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Nuclear power station containment spray system starting method and device

A nuclear power plant containment and containment spray technology, applied in the field of nuclear power, can solve the problems of inability to deal with the common cause failure of containment pressure instruments or related instrumentation and control systems, and achieve the effect of ensuring integrity and limiting release

Active Publication Date: 2018-03-30
中广核工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a start-up method and device for the containment spray system of a nuclear power plant, aiming at solving the limitations of the prior art that completely relies on the pressure signal inside the containment to start the containment spray system, which cannot deal with safety issues. Consequences of common cause failure of shell pressure instruments or related I&C systems

Method used

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  • Nuclear power station containment spray system starting method and device
  • Nuclear power station containment spray system starting method and device
  • Nuclear power station containment spray system starting method and device

Examples

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Embodiment 1

[0059] figure 1 It is a flow chart of a method for starting a containment sprinkler system of a nuclear power plant provided in Embodiment 1 of the present invention, figure 1 The exemplary monitoring method may specifically include steps S101 to S106, which are described in detail as follows:

[0060] S101. Collect a containment dose rate signal in a measurement channel.

[0061] Specifically, the containment dose rate signal is collected by the containment dose rate instrument in the measurement channel.

[0062] Further, a preset number of redundant measurement channels may be preset.

[0063] S102. Validate the containment dose rate signal.

[0064] Specifically, a validity check is performed on the containment dose rate signal collected in step S101 to check the electrical validity of the containment dose rate signal. If the containment dose rate signal is within the effective measurement range, it is confirmed that the validity verification is passed; if the containm...

Embodiment 2

[0081] image 3 It is a flowchart of a start-up method for a containment spray system of a nuclear power plant provided in Embodiment 2 of the present invention, image 3 The exemplary monitoring method may specifically include steps S201 to S210, which are described in detail as follows:

[0082] S201. Calculate an evolution curve of the dose rate changing with the shutdown time according to the preset source item data.

[0083] Specifically, the preset source item data can be the source item data that can represent a typical primary circuit large breach accident, as the input data for calculating the dose rate level in the containment after the accident, and according to the input data, it is assumed that the radioactive The reactor releases all instantaneously at all times, and considering the deposition effect of radioactive products in the containment over time and the influence of other factors, the evolution curve of the dose rate with the shutdown time is calculated. ...

Embodiment 3

[0129] Figure 6 It is a structural schematic diagram of a start-up device for a containment sprinkler system of a nuclear power plant provided by Embodiment 3 of the present invention. For convenience of description, only the parts related to the embodiment of the present invention are shown. Figure 6 An exemplary device for starting the containment sprinkler system of a nuclear power plant may be the subject of execution of the method for starting the containment sprinkler system of a nuclear power plant provided in Embodiment 1 above. Figure 6 An exemplary start-up device for the containment spray system of a nuclear power plant may include an acquisition module 31, a verification module 32, an acquisition module 33, an analysis module 34, a judgment module 35 and a start-up module 36, and the details are as follows:

[0130] The collection module 31 is used to collect the containment dose rate signal in the measurement channel;

[0131] A verification module 32, configu...

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Abstract

The invention belongs to the technical field of nuclear power, and provides a nuclear power station containment spray system starting method and device. The nuclear power station containment spray system starting method comprises the steps that a containment dose rate signal is acquired in a measurement channel; the shutdown time and the corresponding dose rate of the containment dose rate signalare acquired; threshold comparison is performed on the safe dose rate range corresponding to the dose rate and the shutdown time according to a dose rate time curve; and whether a containment spray system requires to be started is determined according to the result of threshold comparison. Compared with the methods and the devices in the prior art, the dose rate in the containment acts as the judgment basis for starting the containment spray system so that the containment spray system is ensured to be started in time after occurrence of the accident even the containment pressure gauge or the relevant instrument control system has common cause failure, the integrity of the containment can be ensured and releasing of the fission product to the environment can be limited.

Description

technical field [0001] The invention belongs to the technical field of nuclear power, and more specifically, the invention relates to a method and a device for starting a containment spray system of a nuclear power plant. Background technique [0002] The containment of PWR nuclear power plant is the last safety barrier to prevent the fission products from the fuel and the primary loop radioactive materials from entering the environment, which can effectively limit the release of radioactive products to the environment. In the event of a breach accident in the primary circuit, i.e. a primary circuit coolant loss accident and a water loss accident, as the highly radioactive primary circuit coolant releases mass and energy into the containment, the temperature and pressure inside the containment will rise rapidly. The containment spray system (ContainmentSpray System, CSS) designed by the pressurized water reactor nuclear power plant sprays supercooled water from the top of th...

Claims

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Application Information

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IPC IPC(8): G21D3/06
CPCG21D3/06Y02E30/00
Inventor 王振营吕炜枫李闰生刘兆欢刘琉
Owner 中广核工程有限公司
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