Reactor core nuclear measuring plug inner pin removal tool and removal method

Abstract

The invention belongs to the technical field of nuclear power station reactor core parameter measurement, and particularly relates to a reactor core nuclear measuring plug inner pin removal tool and aremoval method. The reactor core nuclear measuring plug inner pin removal tool of the invention comprises a push pin support member, a push pin guide tube, a push pin, a push pin support base and a push pin anti-drop clamping member, and can be used when the reactor core nuclear measuring plug inner pin is subjected to preventive and corrective maintenance; the pin removal process is quite convenient, and the pin itself and the mounting jacks are not damaged.

Description

technical field [0001] The invention belongs to the technical field of nuclear power plant reactor core parameter measurement, and in particular relates to a tool and a method for removing a pin in a core nuclear test plug. Background technique [0002] The core measurement neutron flux signal, thermal resistance temperature measurement signal, thermocouple temperature measurement signal and main pump working parameter signal of Tianwan Nuclear Power Station are collected at the side plug of the lower protection cabinet, and then sent to the corresponding processing module in the cabinet for signal processing. Receive, process and display. [0003] According to statistics, the number of lower protection cabinets is 4, the number of information processing cabinets is 2, and the number of plugs in each cabinet is 41. The number of pins in each plug ranges from 8 to 36 pins, with an average of about 20 pins. , the total number of pins on the cabinet side is about 5000. [000...

AI Technical Summary

Problems solved by technology

[0004] According to the design, after the pins in the plug are welded with the signal cables on site, they need to be installed in the reserved holes of the plug. There is a small anti-drop card around the tail end of the pins to prevent the pins after installation from being in contact with the cabinet. After the side female jacks are docked, the pins are retracted, resulting in unreliable installation

With the increase of the time after the installation of the plug on the cabinet side, the performance of the pins decreases, and the pins need to be repaired or replaced.

[0005] During the working process, it was found that due to the limitation of the anti-dropping design, it was difficult for the pin to withdraw from the reserved hole. During the process of taking out the pin, the pin and the socket hole were often damaged.

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