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Generation IV Reactors

Published on 3 October 2020

​Generation IV International Forum & Reactor Concepts

GIF meetings began in January 2000 when the U.S. Department of Energy’s Office of Nuclear Energy, Science and Technology convened a group of senior governmental representatives from the original nine countries to begin discussions on international collaboration in the development of Generation IV nuclear energy systems. Generation IV designs will use fuel more efficiently, reduce waste production, be economically competitive, and meet stringent standards of safety and proliferation resistance. With these goals in mind, some 100 experts evaluated 130 reactor concepts before GIF selected six reactor technologies for further research and development. These include the Gas-cooled Fast Reactor (GFR), Lead-cooled Fast Reactor (LFR), Molten Salt Reactor (MSR), Supercritical Water-cooled Reactor (SCWR), Sodium-cooled Fast Reactor (SFR) and Very High Temperature Reactor (VHTR).

Since 2009, thanks to the release of CATHARE 2 V2.5_2, the CATHARE code has evolved in a reliable system tool able to study a large number of Gen IV reactor concepts in the scope of a best-estimate code used for thermal–hydraulic nuclear safety analyses.

​Gas-cooled Fast Reactor (GFR)

Several GFR concepts have been studied with CATHARE including GFR600, GFR2400 or ALLEGRO. Below, a Loss Of Coolant Accident (LOCA) occuring in the GFR2400 concept is simulated by coupling CATHARE for the primary circuit and TrioCFD for the containment.

Videogfr_couplage.mp4

Sodium-cooled Fast Reactor (SFR)

Several SFR concepts and reactors have been studied with CATHARE including RAPSODIE, PHENIX, SUPERPHENIX, EFR or ASTRID. Below, a Loss Of Flow Accident (LOFA) occuring in the ASTRID concept is calculated by coupling CATHARE for the piping and heat exchangers, TrioMC for the core and TrioCFD for the plenums.

Videoulof_2d.mp4

 

​Very High Temperature Reactor (VHTR)

Several VHTR concepts have been studied with CATHARE, including a VHTR coupled with a hydrogen production plantor ANTARES.