STATE OF THE ART AND STAKEHOLDER OUTREACH
Objectives:
- Document the most important FIV phenomena, relevant for the operational safety of nuclear reactors.
- Review currently available experimental data and numerical methods for the analysis of these phenomena.
- Stakeholders’ outreach to identify industry needs and regulatory expectations in terms of tools and methods for the analysis of FIV phenomena.
- Specify requirements for advanced numerical methods and tools for the analysis of FIV phenomena.
FLOW-INDUCED VIBRATIONS IN FUEL ASSEMBLIES
Objectives:
- Develop advanced simulation methods and tools to facilitate understanding of FIV in Fuel Assemblies
- Utilize existing experimental data on FIV under axial flow for validation of numerical simulation tools
- Assess simulation approaches with respect to physical models, numerical schemes, and coupling algorithms to simulations of FIV in Fuel Assemblies and derive guidance for practical use
- Increase the efficiency of coupled FSI simulations through the development and implementation of simplified models to represent complex structures and the implementation of efficient coupling strategies
- Provide the input basis for the development of Reduced-Order Models in both fluid and structural domains
FLOW-INDUCED VIBRATIONS IN STEAM GENERATORS
Objectives:
- Development of methods to provide a reliable assessment of structural vibrations, occurring in heat exchangers and Steam Generators under cross-flow conditions
- High-resolution computations and utilization of existing and generation of new, high-resolution experimental data on FIV under single phase cross flow for validation of the numerical tools
- Development and implementation of simplified models of the investigated structures (tube bundles) to increase the overall efficiency of the FSI calculations.
- Validation and assessment of the advantages and drawbacks of the applied simulation approaches with respect to turbulence models, numerical schemes, coupling algorithms etc. for the simulation of FIV in cross-flow conditions
- Provision of input to WP5 for the development of Reduced-Order Models
FLOW-INDUCED VIBRATIONS IN MULTIPHASE FLOWS
Objectives:
- Development of advanced simulation tools to provide a deeper understanding of two-phase flows induced vibrations of nuclear reactor components and their validation against available experimental results.
- Utilization of existing and new experimental data on two-phase FIV under axial and cross-flow for validation of numerical simulation tools.
- Increasing the efficiency of coupled FSI simulations through the development and implementation of simplified structural models to represent complex structures of Nuclear Power Plants components and implementation of efficient coupling strategies.
- Assessment of simulation approaches with respect to the applicability of corresponding underlying two-phase models, numerical schemes, coupling algorithms, etc. for the FIV simulation, and deriving guidance for practical use.
FAST-RUNNING METHODS, UNCERTAINTY QUANTIFICATION AND BEST PRACTICE GUIDELINES
Objectives:
- Development and implementation of fast-running FSI methods for efficient analysis of FIV phenomena
- Validation of fast-running methods and identify their limitations
- Development, implementation and application of approaches to quantify the uncertainty in the FIV evaluation in reactor components
- Elaboration of guidance to vendors, operators and regulators on robust and efficient FIV assessments
EDUCATION, TRAINING AND DISSEMINATION
Objectives:
- Training of young scientists, master and PhD students on Fluid Structure Interaction related to nuclear applications
- Development of educational material for FIV
- Presentation and distribution of the BPGs developed in WP5
- Dedicated code training with code benchmark
- Communication and Dissemination
- Elaboration of the detailed plan and of the communication material
- Organization of an international event with key stakeholders
PROJECT MANAGEMENT
Objectives:
- Carry out an effective technical, scientific, legal, financial, and administrative coordination, establishing the mechanisms and management procedures to that end.
- An appropriate governance structure and internal communication methods.
- Project monitoring & risk management.
- Project Quality Plan, Data Management Plan, Gender Action Plan.
- Interactions with the Advisory and User Group.
- Enforcing gender equality.
ETHICS REQUIREMENTS
Objectives:
- The objective is to ensure compliance with the 'ethics requirements' set out in this work package.
![]()
