First Russian-made experimental nuclear fuel assemblies based on accident-tolerant fuel (ATF) have been loaded for testing into the water loops of MIR research reactor at the State Research Institute of Atomic Reactors in Dimitrovgrad, Ulyanovsk Region. This work is a part of the project of TVEL Fuel Company of ROSATOM to develop Russian accident tolerant fuel resistant to severe beyond-design basis accidents, and bring it to the market. 

Two experimental fuel assemblies, manufactured at Novosibirsk Chemical Concentrates Plant (a subsidiary of TVEL Fuel Company), consist either of VVER or PWR geometry fuel rods with four different combinations of cladding materials and fuel matrix. Fuel pellets are made of one of the two materials, either traditional uranium dioxide or uranium-molybdenum alloy with increased density and thermal conductivity. The fuel rods cladding is either a zirconium alloy with chromium coating or a chromium-nickel alloy.