Operation method of voltage stabilizer electric heater

Abstract

The invention relates to the technical field of nuclear power station electrical maintenance, in particular to an operation method of a voltage stabilizer electric heater. The operation method comprises the steps that the voltage stabilizer electric heaters are equally divided into a plurality of intervals, one electric heater is selected from each interval to form a group, and W groups are formed; in the first period, one group of voltage stabilizer electric heaters is selected and marked as a long-term group of electric heaters, and the other groups of voltage stabilizer electric heaters aremarked as short-term groups of electric heaters; in the (1+M)th period, a group of voltage stabilizer electric heaters, which are not marked as long-term group electric heaters, is marked as the long-term group electric heaters in the (1+M)th period, and the other groups of voltage stabilizer electric heaters are marked as short-term group electric heaters; and when one group of voltage stabilizer electric heaters is marked as a long-term group of electric heaters once and W-1 times as a short-term group of electric heaters, the group of voltage stabilizer electric heaters is replaced. According to the operation method, the utilization rate of the voltage stabilizer electric heaters is increased, and the failure rate is reduced.

Description

technical field [0001] The invention relates to the technical field of nuclear power plant electrical maintenance, in particular to an operation method of an electric heater for a voltage stabilizer. Background technique [0002] The pressurizer is the key equipment for maintaining the pressure in the primary circuit of the nuclear power plant reactor, and stores two-phase water (water and steam) in it. During the normal operation of the nuclear power plant, the liquid phase and gas phase water are in a state of dynamic equilibrium, that is, the pressure in the pressurizer is equal to the saturated vapor pressure of water at the average coolant temperature of 310°C. The stability of the pressure inside the regulator depends on the timely and dynamic adjustment of the spray valve and the electric heater of the regulator. [0003] The regulator electric heater is usually divided into two layers, evenly distributed on the bottom of the regulator, the lower layer is about 1.5 m...

AI Technical Summary

Problems solved by technology

[0010] To sum up, the accumulative operating time of the electric heaters in the long-term group and the electric heaters in the short-term group is severely unbalanced, and the comprehensive utilization rate is low, and the electric heaters in the long-term group fail in actual operation due to the over-life operation of the electric heaters in the long-term group significantly higher rate

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