Cold test mis-centering device for reactor control rod drive wire of nuclear power plant

Abstract

The invention discloses a cold test mis-centering device for a reactor control rod drive wire of a nuclear power plant. The cold test mis-centering device comprises a supporting ring and an adjustment piece, wherein the supporting ring is fixedly arranged on a test body, wherein an eccentric hole is formed in the supporting ring; the center axis of the eccentric hole shifts from the center axis of the supporting ring for a first eccentricity; the adjustment piece is cascaded on the supporting ring and is connected with a control rod drive mechanism; a center hole corresponding to the eccentric hole is formed in the adjustment piece; the eccentric hole and the center hole are used for jointly containing the control rod drive mechanism; the center axis of the control rod drive mechanism shifts from the center axis of the center hole for a second eccentricity; the adjustment piece can rotate or slide relative to the supporting ring to adjust the mis-centering value of the center axis of the control rod drive mechanism relative to the center axis of the supporting ring. The cold test mis-centering device for the reactor control rod drive wire of the nuclear power plant can precisely adjust the mis-centering value of the center axis of a control rod guide barrel relative to the center axis of the supporting ring through motion of the adjustment piece relative to the supporting ring.

Description

technical field [0001] The invention belongs to the technical field of nuclear power, and more specifically relates to a misalignment device for a nuclear power plant reactor control rod drive line in a cold test. Background technique [0002] The reactor control rod driving line is an important guarantee for the safe operation of the nuclear power plant. When the reactor is running, the driving mechanism arranged on the upper part of the pressure vessel drives the control rod assembly to move up and down in the core to control the rapid change of the reactivity of the core and realize the start of the reactor. , power regulation, normal shutdown and emergency shutdown under accident conditions. The reliability of the reactor control rod drive line is directly related to the operational safety of the reactor. [0003] Theoretically, all parts of the drive line can be accurately centered, but this is not the case in reality, because: the dimensions of the parts cannot be abs...

AI Technical Summary

Problems solved by technology

However, the existing misalignment device for the control rod drive line of the nuclear power plant reactor has the following defects: the rope pulling amount cannot be accurately measured, and the test error is large; after pulling, the upper part of the control rod drive mechanism is stressed, and the rope is flexible. The driving mechanism is easy to vibrate during the test, which affects the life of the equipment; after pulling, the control rod driving mechanism will deflect a small angle as a whole, and the upper driving line cannot be plumb, which affects the test results

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