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Graphite dust pollution removal method for ball bed high-temperature gas-cooled reactor

A high-temperature gas-cooled reactor and graphite dust technology, which is applied in the field of nuclear pollution prevention and control, can solve problems such as graphite dust pollution, and achieve the effect of solving the problem of graphite dust pollution.

Active Publication Date: 2019-08-06
CHINA INST FOR RADIATION PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a graphite dust collection device for pebble bed high temperature gas-cooled reactor, which can effectively capture the graphite dust produced in the pebble bed high temperature gas-cooled reactor during loading and operation, and solve the problem of high temperature of pebble bed. Graphite dust pollution problem unique to gas-cooled reactors

Method used

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  • Graphite dust pollution removal method for ball bed high-temperature gas-cooled reactor
  • Graphite dust pollution removal method for ball bed high-temperature gas-cooled reactor
  • Graphite dust pollution removal method for ball bed high-temperature gas-cooled reactor

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Embodiment 1

[0045] During the daily operation of the pebble bed pile, according to 5%-10% of the total number of fuel elements, the capture device is sent into the pebble bed pile alternately with the fuel elements through the charging system of the pebble bed pile, and they circulate together in the primary circuit. Captures the dust generated during the cycle phase. After the cycle is completed, the trapping device is discharged from the pebble bed pile through the unloading system of the pebble bed pile for non-destructive testing. If there is no damage, the capture device continues to be used; if it is damaged, the capture device is discontinued, disposed of as solid waste, and, according to the amount of damage, a new capture device is added to the pebble bed pile. It is confirmed that the removal rate of graphite dust in this embodiment is 55%.

Embodiment 2

[0047] During the daily operation of the pebble bed stack, firstly, according to 10%-20% of the total number of fuel elements, the capture device is loaded into the pebble bed stack through the charging system of the pebble bed stack, and then the fuel is loaded through the charging system The element, which starts to circulate in the primary circuit, captures the dust generated during the cycle phase. After the cycle is completed, the trapping device is discharged from the pebble bed pile through the unloading system of the pebble bed pile for non-destructive testing. If there is no damage, the capture device continues to be used; if it is damaged, the capture device is discontinued, disposed of as solid waste, and, according to the amount of damage, a new capture device is added to the pebble bed pile. It is confirmed that the removal rate of graphite dust in this embodiment is 60%.

Embodiment 3

[0049] When the pebble bed pile is shut down for overhaul, according to 50% of the total fuel elements, the capture device is added to the inside of the pebble bed pile through the charging system of the pebble bed pile, and circulates in the primary circuit to capture the dust generated inside the pebble bed pile . After the cycle is completed, the trapping device is discharged from the pebble bed pile through the unloading system of the pebble bed pile for non-destructive testing. If there is no damage, the capture device continues to be used; if it is damaged, the capture device is discontinued, disposed of as solid waste, and, according to the amount of damage, a new capture device is added to the pebble bed pile. It is confirmed that the removal rate of graphite dust in this embodiment is 65%.

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Abstract

The invention belongs to the technical field of nuclear pollution prevention and control, and relates to a graphite dust pollution removal method for a ball bed high-temperature gas-cooled reactor. The method comprises the following steps: (1) the ball bed high-temperature gas-cooled reactor is filled with a plurality of collecting devices alone or together with a fuel element through a ball bed high-temperature gas-cooled reactor loading device; (2) the collecting devices remove graphite dusts generated in the filling and running process of the ball bed high-temperature gas-cooled reactor; and (3) the collecting devices are circulated in the ball bed high-temperature gas-cooled reactor alone or together with the fuel element multiple times, and then are discharged through a discharging device. The graphite dust pollution removal method for the ball bed high-temperature gas-cooled reactor can effectively collect the graphite dusts generated in the filling and running process of the ball bed high-temperature gas-cooled reactor, and solves the unique problem of graphite dust pollution of the ball bed high-temperature gas-cooled reactor.

Description

technical field [0001] The invention belongs to the technical field of nuclear pollution prevention and control, and relates to a method for removing graphite dust pollution for a pebble bed high-temperature gas-cooled reactor. Background technique [0002] High Temperature Gas-cooled Reactor (HTR, High Temperature Gas-cooled Reactor) is known as an advanced reactor type "with the characteristics of the fourth-generation nuclear energy system". Due to the use of high-temperature-resistant graphite as a moderator, the use of helium with excellent thermal performance and ceramic-type coated particle fuel, HTR has a high operating temperature (750-900°C) and thermal efficiency (40%-60%) . At present, my country's HTR uses spherical fuel elements. For example, the 10MW high-temperature gas-cooled test reactor (HTR-10) of Tsinghua University and the Shandong Shidaowan high-temperature gas-cooled reactor nuclear power plant demonstration project (HTR-PM) both use spherical fuel e...

Claims

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Application Information

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IPC IPC(8): G21F9/00G21F9/02
CPCG21F9/001G21F9/02Y02E30/30
Inventor 刘宇辰梁宇郭丽潇邓少刚张文俊梁栋李宁王旭东王永仙武明亮刘东于文利
Owner CHINA INST FOR RADIATION PROTECTION
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