РАСЧЕТНО-ЭКСПЕРИМЕНТАЛЬНОЕ ИССЛЕДОВАНИЕ НАПОРНО- РАСХОДНОЙ ХАРАКТЕРИСТИКИ ЭЖЕКТОРА ДЛЯ СИСТЕМЫ АВАРИЙНОГО ОХЛАЖДЕНИЯ АКТИВНОЙ ЗОНЫ АЭС С ВВЭР 1 Блинков В.Н., 1 Мелихов В.И., 1 Мелихов О.И., 1 Парфенов Ю.В., 1 Никонов С.М., 1 Елкин И.В., 2 Трубкин Е.И., 3 Якуш C.Е.

The calculative-experimental investigation of the head-fl ow characteristic of the ejector for emergency core cooling system of the Nuclear Power Plant with water-water power reactor (WWER) is presented in the paper. The unit «pump-ejector» is planning to be installed in the system of the accidental and plan cooling of the reactor primary circuit of the innovative NPP projects. This unit consists of the high pressure pump and water-water ejector on the head side of the pump. The experimental results of the head-fl ow ejector characteristic obtained in the JSC “EREC” are presented in the paper. The calculation results for head-fl ow characteristic obtained by the engineering method presented in [3] are in a good agreement with the experimental ones. These results predict the occurrence of the cavitation regime in the mixing chamber of the ejector. The cavitation is accompanied with the so-called regime of the limited fl ow rate of the fl uid which is characterized by the phenomenon, that the decreasing of the pressure after the cavitation section is not accompanied with the increasing of the fl ow rate. The space distribution of the hydrodynamic parameters in the ejector was calculated with REMIX [2] code for different boundary conditions of the experiment.