Nuclear power plant control rod position measuring system and method

Abstract

The invention discloses a nuclear power plant control rod position measuring system, comprising a rod position detector, a data collection cabinet and a rod position logic cabinet; the rod position detector comprises a detector sleeve, self-induction coils and an electric connector; the self-induction coils are disposed on the detector sleeve in a disperse manner and are connected with the electric connector, and the electric connector is connected with the data collection cabinet through a group of detector cables to transmit detection voltage signals to the data collection cabinet; the data collection cabinet and the rod position logic cabinet determine the rod position of the control rod according to the detection voltage signals. The invention also discloses a nuclear power plant control rod position measuring method. According to the control rod position measuring system and method, control rod position measuring technology based on inductance self-induction displacement measuring sensor is used, the total quantity of detector coils is creased, heat radiation of the detection coils is effectively improved, and the problem that rod position detection function of the whole rod position detector is lost due to the damage of detector coil connection welding spots is solved.

Description

technical field [0001] The invention relates to the technical field of nuclear power, in particular to a control rod position measuring system and a measuring method of a nuclear power plant. 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. During the start-up and power operation of the nuclear power plant, it will be helpful to use the rod position detector to detect the position of each bundle of control rods when it is inserted or lifted in the reactor core, and provide the operator with the position information of all control rods in the reactor core. for the normal operation of the reactor. [0003] Most control rod position measurement techniques used in published reactors are based on angular, ultrasonic, eddy current or inductive measurement sensor technology. The angle-type contro...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a reliable nuclear power plant control rod position measurement system and measurement method to reduce the total number of detector coils and solve the problem of detecting the rod position of the entire rod position detector due to damage to the solder joints connected to the detector coils. loss of function problem

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