Advanced Physical Startup Test for VVER‐1200 of Novovoronezh NPP: Technique and Some Results
26th Symposium of AER on VVER Reactor Physics and Reactor Safety (2016, Helsinki, Finland)
Reactor physics experiments and code validation continues
Abstract
ADVANCED PHYSICAL STARTUP TEST FOR VVER-1200 OF NOVOVORONEZH NPP: TECHNIQUE AND SOME RESULTSD.A. Afanasiev, Yu.A. Kraynov, A.A. Pinegin, S.V. Tsyganov NRC “Kurchatov Institue”ABSTRACTStartup physics tests intended for confirmation of design characteristics of the core loading and their compliance with safety analysis preconditions. The programme of startup tests for leading unit usually composed in a way to study as much as it possible neutron-physical characteristics in the safest condition of zero power. State-of-the-art safety analysis is now including computer codes that use three dimensional neutron kinetics and thermohydrolics models. For substantiation of such models, for its validation and verification there is a need in reactor experiments that implementing spatially distributed transients.When composing hot zero power physical startup programme for new VVER-1200 unit of Novovoronezh NPP we started from that statements. Several unconventional for VVER tests were developed for that programme. It includes measuring the worth for each of control rod groups and measuring of single rod worth form the inserted groups – test that models rod ejection event in some sense.Physical startup of unit 6 of Novovoronezh NPP with the first VVER-1200 took place in May 2016. During physical startup programme at hot zero power all planned new tests were performed. The presentation discusses new tests technique, its practical implementation, experimental equipment and some results obtained at the first VVER unit of Generation “3+”.26th Symposium of AER on VVER Reactor Physics and Reactor Safety 17 10 – 14 October 2016, Helsinki, Finland