Multi-compartment THAI+ test facility, Becker Technologies GmbH.

In the wake of the NEA THAI project, conducted in three phases from 2007 until 2019, a new project, THAI Experiments on Mitigation m...

PKL facility. Photo: FRAMATOME, Germany

The Primärkreislauf-Versuchsanlage (Primary Coolant Loop Test Facility [PKL]) is a facility owned and operated by Framatome GmbH (formerly AREVA NP) in Erlange...

Photo: RBHT Test Facility. US NRC.

Modelling reactor core behaviour under accident conditions with delayed re-introduction of cooling water (commonly referred to as reflood) is a challenge for safety...

PKL facility. Photo: FRAMATOME, Germany

The Experimental Thermal Hydraulics for Analysis, Research and Innovations in Nuclear Safety (ETHARINUS) project was launched in October 2020 to address knowle...

PANDA vessel assembly (construction phase, 1993), PSI.

The PANDA project was launched in July 2021, following the NEA HYMERES project series, to contribute to the extension of the database on large...

^{View of the ATLAS experimental loop. KAERI, Korea}

The Advanced Thermal-hydraulic Test Loop for Accident Simulation (ATLAS) is a thermal-hydraulic integral effect test facility for advanced light wate...

The Working Party on Scientific Issues and Uncertainty Analysis of Reactor Systems (WPRS) studies the reactor physics, fuel performance, and radiation transport and shielding in present and future nu...

Passive thermal-hydraulic systems are widely used in nuclear reactor safety and design. For example, primary circuits in existing boiling and pressurised water reactors are designed to take advantage...

The Expert Group on Reactor Coolants/Components Technology (EGCoCoT), operating under the auspices of the Working Party on Scientific Issues of Advanced Fuel Cycles (WPFC), launched an activity to pr...

Panda facility under construction. Photo courtesy of the Paul Scherrer Institute

HYMERES phases

First phase (2013-2016)

The main objective of the first phase of the Hydrogen Mitigation Experiments fo...

NEA's ETHARINUS joint project held a meeting of its programme review group on 27-28 June 2024 in Erlangen, Germany.

This report aims to establish the status of current 3D capabilities in T/H system codes, covering all aspects and limitations, including the equations and simplifications considered, the time and spa...

Under the guidance of the NEA Nuclear Science Committee (NSC), the Working Party on Scientific Issues and Uncertainty Analysis of Reactor Systems (WPRS) studies the reactor physics, fuel performance,...

The NEA ATLAS3 and NEA ETHARINUS projects organised a workshop on 7-9 November 2023. 

Scheme of the PSB-VVER facility, EREC

The NEA PSB-VVER project provided unique and useful experimental data for code validation using the PSB-VVER test facility. The PSB-VVER facility is a large-scal...

Scheme of the ROSA LSTF facility, JAEA

The Rig-of-safety Assessment (ROSA) Project aimed to resolve issues in thermal-hydraulics analyses relevant to light water reactor (LWR) safety using the Japa...

Scheme of the THAI+ facility, Becker Technologies.

The experimental investigations carried out in the frame of the THAI (2007-2009), THAI-2 (2011-2014) and THAI-3 (2016-2019) projects contributed s...

Scheme of the PKL facility, Framatome GmbH.

The SESAR Thermal-hydraulics (SETH) Project began in 2001 and consisted of thermal-hydraulic experiments in support of accident management, which were ca...

View looking down onto the LOFT reactor

The Loss-of-fluid Test (LOFT) Research Programme was originally set up by the US Nuclear Regulatory Commission. Part of the programme was later broadened int...