High-use-temperature accident-condition-resistant radiation-resistant material and preparation method thereof

An accident working condition and anti-irradiation technology, applied in the field of nuclear radiation protection, can solve problems such as plasticizing collapse, unsafety, and inability to maintain shielding functions, and achieve improved mechanical properties, improved heat resistance and radiation resistance, The effect of Vicat softening point improvement

Active Publication Date: 2021-08-06
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: the existing shielding material based on polyethylene material will plasticize and collapse in a short time under the ambient temperature of the accident working condition, cannot maintain the shielding function, and will flow, aggravating the unsafety in the pile sex

Method used

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  • High-use-temperature accident-condition-resistant radiation-resistant material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A method for preparing a radiation-resistant material with high service temperature and accident-resistant working conditions, comprising the following steps:

[0039] Step 1, preparation of radiation-resistant compound additive

[0040] Weigh the nanometer yttrium oxide and polyolefin anti-aging composite system according to the mass ratio of 3:100 and put it into a ball mill tank, add 8% ethanol of the aforementioned material, and then add zirconia balls for ball milling, the nanometer oxide The mass of the yttrium and polyolefin anti-aging composite system and the mass ratio of the ball to the ball are 1:10, the ball milling speed is 800 rpm, the ball milling time is 12 hours, and the radiation-resistant compound additive is obtained by sieving and discharging;

[0041] The polyolefin anti-aging composite system is a mixture of phenolic anti-aging agent and phosphite anti-aging agent according to the mass ratio of 1:5;

[0042] Step 2. Mix lead powder and boron carb...

Embodiment 2

[0056] The difference between this example and Example 1 is that the lead powder content is 40wt%, the boron carbide powder content is 10wt%, the ultra-high molecular weight polyethylene content is 47.5wt%, and the radiation-resistant additive is 2.5wt%.

Embodiment 3

[0058] The difference between this example and Example 1 is that the molecular weight of the ultra-high molecular weight polyethylene is 3 million.

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Abstract

The invention discloses a high-use-temperature accident-condition-resistant radiation-resistant material and a preparation method thereof, and solves the technical problems that an existing shielding material taking a polyethylene material as a matrix can be plasticized and collapsed in a very short time at an accident condition environment temperature, cannot keep a shielding function, flows and aggravates insecurity in a reactor. The high-use-temperature accident-condition-resistant radiation-resistant material comprises ultra-high molecular weight polyethylene, a shielding substance and an irradiation-resistant composite additive, wherein the irradiation-resistant composite additive is formed by compounding a nano rare earth oxide and an organic irradiation-resistant composite system. The material has the advantages of good mechanical properties and anti-radiation performance and the like.

Description

technical field [0001] The invention relates to the technical field of nuclear radiation protection, in particular to an anti-radiation material with high operating temperature and accident resistance and a preparation method thereof. Background technique [0002] Lead-boron polyethylene can shield gamma rays, moderate fast neutrons and absorb thermal neutrons at the same time. The hydrogen content of polyethylene is up to 14%, and it has excellent molding and processing performance. It has excellent filling performance for lead and boron carbide materials, so Lead-boron polyethylene material is an ideal comprehensive ray field shielding material. There are a large number of applications in the primary and secondary circuit shielding of model engineering. [0003] At present, the technology for producing lead-boron polyethylene is relatively mature, but most of the polyethylene used in it is high-density polyethylene or low-density polyethylene, which is easily deformed or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K3/22C08K5/13C08K5/524C08K3/08C08K3/38C08K13/02
CPCC08K3/22C08K5/13C08K5/524C08K3/08C08K3/38C08K13/02C08K2003/221C08L2201/08C08L2207/068C08L23/06
Inventor 吴莹甘斌何大明李书良李锋罗绪珍易伟朱其猛
Owner NUCLEAR POWER INSTITUTE OF CHINA
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