High-temperature gas cooled reactor steam generator small-flow cooling system and control method

A technology for steam generators and high-temperature gas-cooled reactors, which is applied to the primary side of steam generators, cooling devices, and greenhouse gas reduction. It can solve the problems of cold shock and long time of steam generators, and achieve both efficiency and economical efficiency. Effect

Active Publication Date: 2021-03-02
HUANENG SHANDONG SHIDAOBAY NUCLEAR POWER CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] The cooling of the prior art, or the method of natural cooling, which takes a long time, and it takes about 20 days to cool down to the start-up condition; or the method of rapid cooling, which may cause damage to the steam generator due to the rapid temperature drop. cold shock

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  • High-temperature gas cooled reactor steam generator small-flow cooling system and control method

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Embodiment Construction

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0032] The present invention mainly lies in that an auxiliary boiler room is set to generate auxiliary steam, the heat exchange tube of the steam generator is cooled through the main water supply pipe, and a small bypass pipe is arranged on the main steam pipe, which is discharged into a pool after being enlarged and reduced in temperature; Temperature measuring points are set at the inlet and outlet of the heat exchange tube, and high-precision regulating valves and flowmeters are set on the bypass small tubes, an...

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Abstract

The invention relates to a high-temperature gas cooled reactor steam generator small-flow cooling system and a control method thereof, the cooling system comprises a main water feeding pump, a main water feeding isolation valve, and an auxiliary boiler room arranged in an auxiliary electric boiler between the main water feeding pump and the main water feeding isolation valve to generate auxiliarysteam, a steam generator heat exchange pipe is cooled through a main water feeding pipeline, a bypass small pipe is arranged on a main steam pipeline, after capacity expansion and temperature reduction, the steam is discharged into a pool for collection; temperature measuring points are arranged at an inlet and an outlet of a heat exchange tube of the steam generator, a high-precision regulating valve and a flow meter are arranged on a small bypass tube, opening and closing of the inlet and outlet temperature measuring points, the flow meter and the regulating valve are controlled in an interlocking mode, system operation is monitored in real time, auxiliary steam flow is regulated, the cooling rate is smaller than 5 DEG C / h while the cooling speed is increased, efficiency and safety factors are considered, and the economy of a power plant is improved.

Description

technical field [0001] The invention relates to equipment heat transfer, in particular to a small-flow cooling system of a steam generator after emergency shutdown of a high-temperature gas-cooled reactor and a control method thereof. Background technique [0002] As one of the fourth-generation nuclear power units, the high-temperature gas-cooled reactor nuclear power unit has the characteristics of high power generation efficiency, good inherent safety, and simple system, and has a good application prospect. During normal operation, the temperature at the hot end of the primary side of the steam generator is 750°C, and the temperature at the cold end is 243°C; the temperature of the feed water at the secondary side is 205°C, and the temperature of the steam is 571°C. When the unit is shut down in an emergency and the fault is eliminated, the primary side equipment (steam generator, etc.) and the medium must be cooled to 205°C as soon as possible to meet the conditions for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C15/18G21C17/032G21D1/00
CPCG21C15/18G21C17/032G21D1/006Y02E30/30
Inventor 王传振席京彬蒋顺军李长峰王宏国雷伟俊耿宝杰安娜
Owner HUANENG SHANDONG SHIDAOBAY NUCLEAR POWER CO LTD
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