Nuclear power station pool filter screen and disassembly method thereof

A technology for a nuclear power plant and a filter screen is applied in the field of a nuclear power plant pool filter screen and its disassembly and assembly, which can solve the problems of long time consumption, complicated operation, unreasonable filter screen structure setting, etc., and achieve the effect of reducing the stay time and saving time.

Active Publication Date: 2019-10-15
中广核工程有限公司 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that due to the unreasonable setting of the filter screen structure, the dismantling of the fine filter screen requires operating tools such as operating rods, replacement baskets, and transfer trolleys, and the operation is complicated and time-consuming. It provides a nuclear power plant pool filter screen and its dismantling installation method

Method used

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  • Nuclear power station pool filter screen and disassembly method thereof
  • Nuclear power station pool filter screen and disassembly method thereof
  • Nuclear power station pool filter screen and disassembly method thereof

Examples

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Embodiment 1

[0058] Embodiment 1. The embodiment of the present invention provides a nuclear power plant pool filter, see figure 1 and figure 2 , including a bushing assembly 1, which is arranged at the bottom of the pool and communicates with the refueling water tank inside the containment;

[0059] Coarse strainer 2, which is arranged at the bottom of the casing assembly 1, is used to filter debris in the pool; since the coarse strainer 2 works during unit operation, it prevents large debris from entering the PTR pipeline 17 ( see image 3 ), it is installed at the bottom of bushing assembly 1, and it does not need to be replaced during unit operation and refueling.

[0060] Fine filter 3, which is arranged on the top of the sleeve assembly 1, and is connected with the sleeve assembly 1 by rotation, is used to filter the hot spots in the pool; the fine filter 3 is only used when refueling Use it, remove it after refueling, and install it on the top of the bushing assembly 1, which is...

Embodiment 2

[0092] Embodiment 2, the present invention provides a kind of disassembly method of nuclear power plant pool filter net, comprises the following steps:

[0093] Before the pool is not filled with water, install the coarse filter 2 and the fine filter 3 on the bottom and top of the sleeve assembly 1 respectively, and the fine filter 3 and the sleeve assembly 1 are Rotary snap connection;

[0094] One end of the rope assembly 4 is connected with the fine filter screen 3, and the other end is placed on the top operating platform of the nuclear power plant pool;

[0095] After the pool is drained, the rope assembly 4 is pulled with force, so as to rotate and loosen the fastening connection between the fine filter 3 and the sleeve assembly 1, and extract the fine filter 3 from the pool.

[0096] Specifically, during refueling overhaul and before the pool is not filled with water, the operator enters the bottom of the pool through a ladder, installs the fine filter 3 on the bushing...

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Abstract

The invention provides a nuclear power plant pool filter screen and a disassembly method thereof, belonging to the technical field of nuclear power plant equipment. The filter screen comprises a sleeve assembly, a coarse filter screen, a fine filter screen and a rope assembly. The sleeve assembly is arranged at the bottom of a water pool and is communicated with a replacement material water tank in a containment vessel. The coarse filter screen is arranged at the bottom of the sleeve assembly. The fine filter screen is arranged on the top of the sleeve assembly and is rotationally clamped andconnected with the sleeve assembly; one end of the rope assembly is connected with the fine filter screen, and the other end of the rope assembly is placed on a top operating platform of the nuclear power plant water pool, and is used for rotating and loosening the clamping connection between the fine filter screen and the sleeve assembly after applying of a force, and taking the fine filter screen out from the water pool. When in use, the rotation and lifting of the fine filter screen can be skillfully solved by directly operating the rope assembly on the top operating platform, thus avoidingthe scheme of using an operating rod, a replacing basket and a transferring trolley, saving time and simultaneously reducing the staying time of personnel in a radiation area.

Description

technical field [0001] The invention relates to the technical field of nuclear power plant equipment, in particular to a nuclear power plant water pool filter screen and a disassembly method thereof. Background technique [0002] Coarse filter screens and fine filter screens are installed on the bottom installation pipes of nuclear power plant pools (including reactor cavity pools and reactor internals storage pools). [0003] Among them, the coarse filter is used during power operation to shutdown conditions and before the pool is filled with water to filter debris in the pool after the accident and ensure the smooth flow of the pipeline leading to the refueling water tank (IRWST) inside the containment at the bottom. Make sure the water in the pool is able to return to the IRWST. Fine filter screen, used in refueling shutdown conditions and before tank filling, to avoid bringing hot spots in the tank into the downstream circuit during normal operation. [0004] After the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D29/96B01D29/56G21C19/07
CPCB01D29/56B01D29/96G21C19/07Y02E30/30
Inventor 李石磊何英勇张峰张译寒陈笋赵小红
Owner 中广核工程有限公司
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