Experiences with 15m cycles in Paks NPP
26th Symposium of AER on VVER Reactor Physics and Reactor Safety (2016, Helsinki, Finland)
Fuel management issues
Abstract
EXPERIENCES WITH 15M CYCLES IN PAKS NPPImre Nemes, István Pós, Tamás Parkó Paks NPP Ltd,HungaryABSTRACTUnits of Paks NPP are under transition from 12 to 15 mounts cycles in years 2015 and 16. Unit 2 and 3 started the 1st long cycles in 2015, Unit 1 and 4 in 2016. 4.7% enriched fuel containing 6 Gd pins was introduced to provide reactivity reserve for longer operation. During start-up measurements and normal operation reactor physical parameters was measured and compared to calculated ones. Assembly head coolant mixing model was checked as well as parameters of neutronic models. The presentation summarises and analyse all results concerning introduction of long cycles and 4.7% enriched fuel.26th Symposium of AER on VVER Reactor Physics and Reactor Safety 22 10 – 14 October 2016, Helsinki, Finland