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Surface modification nuclear power station control rod drive mechanism claw

A surface modification and driving mechanism technology, which is applied in the control of nuclear reactions, nuclear power generation, nuclear engineering, etc., can solve the problems of unfavorable batch production, low product qualification rate, and weak process controllability, so as to avoid secondary excitation Radiation dose, simple technical process, simple and reliable structure

Pending Publication Date: 2018-05-22
SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantages are weak process controllability, low product qualification rate, low production efficiency and high manufacturing cost, which is not conducive to mass production

Method used

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  • Surface modification nuclear power station control rod drive mechanism claw
  • Surface modification nuclear power station control rod drive mechanism claw
  • Surface modification nuclear power station control rod drive mechanism claw

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Embodiment Construction

[0028] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] figure 1 It is a schematic diagram of the claws of the traditional surfacing control rod drive mechanism. Generally, 304LN stainless steel claw base 2 is used, and cobalt-based alloys are respectively surfacing on the first shaft hole, the second shaft hole, and the double hook teeth to form the first shaft hole surfacing layer 1, Shaft hole 2 surfacing layer 3, double hook tooth surfacing layer 4, to increase the wear resistance of these moving contact parts.

[0030] Such as figure 2 and 3 As shown, the claw of the surface-modified nuclear power plant control rod drive mechanism provided by the present invention is first manufactured and shaped, and has an integrated structure, including typical features such as the fi...

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Abstract

The invention provides a surface modification nuclear power station control rod drive mechanism claw which comprises a first shaft hole, a second shaft hole and double-hook teeth which are allocated to be subject to surface modification treatment. According to the surface modification nuclear power station control rod drive mechanism claw, when stainless steel is adopted for manufacturing and forming, surface nonmetallic ion permeating treatment is carried out, a core part has the good tenacity, the surface has the good abrasive resistance, corrosion resistance and the fatigue resistance, andthe surface modification technology for improving the claw abrasive resistance, corrosion resistance and the fatigue resistance is simple in process, high in production efficiency, low in manufacturing cost and capable of achieving batch production. Cobalt-base alloys are not used any more, the secondary stimulation radiation dosage is thoroughly avoided, and the favorable environment conditions are provided for overhauling and operation maintenance of a reactor.

Description

technical field [0001] The invention relates to a surface-modified claw of a drive mechanism of a control rod of a nuclear power plant, in particular to a claw of a drive mechanism of a control rod of a nuclear power plant whose surface has been infiltrated with non-metallic ions. Background technique [0002] The role of the control rod drive mechanism (CRDM) in a nuclear power plant is to position the control rod assembly in the vertical direction. By changing or maintaining the position of the control rod assembly through CRDM, it is possible to start and stop the reactor, adjust or maintain the power level of the core during normal operation of the reactor, and quickly shut down the reactor under accident conditions. CRDM controls the action of the moving parts of the claw through the electromagnetic field, and finally drives the movement of the drive rod. Each set of CRDM is composed of two sets of claws, and each set of claws is composed of three sets of claws, pin sh...

Claims

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Application Information

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IPC IPC(8): C23C8/38C23C8/28C23C8/80G21C7/12
CPCG21C7/12C23C8/38C23C8/80Y02E30/30
Inventor 贺小明王德斌史骁辰刘刚周肖佳李岗矫明景益刘晓强宁冬
Owner SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
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