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Fuel assemblies for VVER reactor

TVS-493 (jacketed) Fabricated for Novovoronezh NPP – the first ever nuclear power plant operating nuclear reactor VVER-1000
Main characteristics:
Fuel elements quantity 317
Fuel mass 499 kg
Fuel assembly power (thermal) 19,9 MWt
Service life 5 years

Design features

The load-bearing structural element is a jacket of VVER-1000 modified fuel assembly (UTVS) (modified fuel assembly with zirconium spacer grids and a load-bearing skeleton)


VVER-1000 UTVS Manufactured for Busher NPP (Iran), Kudankulam NPP (India), Tianwan NPP (China)
Main characteristics:
Fuel elements quantity 311
Fuel mass 489,8 kg
Fuel assembly power (thermal) 18,4 MWt
Service life 5 years

Design features

fuel assembly skeleton consists of spacer grids floating on the load-bearing skeleton.


TVS-2М of VVER-1000 type (with rigid skeleton) Manufactured for Balakovo NPP, Rostov NPP, Tianwan NPP (China)
Main characteristics:
Fuel elements quantity 312
Fuel mass 527 kg
Fuel assembly power (thermal) 19,1 MWt
Service life 7 years

Design features

Fuel assembly skeleton consists of spacer grids welded to guide channels; extended core length.


VVER-1000 TVSA (alternative) Manufactured for NPP in Ukraine, Kozloduy NPP (Bulgaria)
Main characteristics:
Fuel elements quantity 312
Fuel mass 499,0 kg
Fuel assembly power (thermal) 18,4 MWt
Service life 5 years

Design features

fuel assembly skeleton is formed by the corners welded to spacer grids and connected with the bottom nozzle.


VVER-1200  Manufactured for Novovoronezh-2 NPP
Main characteristics:
Fuel elements quantity 312
Fuel mass 534,1 kg
Fuel assembly power (thermal) 19,6 MWt
Service life 7 years

Design features

it’s a modification of the fuel assembly TVS-2M for VVER-1200 reactor; extended core length as compared to TVS-2M.