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System for monitoring concentration of hydrogen in containment vessel

A concentration monitoring and containment technology, which is applied in the field of hydrogen concentration monitoring systems in containment, can solve the problems such as the inability to realize the monitoring function and the inability to realize on-line continuous monitoring, and achieve the effect of preventing clogging

Inactive Publication Date: 2012-01-18
中广核工程有限公司 +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] The sensor is installed outside the containment and needs to be monitored through a sampling system. However, the existing CPR1000 monitors the hydrogen concentration by taking samples from the ETY (containment atmosphere monitoring system) pipeline, which cannot achieve continuous online monitoring.
Although the existing technology has been based on the original ETY hydrogen measurement, the branch pipe is drawn from the ETY pipeline, and the sample gas is sent to the gas analyzer for measurement, so as to realize the online continuous monitoring under the design basis accident; In some cases, because the ETY pipeline is isolated, the sampling is forced to stop, and the monitoring function is still unable to be realized

Method used

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  • System for monitoring concentration of hydrogen in containment vessel
  • System for monitoring concentration of hydrogen in containment vessel

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Embodiment Construction

[0021] see figure 1 , the hydrogen concentration monitoring system in the containment of the present invention includes a sampling head 10, a sampling pipeline 12, a vacuum pump 14, a gas analyzer 16, RAZ (nitrogen distribution system, providing nitrogen purge), a nitrogen cylinder 18, a buffer tank 20 and a gas return pipeline twenty two.

[0022] There are multiple sampling heads 10, which are respectively arranged at different positions in the containment vessel 30, so as to realize multi-point sampling and measurement. The sampling head 10 is provided with a filter to prevent the aerosol or suspended matter of large particles in the gas in the containment vessel 30 from entering after an accident and blocking the sampling pipeline 12 connected to the sampling head 10 . The sampling pipeline 12 is a capillary stainless steel tube with an outer diameter of 4-6mm and an inner diameter of at least 0.5mm. All the sampling pipelines 12 are collected into one after passing thr...

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Abstract

The invention discloses a system for monitoring the concentration of hydrogen in a containment vessel. The system comprises a sampling head arranged in the containment vessel, a sampling pipeline connected with the sampling head, and a gas analyzer connected with the sampling pipeline penetrating out of the containment vessel, wherein the sampling pipeline is a capillary stainless steel pipe, and a filter for preventing large-particle aerosol or suspended matters form entering the sampling pipeline is arranged on the sampling head. A containment vessel external-sampling monitoring mode is adopted in the system for monitoring the concentration of the hydrogen in the containment vessel, the problem of isolation of the containment vessel of the traditional sampling and monitoring system under serious accidents is effectively solved by adopting the capillary stainless steel pipe, and the capillary stainless steel pipe is prevented from being blocked through arranging the filter on the sampling head.

Description

technical field [0001] The invention relates to the field of nuclear power safety, in particular to a hydrogen concentration monitoring system in a containment vessel. Background technique [0002] After the accident, online continuous monitoring of hydrogen concentration in the containment is one of the common problems that are difficult to solve in domestic second-generation pressurized water reactor nuclear power plants. For the monitoring of functions, the National Nuclear Safety Administration has also put forward requirements for the continuous monitoring of the hydrogen concentration in the containment under severe accidents. Especially after the Fukushima accident, the problem of hydrogen explosion has attracted more attention. [0003] At present, there are mainly two technical solutions for monitoring the hydrogen concentration in the containment after the accident at home and abroad, namely, installing the sensor inside the containment and sampling and monitorin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/20G01N1/10
Inventor 周绍飞唐辉王争光冯兴祥高清
Owner 中广核工程有限公司
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