High-temperature gas cooled reactor helium compressor isolation pressure maintaining overhaul method and device

A technology for high-temperature gas-cooled reactors and maintenance devices, which is applied to lifting devices, reduction of greenhouse gases, and reactors. It can solve the problems of long shutdown time, large economic losses, and access to the primary circuit, etc., to reduce shutdown time and facilitate maintenance. , Guarantee the effect of reliability and life

Pending Publication Date: 2020-07-31
CHINERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The helium compressor in the demonstration project is located above the steam generator. The helium compressor is at the hot end of the helium cycle. The helium in the motor cavity is cooled by a nuclear secondary cooler, so that the motor and the electromagnetic drive device work at Appropriate temperature. If there is a problem with the operation of the helium compressor during operation, the reactor needs to be completely shut down, the top cover is completely opened, and the helium compressor is hoisted out into the atmosphere isolation device (filled with helium)

Method used

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  • High-temperature gas cooled reactor helium compressor isolation pressure maintaining overhaul method and device
  • High-temperature gas cooled reactor helium compressor isolation pressure maintaining overhaul method and device
  • High-temperature gas cooled reactor helium compressor isolation pressure maintaining overhaul method and device

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[0031] The high-temperature gas-cooled reactor helium compressor isolation and pressure maintenance maintenance device provided by the present invention has a structure such as figure 2 with image 3 As shown, it includes a screw lifting body, a clamping sleeve body 2, a pressure vessel cylinder 3, an upper support plate 6, a lower support plate 1, an upper maintenance isolation valve 13 and a lower maintenance isolation valve 10, the clamping sleeve body 2 It is sleeved on the outside of the pressure vessel cylinder 3, the clamping sleeve body 2 is provided with a cooling water inlet 22 and a cooling water outlet 16, the pressure vessel cylinder 3 is provided with a vacuum port 18, and the pressure vessel cylinder 3 is on the upper inner wall The guide rail 8 is processed; the helium compressor 7 is placed on the upper support plate 6 inside the pressure vessel cylinder 3; the upper maintenance isolation valve 13 and the lower maintenance isolation valve 10 are installed on the...

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Abstract

The invention relates to a high-temperature gas cooled reactor helium compressor isolation pressure maintaining overhaul method and device, and belongs to the technical field of reactor equipment sealing and overhaul. When a reactor runs normally, a spiral lifting overhaul device in the overhaul device is arranged in helium atmosphere at the upper part of a pressure vessel. When maintenance is needed, a helium compressor is lowered to a lower limit position through the overhaul device, a pressure maintaining overhaul isolation valve is closed, a loop pressure boundary is reconstructed, and a to-be-maintained part is isolated outside for overhaul; after overhauling is completed, the overhauled helium compressor is jacked through the spiral lifting overhaul device and abuts against the uppersealing face to achieve pretightening force, and sealing is achieved; the spiral lifting overhaul device is driven by a motor and a speed reducer and is lifted along guide rails which are uniformly distributed on the inner wall and have a self-locking function; and a jacket cooling system exchanges heat with the metal wall surface of the equipment, cools the environment in the equipment, maintains a local low-temperature helium environment, and prevents insulation overtemperature failure of a helium compressor stator winding and failure of a gear motor.

Description

Technical field [0001] The invention relates to a high-temperature gas-cooled reactor helium compressor isolation and pressure maintenance maintenance method and a device thereof, belonging to the technical field of reactor equipment sealing and maintenance. Background technique [0002] The high-temperature gas-cooled reactor is a type of gas-cooled reactor that uses helium as the coolant. The core outlet temperature is close to 750-1000°C. The high-temperature gas-cooled reactor nuclear power plant uses helium compressors to drive the helium coolant to circulate and start the reactor. , Power operation and reactor shutdown and other working conditions provide sufficient flow of helium to pass through the primary loop system to take away the heat generated by the reactor core and ensure core cooling. The helium compressor in the demonstration project is located above the steam generator, and the helium compressor is at the hot end of the helium cycle. A nuclear secondary cooler ...

Claims

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Application Information

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IPC IPC(8): F16J12/00B66F3/08G21C17/00
CPCB66F3/08F16J12/00G21C17/00Y02E30/30
Inventor 孟东旺赵彬彬金东杰
Owner CHINERGY CO LTD
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