Systems, 2022, ISSN 0360-5442
Éditeur: Pergamon Press Ltd.
DOI: 10.1016/j.energy.2022.123500

Conceptual design, optimisation and qualification of highly efficient brazed plates and fins heat exchangers for heat removal sCO2 Brayton Cycle to increase the safety of nuclear power plants

Auteurs: Tioual-Demange, S., Voirin, V., Hofer, M., Hecker, F., Buck, M., Starflinger, J.
Publié dans: 4th European sCO2 Conference for Energy Systems, Numéro 1, 2021, Page(s) p. 274-290
Éditeur: DuEPublico: University of Duisburg-Essen Publications online
DOI: 10.17185/duepublico/73971

Mean-line analysis for supercritical CO2 centrifugal compressors by using enthalpy loss coefficients

Auteurs: Ren, Haikun; Hacks, Alexander; Schuster, Sebastian; Brillert, Dieter
Publié dans: 4th European sCO2 Conference for Energy Systems, Numéro 1, 2021, Page(s) p. 68-77
Éditeur: DuEPublico: University of Duisburg-Essen Publications online
DOI: 10.17185/duepublico/73948

Operational analysis of a self-propelling heat removal system using supercritical CO2 with ATHLET

Auteurs: Hofer, Buck, M., Starflinger, J.
Publié dans: 4th European sCO2 Conference for Energy Systems, Numéro 1, 2021, Page(s) p. 400-410
Éditeur: DuEPublico: University of Duisburg-Essen Publications online
DOI: 10.17185/duepublico/73983

Industrial Technical Development and Qualification of Highly Efficient Stainless Steel Plates and Fins Heat Exchanger for Heat Removal Supercritical CO2 Brayton Cycle Applied to Nuclear Power Plants

Auteurs: Sarah Tioual-Demange, Gaëtan Bergin, Thierry Mazet, Luc de Camas
Publié dans: Fluids Engineering Division Summer Meeting (ASME FEDSM 2020), 2020, ISBN 978-0-7918-8371-6
Éditeur: Fluids Engineering Division Summer Meeting
DOI: 10.1115/fedsm2020-20205

Impact of volumetric system design on compressor inlet conditions in supercritical CO2 cycles

Auteurs: Alexander Johannes Hacks, Sebastian Schuster, Dieter Brillert
Publié dans: Proceedings of Global Power & Propulsion Society, 2020
Éditeur: GPPS
DOI: 10.33737/gpps20-tc-177

Lessons from testing the sCO2-HeRo turbo-compressor-system

Auteurs: S. Schuster, A. Hacks, D. Brillert
Publié dans: The 7th International Supercritical CO2 Power Cycles Symposium, 2020, Page(s) Paper 15
Éditeur: University of Duisburg-Essen, Chair of Turbomachinery

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