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Control system and control method for preventing overpressure of main steam pipeline of nuclear power plant

A main steam and nuclear power plant technology, applied in the field of nuclear safety, can solve the problems of overpressure in the main steam pipeline and the inability of steam to be completely removed in time, and achieve the effects of ensuring discharge time, preventing overpressure and ensuring safe shutdown.

Active Publication Date: 2017-12-12
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 present invention aims at the problem in the prior art that the steam generated by the steam generator cannot be completely discharged in time, leading to the overpressure of the main steam pipeline, and provides a control system and control method that can effectively prevent the overpressure of the main steam pipeline of the nuclear power plant

Method used

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  • Control system and control method for preventing overpressure of main steam pipeline of nuclear power plant
  • Control system and control method for preventing overpressure of main steam pipeline of nuclear power plant
  • Control system and control method for preventing overpressure of main steam pipeline of nuclear power plant

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Embodiment 1

[0049] An embodiment of the present invention provides a control system for preventing overpressure of the main steam pipeline of a nuclear power plant, see figure 1 , the system consists of:

[0050] Condenser 100, the condenser 100 is connected to the pipeline where the bypass valve 300 is located, and the condenser 100 is used to condense the high-temperature steam discharged from the bypass valve;

[0051] Bypass valve 300, which is installed on the pipeline where the main steam pipeline is connected to the condenser 100;

[0052] The condenser pressure detection unit 400 is installed on the condenser 100 to obtain the actual pressure signal in the condenser 100; the condenser pressure detection unit is a pressure sensor, and the pressure sensor can be selected as ROSEMOUNT3051.

[0053] The controller 600 is electrically connected to the condenser pressure detection unit 100, the steam turbine 400, the reactor 200 and the bypass valve 300 respectively, and the controller...

Embodiment 2

[0115] An embodiment of the present invention provides a control method for preventing overpressure of the main steam pipeline of a nuclear power plant, see Image 6 , the method includes:

[0116] Step S100, acquiring the actual pressure signal in the condenser 100 through the condenser pressure detection unit 500 installed on the condenser 100;

[0117] Step S200, the controller judges whether the detected actual pressure signal satisfies the first preset condition and the second preset condition; the first preset condition in the figure is that the fixed value of the condenser pressure is greater than or equal to 26kPa.a as an early intervention Value, the intervention value is defined as the condenser fault signal, when the condenser pressure value reaches 26kPa.a, the condenser fault signal is triggered, sent to the nuclear island to protect the stack and open the bypass discharge; the second preset condition is The pressure signal of the condenser is not available, and ...

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Abstract

The invention discloses a control system and control method for preventing overpressure of a main steam pipe of a nuclear power station, and belongs to the technical field of nuclear safety. The system comprises a condenser, a reactor, a steam turbine, a bypass valve installed on a pipe connecting the main steam pipe and the condenser, a detection unit connected with the condenser for measuring the pressure value of the condenser, and a controller which is in communication connection with the detection unit and sends nuclear island tripping signals to the reactor and valve on / off signals to the bypass valve according to the pressure value of the condenser. A 'condenser fault' signal is employed for controlling and protecting the steam turbine and the reactor. The bypass discharging valve is started to realize the purpose of intervening set state in advance, so that the main steam discharging time after tripping is ensured, and overpressure of the main steam pipe can be effectively prevented.

Description

technical field [0001] The invention relates to the technical field of nuclear safety, in particular to an anti-overpressure control protection for a main steam pipeline of a nuclear power plant, and more specifically, provides a control system and a control method for preventing overpressure of the main steam pipeline of a nuclear power plant. Background technique [0002] According to the technical characteristics of the CRP1000 pressurized water reactor nuclear power plant, part of the waste heat of the reactor after the nuclear island jump needs to be converted into steam by the steam generator to ensure the safe shutdown of the reactor. [0003] Since the steam turbine has already tripped when the nuclear island jumped, the large amount of steam generated by the steam generator cannot enter the steam turbine, and can only be discharged to the condenser through the bypass discharge system of the steam turbine; the condenser is the final hot well in the secondary circuit o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21D3/06
CPCG21D3/06Y02E30/00
Inventor 苏鸿姜成仁范逸致丁佳鹏刘星陈齐平罗重奎彭磊
Owner 中广核工程有限公司
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