Large-scale test facility (KMS)
The KMS test facility is a full-scale model of NPP containment with VVER reactors. It was designed accounting for the advanced world’s and national experience in simulating accident scenarios of VVER NPPs.
The large-scale facility is intended for:
- Conduction of verification experiments for modern 3D computer codes used to describe thermo-hydraulic processes inside containment during NPP accidents;
- Testing and verification of design concepts for passive safety systems in new generation VVER NPPs;
- Conduction of experiments to demonstrate hydrogen safety inside NPP containments using helium as hydrogen simulant.
| Containment characteristics | |||
| Material | St09G2S steel of Russian grade | ||
| Diameter, m | 12.0 | ||
| Height of cylindrical element, m | 10.9 | ||
| Total weight of metal structures, t | 126 | ||
| Volume (air), m3 | 1830 | ||
| Number of compartments | 11 | ||
| Maximum pressure, MPа | 0.5 | ||
| Maximum fluid temperature, °С | 150 | ||
| Fluid injection into containment | |||
| Steam | pressure, MPа | 0.5 | |
| maximum temperature, °С | 150 | ||
| maximum flow rate, t/h | 1.5 | ||
| Air | pressure, MPа | 0.7 | |
| maximum flow rate, nm3/h | 500 | ||
| Helium | total volume (in ramp), nm3 | 240 | |
| maximum flow rate, nm3/h | 30 | ||
| Modeling scale | |||
| VVER-640 | VVER-1200 | VVER-1500 | |
| Volume | 1:27 | 1:41 | 1:46 |
| Linear | 1:3 | 1:3.3 | 1:3.6 |
The test facility containment models the containment of VVER-640 NPP and consists of a metal cylindrical shell 12 m in diameter with a hemispherical removable dome as a superstructure and a steel-faced reinforced concrete structure as a substructure.
The inner surface of the KMS containment is thermally insulated with basalt needle felt mats 70 mm in thickness, which ensures meeting the requirements for steam-gas fluid temperature and pressure inside the containment during experiments.
