METHOD AND DEVICE FOR CONTINUOUS MONITORING OF PROCESS CHANNEL PIPE BEND Russian patent published in 2015 - IPC G21C17/17 

FIELD: measurement equipment.

SUBSTANCE: method and device are designed to one-off inspection and continuous monitoring of bend in pipes 1 of process channels in nuclear plants. The device comprises a flexible metering rod 2. The rod 2 comprises sections 3 serially connected by couplings 4. The end of the section 3 is made from current-conducting material. An indicator 5 comprises a part of the section 3 placed inside the coupled section for the length L. A sensor 6 has alternating inner resistance. Before start of monitoring the sensor 6 is set for zero elevation. The rod 2 is placed in the pipe 1. Under impact of bending of the pipe 1 the bend between sections in the joint of sections 3 changes by the angle α in azimuthal direction θ. The indicator 5 moves along the surface of the sensor 6. They record resistance of the indicator 5 and the sensor 6 in the point of contact. They determine the start and end position of the indicator 5. They determine the value of displacement Δ of the indicator 5. The bend angle is calculated according to the formula α=Δ/L. The azimuthal direction θ is determined, as well as the bend level. The reactor is started. They monitor dynamics of displacement of the indicator 5. Simultaneously they determine α, θ as well as the depth of the bending level. Increased information value of the measurement method with continuous monitoring.

EFFECT: increased universality of a device.

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