Method for calculating nuclear island variable working condition heat storage increment of pressurized water reactor nuclear power station

Abstract

The invention relates to a method for calculating a nuclear island variable working condition heat storage increment of a pressurized water reactor nuclear power station. The method is characterized by comprising the following steps: (1) establishing an overall energy balance equation of a pressurized water reactor nuclear power unit primary coolant loop, a steam generator secondary side loop anda nuclear reactor by utilizing an energy conservation principle, and analyzing the energy balance equation to obtain a key variable influencing the nuclear island variable working condition heat storage increment of the pressurized water reactor nuclear power unit; (2) mathematical modeling is carried out on the obtained key variables, and the influence quantity of the key variables on the heat storage capacity under the variable working conditions is calculated through the obtained mathematical model; and (3) summing the calculated values of all the key variable mathematical models to obtainthe increment of the heat storage capacity of the nuclear power unit under the variable working condition of the nuclear island, thereby completing the calculation. By means of the calculation method,the problem that the nuclear power unit does not have a real machine test is effectively solved, and the calculation method capable of obtaining the nuclear island variable working condition heat storage increment of the nuclear power unit is provided.

Description

technical field [0001] The invention relates to a method for calculating heat storage increment of a nuclear island of a pressurized water reactor nuclear power plant under variable operating conditions. Background technique [0002] As the installed capacity of nuclear power continues to increase, the proportion of nuclear power in the Yanhai power grid is increasing. In some provinces, nuclear power installed capacity has accounted for more than 50% of the total installed capacity in the province. The existing nuclear power units all have the function of primary frequency regulation, but due to the particularity of the nuclear power unit itself, the dead zone of the primary frequency regulation of nuclear power units operating in China is very large. Therefore, for power grids with a high proportion of nuclear power, the security and stability of the power grid has become very prominent. For safety considerations during the operation of nuclear power units, it is propose...

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Problems solved by technology

However, there is no special research on the primary frequency modulation capability of nuclear power units in China.

From a thermodynamic point of view, there is no research on the influence of nuclear power unit nuclear island heat storage variation on primary frequency regulation, and related theoretical calculations and analysis

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