Timothy E. VALENTINE, United States
Evgeny IVANOV, France|
|Member(s):||All NEA member countries*|
|*Russian Federation suspended pursuant to a decision of the OECD Council.|
Under the NEA Statute
International Atomic Energy Agency (IAEA)|
|Date of creation:||01 April 2021|
|End of mandate:||31 March 2024|
Mandate (Document reference):
Mandate (Document extract):
Extract from document [NEA/NSC/WPRS/DOC(2021)2]
As a result of the prioritisation process, a reorganisation of NSC activities was performed under the guidance of the NSC Bureau. This has resulted in the disbandment of the NSC Expert Group on Multi-Physics Experimental Data, Benchmarks and Validation (EGMPEBV), the Expert Group on Radiation Transport and Shielding (WPRS-RTS), the Expert Group on Reactor Physics and Advanced Nuclear Systems (WPRS-RPANS) and the Expert Group on Uncertainty Analysis in Modelling (WPRS-UAM). Two new bodies have been created to replace them: the Expert Group on Physics of Reactor Systems (WPRS-EGPRS) and the Expert Group on Reactor Systems MUlti-Physics (WPRS-EGMUP).
Under the guidance of the Working Party on Scientific Issues and Uncertainty Analysis of Reactor Systems (WPRS), the Expert Group on Reactor Systems MUlti-Physics (EGMUP) will advance the state-of the-art in establishing processes and procedures for certifying experimental data and benchmarking multi-physics multi-scale modelling and simulation (M&S). Coupled behaviours of two or more of the following physics will include, but are not limited to the following:
Multi-physics aspects of both steady-state and transients conditions of existing and advanced nuclear systems will be examined along with uncertainty quantification and propagation through different scale (multi-scale M&S) and different physics phenomena (multi-physics M&S).
The Expert Group on Reactor Systems MUlti-Physics (EGMUP) will provide recommendations to the WPRS and the nuclear community on the scientific development needs (data and methods, validation experiments, scenario studies) for multi-physics and multi-scale M&S, including sensitivity and uncertainty methodology for analysis of different reactor systems and scenarios. Guidance and processes to certify experimental data for multi-physics multi-scale M&S and to apply this data to the benchmarking of models will be developed.
To fulfil the above the expert group will provide the following:
data (e.g. geometry, materials);
To support its activities, the group will collect and evaluate multi-physics data from available integral facilities and Nuclear Power Plant (NPP) experimental data. Analytical and numerical benchmarking will also be used to fulfil the objectives.
The EGMUP will report to the Working Party on Scientific issues and Uncertainty Analysis of Reactor Systems (WPRS). The EGMUP will meet once per year, with additional meetings in support of particular activities such as task forces reporting to the EGMUP.
Links to other NEA bodies and international projects
The EGMUP will report to the Working Party on Scientific Issues and Uncertainty Analysis of Reactor Systems (WPRS) and will liaise closely with other relevant NEA bodies, in particular the WPRS Expert Group on Physics of Reactor Systems (EGPRS) and the Expert Group on Reactor Core Thermal-hydraulics and Mechanics (EGTHM) as well as those bodies operating under the guidance of the Nuclear Science Committee (NSC) and the Committee on the Safety of Nuclear Installations (CSNI). The objective will be to ensure that the respective programmes are complementary and to provide advice and support where required and undertake common work where appropriate. Links with the NSC Working Party on Multi-scale Modelling of Fuels and Structural Materials for Nuclear Systems (WPMM)1 will assist with issues related to fuel performance and structural materials analysis. Close collaboration with the NSC Working Party on Scientific Issues of Advanced Fuel Cycles (WPFC) and its expert groups will be maintained.
The deliverables of the EGMUP are the following:
1 Change of name forthcoming for the WPMM following the NSC prioritisation process: Working Party on Scientific Issues of Nuclear Fuels and Materials (WPFM).