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Nuclear instrumentation system of nuclear power plant and its positioning method

A technology for nuclear instruments and nuclear power plants, applied in the field of nuclear power systems, can solve the problems of sudden change of detector measurement signals, large installation and maintenance space, inconvenient operation and maintenance, etc., and achieve the effects of saving resources, convenient operation and maintenance, and improving anti-electromagnetic interference performance.

Active Publication Date: 2017-04-26
中广核工程有限公司 +1
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  • Description
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AI Technical Summary

Problems solved by technology

This installation and positioning method is not only cumbersome to operate, but also has a large space for installation and maintenance, and is inconvenient for operation and maintenance.
During the test maintenance during the outage and refueling period, the staff also need to receive a lot of radioactive dose of radiation. If the detector is inspected or replaced, the radiation dose received will be even greater
In addition, since the cable connection plate is very close to the reactor core, thermal expansion and contraction may easily lead to loose connections, which may cause sudden changes or loss of detector measurement signals

Method used

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  • Nuclear instrumentation system of nuclear power plant and its positioning method
  • Nuclear instrumentation system of nuclear power plant and its positioning method
  • Nuclear instrumentation system of nuclear power plant and its positioning method

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Embodiment Construction

[0033] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0034] Such as figure 2 Shown is a schematic structural view of the nuclear instrumentation system of the nuclear power plant of the present invention.

[0035]The nuclear instrumentation system of nuclear power plant is mainly used to monitor the reactor core parameters of the pressure vessel, such as reactor power, power change rate and radial and axial distribution of power, etc. The pressure vessel is placed in the plant. The nuclear instrumentation system of the nuclear power plant includes 3 channels for obtaining monitoring signals, a protection cabinet for receiving the signals of these 3 channels for power monitoring, and the control of the monitoring and alarming of the sound counting rate and other control f...

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Abstract

A nuclear instrumentation system for monitoring reactor core parameters includes a source range channel, an intermediate range channel and a power range channel, each channel including at least one detector installed around the pressure vessel. The detectors of the power range channel and the intermediate range channel share a plurality fission chambers, thereby reducing the number of detectors requiring installation. Preferably, the intermediate and power range detectors are installed in instrumentation guiding sleeves arranged homogeneously around the reactor pressure vessel, while the source range detectors are installed in independent guiding sleeves which are staggered with respect to the intermediate and power range detectors (see Fig. 4). In addition, the invention adopts a "bucket installation", so that the installation of the detectors requires only a compact structure, facilitating operation and maintenance, and preventing work staff from suffering high irradiation.

Description

technical field [0001] The invention relates to the field of nuclear power systems, in particular to a nuclear instrument system of a nuclear power plant and a positioning method thereof. Background technique [0002] The nuclear instrumentation system, also known as the RPN system, uses a series of detectors distributed outside the reactor pressure vessel to measure reactor power, power change rate, and radial and axial distribution of power. The currently known RPN system includes 2 source range detectors, 2 intermediate range detectors, and 4 power range detectors. Among them, the middle range detector is composed of several compensation ionization chambers, and the power range detector is composed of 6 long ionization chambers. Due to the use of compensation ionization chambers, long ionization chambers, the anti-gamma radiation capabilities of the middle range detectors and power range detectors , Anti-noise performance and anti-electromagnetic interference performance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C17/108G21C19/20
CPCG21C17/108G21C19/20G21C19/02Y02E30/30
Inventor 李天友曾力张睿杨浩王星田亚杰史觊汪伟彭华清陈卫华黄伟军江辉
Owner 中广核工程有限公司
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