Using Digital Acoustic Models to Create a Nuclear Reactor Twin

In this paper the urgent problem of using a digital acoustic model (DAM) to create a digital acoustic model of the reactor twin for VVER (VVER DAMNRT) with VVER-1200 is solved. An approximate analytical method for solving the nonlinear differential equation of motion of the autogenerator is proposed, which provides an adequate description of the wave processes recorded by pressure pulsation sensors (PPS), accelerometers and direct charge sensors (DCS). The results of measurements of the ASW frequencies in the RP with VVER-1200 and the calculation practically coincide. The main result is the experimental proof of the validity of K.N. Proskuryakov's hypothesis on the existence of a previously unknown property of the VVER reactor connected to pipelines to simultaneously generate several ASWs that control neutron-physical, thermal-hydraulic and mechanical noise. It was concluded that VVER-1200 DAMNRT is the only possible model corresponding to the original, having no analogues in acoustics and nuclear fields and is many years ahead of similar developments by ANL and other foreign organizations.