High-temperature gas-cooled reactor pressure-maintaining overhauling and sealing control system

Abstract

The invention relates to a high-temperature gas-cooled reactor pressure-maintaining overhauling and sealing control system, which comprises a main gas supply pipeline, a first redundancy gas supply pipeline, a second redundancy gas supply pipeline and a gas exhaust spare pipeline, wherein an inlet of the main gas supply pipeline is connected with a high-pressure helium tank, an outlet of the maingas supply pipeline is connected with a pressure-maintaining overhauling and sealing body; a plurality of pressure gauges, a stop valve and a pressure-maintaining gas tank are arranged on the main gas supply pipeline in sequence from the inlet to the outlet; an inlet of a basic redundancy gas supply pipeline is connected with the high-pressure helium tank, an outlet of the basic redundancy gas supply pipeline is connected with the main gas supply pipeline, and a plurality of pressure gauges and a stop valve are arranged on the basic redundancy gas supply pipeline in sequence from the inlet tothe outlet; total two redundancy gas supply pipelines are arranged and respectively are the first redundancy gas supply pipeline and the second redundancy gas supply pipeline; an inlet of the first redundancy gas supply pipeline is connected with a pressurizer, an inlet of the second redundancy gas supply pipeline is connected with the pressurizer, and the detection of the system adopts the design mode of two-in-three and different working principles. The pressure control strategy is applied to the high-temperature gas-cooled reactor pressure-maintaining overhauling and sealing control system, and the requirement of high reliability of a nuclear power system is met by redundancy configuration. The high-temperature gas-cooled reactor pressure-maintaining overhauling and sealing control system has the characteristics of high control accuracy and reliability equipment operation.

Description

technical field [0001] The invention relates to a sealing control system, in particular to a high-temperature gas-cooled reactor pressure maintenance and sealing control system. Background technique [0002] The high-temperature gas-cooled reactor is a kind of fourth-generation nuclear reactor. The core outlet temperature is as high as 850-1000 degrees Celsius, and helium is used as the coolant. The high-temperature gas-cooled reactor has the advantages of high thermal efficiency, high fuel consumption conversion ratio, and intrinsic safety. It is one of the fourth-generation advanced nuclear energy system technologies that my country focuses on developing. In the primary loop system of a high-temperature gas-cooled reactor, the fan used to drive the coolant to circulate in the system is called the main fan. The main fan is the "heart" part of the gas-cooled reactor, and it is a key component to ensure the safety of nuclear power operation and control the circulation of coo...

AI Technical Summary

Problems solved by technology

The working pressure of the gas-cooled reactor is about 60-70 times of the normal pressure. Once the pressure is released, the volume of the gas will expand to 60-70 times of the working volume. It is difficult to store such a large amount of radioactive gas.

If the pressure is released to the atmosphere, on the one hand, it will cause a large amount of expensive working gas (helium) to be lost and wasted; on the other hand, strict purification must be carried out before discharge, resulting in a significant increase in operating costs

If the pressure is released by means of pressurized storage, it will take a long time. At the same time, it is also necessary to build a gas storage device with a volume similar to that of a nuclear reactor. When restarting the gas-cooled reactor, the pressure must be gradually increased. The whole process takes a long time. Difficulty, serious economic losses caused by pressure relief maintenance

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