Hotspot backwash device for instrument pipes of main pipelines of nuclear power stations
An instrument tube and backwashing technology, which is applied in the field of nuclear power, can solve the problems of increasing the collective dose of power plant personnel and the increase of environmental dose around the main pipeline, and achieve the effect of preventing the backflow of radioactive medium, preventing overpressure or low flow cavitation
Pending Publication Date: 2019-05-10
JIANGSU NUCLEAR POWER CORP
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Problems solved by technology
[0002] The primary circuit system of a nuclear power plant with a 4-loop design, with the increase of the operating time of the unit, a large number of radiant heat particles are deposited at the elbow of the instrument sampling pipeline of the main pipeline of the primary circuit, causing the environmental dose around the main pipeline to increase year by year and increase significantly collective dose
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[0020] The following is a further detailed description of a nuclear power plant main pipeline instrument pipe hot spot backwashing device provided by the present invention with reference to the accompanying drawings and embodiments.
[0021] Such as figure 1 , 2 , 3, a nuclear power plant main pipeline instrument tube hot spot backwashing device provided by the present invention includes a hand trolley 1, a threading hose 2, a controller 3, a centrifugal pump and a motor 4, and a pressure transmitter 5 , pump water inlet stainless steel pipeline 6, pump water outlet stainless steel pipeline 7, pump circulation stainless steel pipeline 8, stainless steel pipeline 9, stainless steel instrument pipeline 10, stainless steel instrument tube manual shut-off valve 11, pump circulation stainless steel pipeline manual shut-off valve 12, pump outlet fast Connector 13, pump water inlet quick connector 14, water intake hose 17, water outlet hose 18, check valve 19, tee 20, outlet hose qu...
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The invention belongs to the technical field of nuclear power, and particularly discloses a hotspot backwash device applicable to instrument pipes of main pipelines of nuclear power stations. The hotspot backwash device comprises a hand trolley, a threading hose, a controller, a centrifugal pump and motor combination, a pressure transmitter, a pump water inlet stainless steel pipeline, a pump water outlet stainless steel pipeline, pump circulation stainless steel pipelines, a stainless steel pipeline, stainless steel instrument pipelines, stainless steel instrument pipe manual stop valves, a pump circulation stainless steel pipeline manual stop valve, pump water outlet port quick connectors, a pump water inlet port quick connector, a water fetching hose, a water outlet hose, a check valve,a tee, a water outlet hose quick connector, an instrument quick connector, a drain valve, a drain hose, a low-liquid-level float switch, a water tank manual stop valve, a water tank outlet port quickconnector and a water tank. The hotspot backwash device has the advantages that backwash can be simultaneously carried out on the four instrument pipes by the hotspot backwash device, and accordinglybackwash work can be efficiently accomplished by the hotspot backwash device.
Description
technical field [0001] The invention belongs to the technical field of nuclear power, and in particular relates to a backwashing device suitable for hot spots of instrument pipes in main pipelines of nuclear power plants. Background technique [0002] The primary circuit system of a nuclear power plant with a 4-loop design, with the increase of the operating time of the unit, a large number of radiant heat particles are deposited at the elbow of the instrument sampling pipeline of the main pipeline of the primary circuit, causing the environmental dose around the main pipeline to increase year by year and increase significantly The collective dose of the power station personnel. [0003] In order to reduce the environmental dose rate of the main pipeline, it is necessary to carry out the backwashing of the radiation hot spot of the instrument sampling pipeline of the main pipeline during each overhaul, so as to reduce the environmental dose in the main pipeline area of the...
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Login to View More IPC IPC(8): G21D1/00
CPCY02E30/00
Inventor 宋瑞建董保录朱峰乔峰侯耀苏本新董世友徐霞军黄亚宁杨林远武义德黄国柱张建张桂虎马程耀吴金堤郑新城程天宇苗磊
Owner JIANGSU NUCLEAR POWER CORP