Rod position detector of nuclear reactor control rod
A rod position detector and a technology for nuclear reactors, applied in the field of nuclear power, can solve the problem that the detector cannot detect the exact position of the control rod, and achieve the effects of satisfying system redundancy requirements, simplifying the coil structure, high precision and accuracy
Active Publication Date: 2014-08-13
中广核工程有限公司 +1
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is that the connection between the coil and the coil inside the detector in the prior art often breaks or the connection is disconnected due to friction and vibration, so that the detector cannot detect the exact position of the control rod to provide a detector that can effectively avoid problems at the coil connection and accurately measure the rod position of the nuclear reactor control rod
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[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0031] figure 2 It is a schematic diagram of a nuclear reactor control rod position detector in an embodiment of the present invention. The detector in the embodiment includes a discrete coil, a comparator group and a Gray code encoder, wherein:
[0032] The discrete coils include a plurality of detection coils installed along the bushings of the nuclear reactor control rod drive rods. The input ends of the detection coils are connected in parallel and connected to an alternating current. / 6V provided by the step-down transformer. The output ends of two adjacent detection coils in the discrete c...
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The invention discloses a rod position detector of a nuclear reactor control rod. The rod position detector comprises a discrete coil, a comparer group and a gray code encoder. The discrete coil is arranged along a drive rod sleeve of the nuclear reactor control rod, output of adjacent two detection coils of the discrete coil are taken as input of a comparer, comparers are divided into five groups, and the gray code encoder converts an output signal of each group of comparers into a five-bit gray signal. According to the rod position detector of the nuclear reactor control rod, the rod position of the reactor control rod is measured by the discrete coil, thus a coil structure of the detector is simplified, the influence of serious environment of a reactor top on coils are reduced to the minimum, and the correct measurement of the detector is ensured at the same time.
Description
technical field [0001] The invention relates to the technical field of nuclear power, in particular to a nuclear reactor control rod position detector. Background technique [0002] The control rod is one of the core components of the reactor and the only movable part in the reactor. Its moving position directly affects the start-up, power operation and normal shutdown of the reactor. Accurate and reliable rod position measurement is an important guarantee for the safe operation of the reactor. Therefore, it is particularly important to have a control rod position measurement system with simple structure, accurate measurement and reliable operation to measure the position of control rods in the reactor to ensure the normal operation of the reactor. [0003] The existing rod position detector adopts the coding form of the gray code rod position sensor. Each bundle of control rods has a set of rod position detectors, and there are 61 sets of rod position detectors in 61 bundle...
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IPC IPC(8): G21C17/00G21C17/10
CPCY02E30/30
Inventor 雷晴张瑜陈杰陈冬雷刘东波张龙强
Owner 中广核工程有限公司