An On-Line Displacement Technology of Nuclear Reactor Neutron Flux Tube
A nuclear reactor and neutron technology, applied in the field of nuclear power plant maintenance, can solve problems such as breakage, thinning of pipe walls, and leakage of coolant in the primary circuit, and achieve the effect of ensuring tightness, dimensional accuracy and position accuracy of grooves
Active Publication Date: 2021-06-22
CNNC NUCLEAR POWER OPERATION MANAGEMENT
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Problems solved by technology
The neutron flux tube is one of the pressure boundaries of the primary circuit of the reactor system. Because of the mechanical wear caused by radiation embrittlement and flow-induced vibration, the tube wall will be thinned or even damaged, which will cause the primary circuit coolant to leak and pollute the local area.
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[0041] The on-line displacement process of a nuclear reactor neutron flux tube according to the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0042] like figure 1 As shown, a nuclear reactor neutron flux tube on-line displacement process, using a neutron flux tube on-line processing device, includes the following steps:
[0043] Step 1. Preparation before the displacement of the neutron flux tube;
[0044] Step 2, the centering cutting of the neutron flux tube handle;
[0045] Step 3, the handle block is cut and separated from the neutron flux tube;
[0046] Step 4: Weld the neutron flux tube.
[0047]Further, the neutron flux tube on-line processing device includes a mainframe part, a mainframe turning part, a mainframe adjusting part, and a height adjusting part, and the mainframe part includes: a power motor, a knife block, and a tool holder; The main engine adjusting and turning part ...
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The invention relates to an on-line shifting process of a neutron flux tube in a nuclear reactor, which uses an on-line neutron flux tube processing device, comprising the following steps: step 1, preparing for neutron flux tube shifting; step 2, neutron flux tube Centering cutting of the flux tube handle; Step 3, cutting and separating the handle block from the neutron flux tube; Step 4, welding the neutron flux tube. The present invention has the following advantages: (1) the cutting and groove processing operations of the neutron flux tube handle block and extension section can be completed through this process, and the dimensional accuracy and position accuracy of the groove can be ensured; (2) the process can Ensure that the displacement size of the neutron flux tube that needs to be shifted meets the requirements; (3) This process can ensure that the weld size and surface finish of the neutron flux tube after welding meet the requirements; (4) This process can ensure that the neutron flux tube meets the requirements. The sealing performance of the flux tube meets the requirements; (5) This process can ensure that the welding of the neutron flux tube meets the requirements for use in the reactor.
Description
technical field [0001] The invention belongs to the technical field of maintenance of nuclear power plants, and in particular relates to an on-line displacement process of a neutron flux tube of a nuclear reactor. Background technique [0002] The reactor neutron flux tube of the pressurized water reactor nuclear power plant is one of the key equipment of the pressurized water reactor nuclear power plant. The number of measuring tubes varies according to different stack types, generally between 20 and 50. As the measurement channel of the neutron flux of the core nuclear testing system, the neutron flux tubes are evenly distributed in the core fuel assembly channel, penetrate the fuel assembly, and are exposed in the core. The neutron flux tube is one of the pressure boundaries of the primary circuit of the reactor system, because the mechanical wear caused by radiation embrittlement and flow-induced vibration will make the tube wall thin or even damaged, which will lead to...
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IPC IPC(8): B23P23/04B23P13/00
CPCB23P13/00B23P23/04
Inventor 王成林高俊周伟王安宁施雪峰范伟顾为柏王朋徐耀宗
Owner CNNC NUCLEAR POWER OPERATION MANAGEMENT