05.12.2018_No241 / News in Brief

Russia Completes Longevity Testing Of Modified Fuel For Loviisa And Paks VVERs

Uranium & Fuel

5 Dec (NucNet): Russian nuclear engineering company Gidropress has completed longevity testing of fuel assembly models that it says will improve the performance of Russian-supplied VVER-440 reactor units in Finland and Hungary.

Gidropress, a subsidiary of state nuclear corporation Rosatom, said this new modification of second-generation nuclear fuel has been developed for the Loviisa nuclear station in Finland and the Paks nuclear station in Hungary under contracts signed earlier this year with Russian nuclear fuel company TVEL, also a Rosatom subsidiary.

First deliveries of the fuel assemblies to Loviisa and Paks are expected to begin in 2021-2022.

Gidropress said the behaviour of the new fuel assemblies was studied for 1,500 hours with parameters as close as possible to reactor conditions in terms of consumption, temperature, pressure and pressure pulsations

The test results have already been presented to Fortum, the operator of Loviisa, and to Paks and the Hungarian regulator HAEA.

The modified fuel allows for an increase in the volume of coolant inside the reactor core and optimisation of the hydro-uranium ratio, which will improve the technical and economic performance of Loviisa and Paks units, Gidropress said.

Related reports in the NucNet database (available to subscribers):

  • Advanced Russian Fuel Assemblies Loaded At Czech Republic’s Temelín-2 (News in Brief No.167, 23 August 2018)

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NucNe

Editor:

David Dalton

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