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Safety injection system

A safety injection and safety injection pump technology, which is applied in the field of improving the structure of the safety injection system of nuclear power plants, can solve the problems of insufficient accident handling capacity of the safety injection system, and achieve the goals of enhancing the mitigation ability of severe accidents, simplifying the system composition, and simplifying the operation Effect

Active Publication Date: 2010-09-29
中广核工程有限公司 +1
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  • Abstract
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Problems solved by technology

[0010] In addition, the existing safety injection system is insufficient in dealing with severe accidents, which will become an important factor restricting its market competitiveness

Method used

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Embodiment Construction

[0028] The preferred embodiments of the present invention will be described in detail below with reference to the drawings.

[0029] The structural diagram of the safety injection system of the nuclear power plant in the embodiment of the present invention is as follows: image 3 As shown, compared with the original system, the improved safety injection system still adopts the safety injection method under three pressure levels of high, medium and low, but the composition of the system is greatly simplified. The improved safety injection system mainly includes a high-pressure safety injection pump, a low-pressure safety injection pump 206, a safety injection tank, and a refueling water tank 207 for accommodating safety injection water. Among them, the high-pressure safety injection pump can be connected to the refueling water tank 207 and the direct pressure vessel injection pipeline through a pipeline provided with a control valve, such as image 3 shown. The low-pressure s...

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Abstract

The invention relates to a safety injection system, which is used for mitigating an accident and protecting the safety of a reactor core of a nuclear power plant and comprises a high-pressure safety injection pump, a low-pressure safety injection pump, a safety injection tank and a refueling water tank for containing safety injection water, wherein the refueling water tank is positioned in a safety shell of the nuclear power plant; the safety injection tank is connected on a direct pressure vessel injection pipeline by a pipeline provided with a control valve; the high-pressure safety injection pump is connected between the refueling water tank and the direct pressure vessel injection pipeline by a pipeline provided with a control valve; and the low-pressure safety injection pump is connected between the refueling water tank and the direct pressure vessel injection pipeline by a pipeline provided with a control valve. The safety injection system has the advantages of reducing cross pipelines of the system, realizing continuous operation, simplifying the system operation, also strengthening mitigating capability of the system for the serious accident and improving safety of the nuclear power plant.

Description

technical field [0001] The invention relates to the improvement of the safety injection system structure of a nuclear power plant. Background technique [0002] The safety injection system is also called the emergency core cooling system. Its main function is: when the primary circuit system of nuclear power equipment breaks and causes a loss of water accident, the safety injection system injects water into the core to ensure submersion and cooling of the core, prevent the core from melting, and maintain The integrity of the core; when the main steam pipe ruptures, the reactor coolant shrinks due to excessive cooling, the water level of the pressurizer drops, and the safety injection system injects high-concentration boron-containing water into the primary circuit to re-establish the water level of the pressurizer. Shut down the reactor quickly and prevent the reactor from returning to criticality due to supercooling. [0003] In order to realize the above functions, the sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C15/18
CPCY02E30/40Y02E30/30
Inventor 张恒明
Owner 中广核工程有限公司
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