Dual deaerator multi-mode operation feedwater system for high temperature reactor and control method thereof

By employing a dual deaerator and multi-mode operation of the feedwater system, including parallel and series operation modes, the complexity and heating stability issues of the feedwater system in high-temperature gas-cooled reactor nuclear power units have been resolved, achieving efficient feedwater temperature control and system flexibility.

CN116221707BActive Publication Date: 2026-05-29STATE NUCLEAR ELECTRIC POWER PLANNING DESIGN & RES INST CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
STATE NUCLEAR ELECTRIC POWER PLANNING DESIGN & RES INST CO LTD
Filing Date
2022-11-28
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

The existing feedwater system of high-temperature gas-cooled reactor nuclear power units has a complex structure and high operating costs, making it unsuitable for large-capacity high-temperature gas-cooled reactor nuclear power units of 600MW and above. Furthermore, the deaerator cannot be shut down for maintenance during long-term operation, affecting the stability of the heating load.

Method used

The feedwater system employs a dual deaerator multi-mode operation, including a first deaerator and a second deaerator. Through parallel and series operation modes, combined with isolation valves and regulating valves, it achieves cascade heating of the feedwater and system switching, ensuring that the feedwater temperature meets the requirements of the nuclear island.

Benefits of technology

It has achieved safety and heating stability for large-capacity high-temperature gas-cooled reactor nuclear power units of 600MW and above, reduced system complexity and operating costs, and ensured the stable operation of deaerators in fault or maintenance conditions.

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Abstract

The application discloses a dual-deaerator multi-mode operation feedwater system for a high-temperature reactor and a control method thereof, and belongs to the technical field of nuclear power, wherein the feedwater system comprises a first deaerator, a second deaerator, a feedwater pump, a recirculation pump, an auxiliary steam header, a first steam source branch, a second steam source branch, a third steam source branch and a fourth steam source branch, a first feedwater branch, a second feedwater branch, a first circulating water outlet branch, a second circulating water outlet branch, a first circulating water inlet branch and a second circulating water inlet branch. The application can be used in the feedwater system configuration of a 600MW and above large-capacity high-temperature gas cooled reactor nuclear power unit, greatly guarantees the safety of a nuclear island, and guarantees the safety of the operation of a main feedwater pump; the application solves the stability of external heat supply unit equipment failure and unit maintenance of a high-temperature gas cooled reactor nuclear power, and has great practical significance for the development of the high-temperature gas cooled reactor in the nuclear energy comprehensive field.
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