The NEA ROSA-2 project aimed to resolve key light water reactor (LWR) thermal-hydraulics safety issues highlighted from the first phase of the project by using the ROSA/large-scale testing facility (LSTF) at the Japan Atomic Energy Agency.
In particular, the ROSA-2 Project focused on the validation of simulation models and methods for the following complex phenomena of high-safety relevance for thermal-hydraulic transients in design basis events (DBE) and beyond-DBE:
The experimental program was intended to provide a valuable and broadly usable database to achieve the above cited objectives. The NEA ROSA-2 Project consisted of six LSTF experiments that mainly included two groups of experiments which are intermediate break loss-of-coolant (LOCA) accidents and steam generator tube rupture (SGTR) accidents. One of the six experiments may have been directed to a different target following a discussion with the project partners. The NEA ROSA-2 Project ran from 01 April 2009 to 31 March 2013.
The project was supported by safety organisations, research laboratories and industry from the following countries: Belgium, the Czech Republic, Finland, France, Germany, Hungary, Japan, Korea, Spain, Sweden, Switzerland, the United Kingdom and the United States.
Last reviewed: 23 October 2013