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Nuclear power station thermal power measurement drift monitoring method

A technology for thermal power and nuclear power plants, applied in the field of detection, can solve problems such as increasing negative system errors, and achieve the effect of ensuring safe operation and avoiding adverse consequences

Active Publication Date: 2014-05-21
CHINA GENERAL NUCLEAR POWER CORP +2
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  • Description
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AI Technical Summary

Problems solved by technology

The minimum cross-sectional area of ​​the flow stream at the outlet of the orifice plate has increased after the entrance has been eroded. If it can be calibrated under this condition, it will be found that the outflow coefficient of the orifice plate has increased, but it is still calculated according to the standard formula in use. Smaller coefficients of , there will be increasingly negative systematic errors

Method used

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  • Nuclear power station thermal power measurement drift monitoring method
  • Nuclear power station thermal power measurement drift monitoring method
  • Nuclear power station thermal power measurement drift monitoring method

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Embodiment 1

[0039] When a nuclear power plant reactor is running at power, its core power is based on the heat balance calculation value. The principle is to calculate the reactor core power through the principle of energy balance of the second loop. Under the condition of rated power operation, if the error analysis can be correctly analyzed, the thermal power of the reactor can be guaranteed to run safely and at full capacity. At the same time, the fluctuation of parameters can also be found, and whether there is parameter measurement drift can be diagnosed in time.

[0040] Determination of Reactor Thermal Power and Error Determination

[0041] The formula for calculating the thermal power of a reactor is:

[0042] WR = Σ i = 1 3 [ ( Hvi - Hei ) Qei - ( ...

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Abstract

The invention discloses a nuclear power station thermal power measurement drift monitoring method which includes the following steps: monitoring a turbine first-class front pressure variation dQ steam engine and comparing the turbine first-class front pressure variation dQ steam engine to an initial value Q steam engine in fuel circulation; monitoring differential pressure variation dQ water feeding of water feeding flow and comparing the differential pressure variation dQ water feeding to the feeding quality Q water feeding; monitoring the change condition of a function E according to a function (that img file='DDA00002404494200011. TIF' wi= '423' he='134' / ); determining that measurement drift happens when the function E exceeds a preset value. By means of the method, the nuclear power station thermal power measurement drift can be monitored online in real time, the drift condition is displayed visually, prevention measures can be taken according to the drift condition, adverse effects caused by the measurement drift are avoided, and safety operation of a nuclear power station is ensured.

Description

【Technical field】 [0001] The invention relates to detection technology, in particular to a detection technology suitable for measuring drift of thermal power in nuclear power plants. 【Background technique】 [0002] In the nuclear power plants operating in the United States, France, China and other countries, with the extension of operation time, the thermal power of the nuclear island may be overestimated or underestimated from time to time. The occurrence of such events reduces the safety margin of nuclear power plant operation. If it is not paid attention to and solved, with the continuous drift of thermal power measurement, the measurement results will show continuous vibration and expansion, and even lead to the collapse of the control system, resulting in immeasurable safety accidents. [0003] The main feed water flow control of the nuclear power unit is an important parameter affecting the water level adjustment of the steam generator, which directly affects the safe ...

Claims

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Application Information

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IPC IPC(8): G01K17/00G21C17/00
CPCY02E30/30
Inventor 张大勇夏明池志远柴伟东
Owner CHINA GENERAL NUCLEAR POWER CORP
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