Development of Fuel Cycles With New Fuel for VVER‐440. Fuel Rods with 8.9 mm External Diameter: Preliminary Assessment of Operating Efficiency
26th Symposium of AER on VVER Reactor Physics and Reactor Safety (2016, Helsinki, Finland)
Fuel management issues
Abstract
DEVELOPMENT OF FUEL CYCLES WITH NEW FUEL FOR VVER-440. FUEL RODS WITH 8.9 MM EXTERNAL DIAMETER: PRELIMINARY ASSESSMENT OF OPERATING EFFICIENCYА. Gagarinskiy, A. Lazarenko.NRC «Kurchatov institute», Moscow, RussiaABSTRACTEver since VVERs-440 have been introduced, their fuel assemblies are subject to ongoing improvements.Works intended to optimize the basic neutronic parameters of VVER-440 optional assemblies have started more than a decade ago.Until now, the basic structural parameters of fuel, such as rod diameter, have never changed (even in case of transition from the second to the third generation of fuel assemblies).The paper focuses on the calculated estimates of basic neutron-physical characteristics of the fuel cycle with fuel assemblies equipped with fuel rods which have reduced diameter up to 8.9 mm.26th Symposium of AER on VVER Reactor Physics and Reactor Safety 25 10 – 14 October 2016, Helsinki, Finland