Start-stop auxiliary device used in integral reactor and cold starting method of integral reactor

Abstract

The invention provides a start-stop auxiliary device used in an integral reactor and a cold starting method of the integral reactor. An inlet of a starting separator is connected with an outlet conduit of a once-through steam generator, an outlet of the starting separator is connected with a main steam pipe through a steam valve, and a drain outlet is connected with a water storage tank. An outlet at the bottom of the water storage tank is connected with a circulating water pump, and one conduit at the outlet of the water storage tank is connected with a condenser through an outlet stop valve of the water storage tank, a water storage tank water level control valve and a thermoreduction and dropping device. The circulating water pump is connected with a water supply conduit at the inlet of the once-through steam generator through a circulating water-carrying control valve. A water feed pump is connected with the condenser, the water feed pump is further connected with the inlet conduit of the once-through steam generator through a main water feed valve and with the water storage tank through a cold water valve. The start-stop auxiliary device is capable of increasing the temperature and pressure of refrigerant in a first circuit when the reactor starts, starting pressure and starting flow of a second circuit are established effectively, phenomenon of unstable flow is avoided, working media and heat energy are recycled effectively, and starting time is shortened.

Description

technical field [0001] The invention relates to a start-stop auxiliary device for an integrated reactor. The invention also relates to a cold start method of an integrated reactor using the start-stop auxiliary device of the integrated reactor. Background technique [0002] Due to space requirements, integrated nuclear reactors tend to use compact and efficient once-through steam generators. The secondary circuit working fluid is forced to flow through the heating surface, heated by the primary circuit coolant, and after preheating, evaporation, and superheating, superheated steam is generated and sent to the steam turbine system to do work. The once-through steam generator has the characteristics of simple structure, good maneuverability and low heat consumption rate, and is especially suitable for marine nuclear power plants that require frequent variable load operation. The once-through steam generator is composed of hundreds of parallel channels, and the hydrodynamic c...

AI Technical Summary

Problems solved by technology

During normal operation, the feed water of the once-through steam generator is supercooled water from the condenser. During the cold start of the reactor, the continuous supercooled feed water will take away a lot of heat. The work cannot complete the heating and boosting process of the primary loop system

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