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Closed circuit television inspection device

A closed-circuit television and inspection device technology, applied in nuclear power generation, nuclear reactor monitoring, reactors, etc., can solve problems such as corrosion and cracks in bell mouth welds, and achieve the effect of reducing radiation dose

Active Publication Date: 2010-03-17
中广核(深圳)运营技术与辐射监测有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the long-term exposure to high radiation, high temperature and high pressure inside the sealed vessel, the surfacing layer on the inner surface of the reactor pressure vessel top cover, the weld seam with the top penetrating piece, and the bell mouth weld seam are prone to cracks, corrosion, etc. Opening defect

Method used

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Embodiment Construction

[0014] A closed-circuit television inspection device for inspecting the inner surface condition of the reactor pressure vessel top cover 1 of a nuclear power plant comprises a platform positioning bracket 21 and a closed-circuit television inspection device 22 arranged on the platform positioning bracket 21 . When it is necessary to carry out CCTV inspection on the pressure vessel top cover 1, it is taken off and placed above the biological shielding ring 24. The biological shielding ring 24 is used to shield the radiation material inside the pressure vessel top cover 1 from leaking out, polluting the environment, and also impact on the health of inspectors. The biological shielding ring 24 is provided with a manhole 26 for pushing in the closed-circuit television inspection equipment.

[0015] The platform positioning bracket 21 includes a push rod 7 whose end is against the inner surface of the bio-shielding ring 24, and it also includes a first pneumatic leg 51 and a second...

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Abstract

The invention relates to a closed circuit television inspection device used for inspecting the condition in a top cover of a reactor pressure container of a nuclear power plant, which comprises a platform positioning bracket and closed circuit television inspection equipment arranged on the platform positioning bracket, wherein the platform positioning bracket comprises a post rod of which one endis pressed against the inner surface of a biological shield ring for placing the top cover of the pressure container, and also comprises a first pneumatic supporting leg and a second pneumatic supporting leg; two matching states exist among the first pneumatic supporting leg, the second pneumatic supporting leg and the post rod; the first matching state is that the pneumatic supporting legs are furled and the first pneumatic supporting leg and the second pneumatic supporting leg are parallel with the post rod; and the second matching state is that the pneumatic supporting legs are unfolded, and certain angles are formed among the first pneumatic supporting leg, the second pneumatic supporting leg and the post rod.

Description

technical field [0001] The invention relates to a closed-circuit television inspection device, in particular to a closed-circuit television inspection device for inspecting the welding seam and the surfacing welding surface condition of a penetrating piece inside a reactor pressure vessel top cover of a nuclear power plant or a conduit and a bell mouth. Background technique [0002] The reactor pressure vessel of a nuclear power plant is the core equipment in the primary circuit system of a nuclear power plant. The top cover of the reactor pressure vessel is located above it. After being connected with the reactor pressure vessel through sealing bolts, a sealed vessel is formed together, which guarantees the nuclear chain fission reaction. safe conduct. [0003] In order to ensure the safe operation of nuclear power plants, according to the relevant regulations on nuclear power plant inspections, reactor pressure vessels are required to conduct closed-circuit television insp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C17/01
CPCY02E30/30
Inventor 李江李明刘金宏曹志军
Owner 中广核(深圳)运营技术与辐射监测有限公司
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