spacer and mixing gridsResearches of hydrodynamic characteristics of coolant in VVER-1000 reactor mixed core of atomic power station «Temelin» 10/23/2015 2015 - #03 Thermal physics and thermal hydraulics Dmitriev S.M. Doronkov D.V. Polozkova E.N. Pronin A.N. Sorokin V.D. Khrobostov A.E.