WPRS Expert Group on Reactor Core Thermal-Hydraulics (EGRCTH)


Created in 2019, under the guidance of the Working Party on Scientific Issues of Reactor Systems (WPRS) the expert group will perform specific tasks associated with core thermal-hydraulics aspects of present and future nuclear power systems. Reactor types considered include, but are not limited to, the following:

Coupling issues between core thermal-hydraulics and other aspects considered include, but are not limited to, the following:


To provide expert advice to the WPRS and the nuclear community on the development needs (data and methods, validation experiments, scenario studies) for multi-scale core thermal-hydraulics modelling and simulation of existing and proposed nuclear reactor systems. A key activity associated with this objective is the identification and preservation of appropriate experimental data. Tthe expert group will provide member countries with the guidance and processes for certifying experimental data for its use as a stand-alone core thermal-hydraulic validation or for uses as part of validation pyramid of multi-physics modelling and simulation tools.

The group will provide specific technical information regarding:

The expert group will monitor, steer and support the continued development of the TIETHYS database. The expert group also will facilitate the dissemination of technical information and knowledge through activities such as workshops, benchmark studies and training activities.

Recent/current activities

Working documents

EGRCTH working area (password protected | reminder)

Recent reports/benchmarks

Meetings, workshops and conferences

Related links

OECD Nuclear Energy Agency activities


For more information, please contact: Ian Hill

Last reviewed: 20 June 2019