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An overall reassembly device and reassembly process of a large shielded main pump in a radioactive environment

A radioactive and environmental technology, applied to parts, shields, pumps, etc. of pumping devices used for elastic fluids, can solve the problems of difficult manual handling, large radioactive dose and heavy quality of shielded main pump casings

Active Publication Date: 2021-05-04
SANMEN NUCLEAR POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cleaning of the main bolt hole has the following restrictive factors: 1. The main bolt hole has a long internal depth and is arranged upside down, which makes it difficult for maintenance personnel to clean the main bolt hole, and the clearing effect is not obvious
2. After the shielded main pump has been running for a long time, the radioactive dose inside the pump casing of the shielded main pump is relatively large
Due to the large size and heavy weight of the main bolt, it is difficult to carry it manually, and it is not suitable for maintenance personnel to operate, which brings great difficulties to the disassembly and assembly of the main bolt.

Method used

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  • An overall reassembly device and reassembly process of a large shielded main pump in a radioactive environment
  • An overall reassembly device and reassembly process of a large shielded main pump in a radioactive environment
  • An overall reassembly device and reassembly process of a large shielded main pump in a radioactive environment

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Embodiment Construction

[0063] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0064] A dismantling device for a large-scale shielded main pump in a radioactive environment, including a biological shielding component, a C-shaped sealing ring cleaning component, a biological shielding blocking plate lifting component, a main bolt hole cleaning and inspection component, and a main bolt pneumatic disassembly component. in:

[0065] The biological shielding assembly includes a biological shielding blocking board 13 and a blocking board bracket 18, and the biological shielding blocking board 13 is supported above the blocking board bracket 18; The position and posture of the blocking plate support 18 with the biological shielding blocking plate 13 realize the assembly and disassembly of the biological shielding blocking plate 13 and the pump casing 112 of the nuclear reactor main pump.

[0066] Described biological ...

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Abstract

The invention relates to an integral reassembly device and a reassembly process of a large shielded main pump in a radioactive environment, belonging to the technical field of maintenance of a large shielded main pump of a nuclear power plant. The invention includes a biological shielding assembly, a C-shaped sealing ring cleaning assembly, a biological shielding blocking plate lifting assembly, a main bolt hole cleaning and inspection assembly, and a main bolt pneumatic disassembly assembly. The invention has simple operation and can safely and efficiently complete the reassembly of the large shielded main pump.

Description

technical field [0001] The invention relates to the technical field of maintenance of a large-scale shielded main pump of a nuclear power plant, in particular to an integral reassembly device and a reassembly process of a large-scale shielded main pump in a radioactive environment. Background technique [0002] After a long period of operation of the nuclear power plant, the shielded reactor coolant pump (hereinafter referred to as: shielded main pump) may have problems with thrust bearings, shielding sleeves, and lower locking cups. The nuclear power plant has planned to shield the main pump as a whole. For the disassembly process, it is necessary to plan and develop the overall reassembly process of the shielded main pump in a radioactive environment in advance. The pump casing of the shielded main pump is welded to the bottom head of the steam generator, and installed upside down on the pump casing through 24 main bolts. The space around the shielded main pump is compact...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/62F04D29/00G21F3/00
CPCF04D29/007F04D29/628G21F3/00
Inventor 李涛李松耿加森董宝泽王斌元廖长城王信东曹阳郦元辉王扬王超林鑫辉杨志业
Owner SANMEN NUCLEAR POWER CO LTD
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