NEA Mandates and Structures

Working Party on Scientific Issues of Reactor Systems (WPRS)

Chair(s): Kostadin IVANOV, United States
Secretary:  Ian HILL
Vice-Chair(s): Hakim FERROUKHI, Switzerland
Member(s):All NEA member countries
Full participant(s): European Commission
Under the NEA Statute
Observer(s)(International Organisation): International Atomic Energy Agency (IAEA)
By agreement
Date of creation:30 June 2004
End of mandate:30 June 2022

Mandate (Document reference):

Mandate (Document extract):

Extract from document [NEA/NSC/WPRS/DOC(2019)11]



Under the guidance of the Nuclear Science Committee (NSC), the Working Party will deal with reactor physics, radiation transport & dosimetry, core thermal-hydraulics, fuel performance, and associated multi-physics aspects for present and future nuclear power systems. As such, it will study the modelling of reactor systems, verification and validation and uncertainties quantification (VVUQ) associated with single-physics phenomena and liaise with the Expert Group on Multi-Physics Experimental Data, Benchmarks and Validation (EGMPEBV) for VVUQ of multi-physics applications.


Reactor types considered include, but are not limited to the following:

The WPRS will liaise closely with other relevant NEA working parties, especially those operating under the guidance of the NSC and Committee on the Safety of Nuclear Installations (CSNI), to ensure the respective work programmes are complementary, to provide advice and support where required and undertake common work where appropriate. In particular, close working relationships will be maintained with the NSC Working Party on Scientific Issues in Fuel Cycle (WPFC) and Working Party on Multi-scale Modelling of Fuels and Structural Materials for Nuclear Systems (WPMM), as well as with the CSNI Working Group on Analysis and Management of Accidents (WGAMA) and Working Group on Fuel Safety (WGFS). Activities of the WPRS will support efforts by the EGMPEBV in its efforts to establish validation guidance for multi-physics applications and design of experiments for multi-physics validation.


The WPRS will work with its expert groups to produce the deliverables contained in the expert group mandates given below.