Nuclear island cooling system for double reactor units and cooling method thereof

Abstract

The invention relates to a nuclear island cooling system for double reactor units. The nuclear island cooling system of each reactor unit comprises RRI security series, backup RRI security series, an SEC sub-system performing heat exchange with the RRI security series, and a backup SEC sub-system which is only started when the outlet temperature at the RRI side of a heat exchanger is more than 35 DEG C. The nuclear island cooling system for the double reactor units also comprises a first temperature measuring meter which is used for detecting fluid temperature at the outlet of the RRI side of the heat exchanger. The invention also provides a cooling method for the nuclear island cooling system for the double reactor units, when the temperature of the outlet at the RRI side of the heat exchanger is more than 35 DEG C, the backup SEC sub-system is started. The water temperature of the outlet at the RRI side of the heat exchanger is detected by the first temperature measuring meter, if the water temperature of the outlet of the heat exchanger is more than 35 DEG C, the backup SEC sub-system is started, so that the problem of insufficient cooling capability of the cold chain system of the double reactor units can be solved.

Description

technical field [0001] The invention relates to the field of nuclear engineering, in particular to a nuclear island cooling system of a double reactor unit and a cooling method thereof. Background technique [0002] During the construction of the nuclear island system of a nuclear power plant, the nuclear island cooling system is designed in conjunction with the nuclear reactor. The main purpose is to discharge the waste heat of the reactor unit to achieve the purpose of cooling. In the existing design, the final heat sink temperature of the dual-reactor unit is too high, resulting in insufficient cooling capacity of the nuclear island cooling system. The traditional solution is to update the hardware equipment of the nuclear island cooling system and improve the performance indicators of the hardware equipment of the nuclear island cooling system to meet the cooling needs. However, in reality, the performance index of the hardware equipment of the nuclear island cooling sy...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a nuclear island cooling system for dual-reactor units in view of the defects of the dual-reactor unit’s final heat sink temperature that is too high and the cooling capacity of the nuclear island cooling system that exists in the nuclear island system of the nuclear power plant in the prior art. The system and its cooling method can well solve the problem of excessive temperature of the heat sink of the reactor unit

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