Assessment of the Model for Calculating the Mass of the Coolant of the First Circuit of the Nuclear Power Plant with VVER-1000 Units

During the design of the nuclear power plant with VVER-1000 units, which today form the basis of the nuclear power industry of Ukraine, the development of information and computing systems (IСS) was insufficient to solve many tasks due to the small capacities of computing systems. Currently, newer ones, the computing capabilities of which are thousands of times greater than their predecessors, have replaced many IСS. IСS download currently does not exceed 1 %...2 %, this is due to the use of simplified models. A model is proposed that adequately describes the considered processes and can work in real time, which significantly increases the range of use. It has a small computational effort, so it can be implemented on the existing IСS. A method has been proposed which, as a result of testing, has shown its effectiveness and, in some cases, higher accuracy and resolution.