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A nuclear power plant subcriticality direct measurement system, hardware platform and measurement method

A subcriticality and measurement system technology, applied in nuclear power generation, nuclear engineering, nuclear reactor monitoring, etc., can solve the problem of large model uncertainty, high cost of technical implementation and transformation, and difficulty in meeting the actual application requirements of commercial pressurized water reactor nuclear power plants and other issues to achieve the effect of improving safety and economy and shortening the mainline time

Active Publication Date: 2022-05-10
SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, most technologies are carried out based on research reactor systems, without fully considering the characteristics of the start-up conditions of commercial PWR nuclear power plants. The cost of technology implementation and transformation is high, and it is difficult to meet the practical application of commercial PWR nuclear power plants. need
On the other hand, the model uncertainty of many criticality measurement technology methods is large, and a large conservative margin must be left to meet regulatory requirements

Method used

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  • A nuclear power plant subcriticality direct measurement system, hardware platform and measurement method
  • A nuclear power plant subcriticality direct measurement system, hardware platform and measurement method
  • A nuclear power plant subcriticality direct measurement system, hardware platform and measurement method

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Embodiment 1

[0038] In order to understand the present invention more clearly, the measurement of shutdown margin, control rod value and isothermal temperature coefficient of a 1400MWe class nuclear power plant pressurized water reactor core is described below as an example.

[0039] Such as image 3 The reactor core shown is loaded with 193 cartridges of fuel assemblies 1 . 89 bundles of control rods 2 are arranged in the reactor, which are used for controlling reactivity and power distribution during reactor operation, and realizing rapid shutdown.

[0040] For the above cores, the shutdown margin, control rod value and isothermal temperature coefficient are measured under subcritical conditions, and the implementation method is as follows:

[0041] 1) Shutdown margin measurement:

[0042] a) The reactor is in the subcritical condition to be tested;

[0043] b) The data collection module collects the measurement data of the working conditions to be tested as input, including soluble b...

Embodiment 2

[0070] Another embodiment of the present invention is the measurement of the critical boron concentration and boron differential value of a 1000MWe level nuclear power plant pressurized water reactor core. The reactor core is loaded with 157 cartridges of fuel assemblies.

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Abstract

The invention provides a nuclear power plant subcriticality direct measurement system, a hardware platform and a measurement method. The system includes a reactor measurement data collection module, a measurement noise processing module, a measurement conversion calculation module, and a reactor core subcriticality parameter calculation module. The measurement system adopts the "plug and play" design concept, does not need to modify the hardware and software system of the nuclear power plant, does not occupy the main line time of the reactor start-up phase, and can effectively improve the safety and economy of the nuclear power plant in the subcritical phase.

Description

technical field [0001] The invention belongs to the field of direct measurement of nuclear power plants, in particular to the field of direct measurement of the subcriticality of pressurized water reactor nuclear power plants. Background technique [0002] The pressurized water reactor nuclear power plant is in a subcritical state for a long time during the shutdown and start-up stages. Continuous monitoring of the subcriticality of subcritical reactors is a key means to ensure safe and efficient operation of the reactor. Some subcritical degree measurement technologies have been developed in succession in the world. On the one hand, most technologies are carried out based on research reactor systems, without fully considering the characteristics of the start-up conditions of commercial PWR nuclear power plants. The cost of technology implementation and transformation is high, and it is difficult to meet the practical application of commercial PWR nuclear power plants. nee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C17/06G21C17/10G21C17/112G21C17/14
CPCG21C17/14G21C17/06G21C17/10G21C17/112Y02E30/30
Inventor 张宏博汤春桃毕光文杨庆湘杨伟焱杨波秦玉龙
Owner SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD