Determination of Reactor Parameters During Start Up Test at the TIANWAN NPP, Unit 1
16th Symposium of AER on VVER Reactor Physics and Reactor Safety (2006, Bratislava, Slovakia)
Core Operation, Experiments and Code Validation
Unit 1 of Tianwan NPP with VVER-1000 reactor reached the first criticality at December 20 of 2005. Series of start up experiments were carried out under scientific advisory of RRC “Kurchatov Institute” specialists. At the Hot Zero Power state the reactivity coefficients, control rod group and scram worth were measured and symmetry of the core loading and power reactivity effect due to reaching 1% of nominal were assessed.
Paper describes in brief special features of experiments and presented some results obtained at a measurements.