Structure steel material suitable for fusion reactor

A technology for structural steel and fusion reactors, used in heat treatment equipment, heat treatment process control, manufacturing tools, etc.

Inactive Publication Date: 2006-11-15
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As the structural steel material of the nuclear fusion reactor, it is required to have good mechanical properties, high temperature creep characteristics and radiation embrittlement resistance. The existing structural steel materials have their own advantages and disadvantages. Compared with the requirements of the first wall of the fusion reactor There are still many shortcomings

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Embodiment Construction

[0010] A structural steel material suitable for fusion reactors, in which the percentages of each component in the total mass are: the matrix is ​​Fe element, Cr 9.0%, W 1.5%, V 0.20%, Ta 0.15%, Mn 0.45%, C 0.10% . The strict control requirements for the impurity components that can produce long-lived radionuclides after neutron irradiation are: N<0.002%, Ni 0.005%, Mo 0.005%, Nb 0.001%, Co 0.005%, Cu 0.005%, for other impurities Element control requirements are: O 0.01%, P 0.005%, S 0.005%, Al<0.01%.

[0011] The final heat treatment system is: 960-1040°C / 25-35min quenching; 740-780°C / 80-100min tempering.

[0012] The steel belongs to martensitic steel, which has superior properties such as high thermal conductivity, low thermal expansion coefficient, good high temperature creep resistance and low swelling rate under neutron irradiation. The steel has a body-centered square structure, so the swelling rate under neutron irradiation is lower than that of austenitic stainless ...

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Abstract

A structural steel material is suitable to fusion reactor, it is a martensite steel with low activation and is composed of element Fe, and it also contains the alloys Cr, W, V, Ta, Mn and C. It is suitable to use in the fusion reactor which has the resistance against the irradiation. The recipe of this steel replaces the elements Mo, Nb and Ni which are contained in the normal steels with W, Ta, V and Mn, so it assures the characteristic of low activation. Through optimization of the ingredients, the main nature of the steel increases. At the same time we strictly control the lever of long nuclear lifetime radioactive impurity which is created by irradiation with neutron. The half-life of the radioactive species which activated by irradiation with neutron is short, and the lever can be decreased to lower than the operational lever 10mSv / h in 100 years.

Description

technical field [0001] The invention relates to a low-activation martensitic steel suitable for fusion reactors, which can resist strong neutron radiation. Background technique [0002] Fusion energy is a kind of clean nuclear energy, and the structural materials used in it are required to be low-activation materials. The main components of fission reactor structural materials widely used at present contain elements such as Fe, Mn, Ni, Mo, etc. Among them, Ni, Mo, etc. will produce long-lived radionuclides after being irradiated by neutrons, and the half-life of some radionuclides can be as long as Tens of thousands or even hundreds of thousands of years. This poses a serious challenge to the nuclear waste disposal of nuclear power plants. Not only is the disposal cost very high, but it is also extremely unsafe and unsuitable for fusion reactors. Therefore, in order to minimize the potential radioactive hazards caused by material activation and reduce the post-processing a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/18C21D1/18C21D11/00
Inventor 黄群英郁金南吴宜灿李艳芬李春京
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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