Neutron gamma combined measuring equipment

A measuring device and neutron technology, applied in the direction of material analysis using radiation, etc., can solve the problems of accurate quantification, difficult internal nuclear materials, etc., and achieve the effect of convenient operation

Active Publication Date: 2013-08-14
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology

However, for materials with complex composition or unknown types of internal nuclear materials, it is difficult to accurately quantify the internal nuclear materials only by measuring the gamma-ray emission rate or one of the neutrons. Simultaneous emissivity measurement device for comprehensive analysis and measurement of waste bin core materials

Method used

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  • Neutron gamma combined measuring equipment

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Embodiment 1

[0022] Neutron gamma joint measuring device, such as figure 1 The device includes a gamma detector part 3 and a transmission source part 2. The key point is that the device also includes a neutron measuring device 1. When measuring the material in the waste bucket, the neutron measuring device 1 is fixed and the waste bucket is on the rotating platform. 4 rotates upward, the transmission source part 2 and the gamma detector part 3 move synchronously in the height direction of the waste bucket, so as to realize the simultaneous measurement of neutrons and gamma rays in the waste bucket.

[0023] The neutron measuring device 1 is a semi-cylindrical neutron measuring ring, which is made of polyethylene, and 20 pieces are embedded near the inner side of the semi-cylindrical 3 He neutron tube, 3 The height of the effective center point of the He neutron tube is consistent with the height of the center of the waste bucket.

[0024] The γ detector part 3 is equipped with a lead collimato...

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Abstract

The invention belongs to the technical field of radioactive waste detection, and discloses neutron gamma combined measuring equipment. The neutron gamma combined measuring equipment comprises a gamma detector part, a transmission source part and a neutron measurement device. When the neutron gamma combined measuring equipment is used for measuring materials in waste bin, the neutron measurement device is fixed, the waste bin rotates on a rotating platform, and the transmission source part and the gamma detector part synchronously move in the height direction of the waste bin to realize simultaneous measurement by neutrons and gamma rays in the waste bin. The equipment is easy to operate, and can perform quantitative analysis on the materials in the waste bin.

Description

technical field [0001] The invention belongs to the technical field of radioactive waste detection, and in particular relates to a combined neutron-gamma measurement device. Background technique [0002] During the production, operation and decommissioning process of nuclear facilities, a large amount of radioactive solid waste is generated. The waste generation unit usually reconditions these wastes and puts them into 208-liter standard waste barrels. Before disposing of these nuclear wastes, they must be accurately identified and measured to distinguish the types of nuclear materials contained in the waste and accurately measure the amount of nuclear materials contained in them, so that the nuclear waste can be processed and disposed of. [0003] In the measurement of nuclear waste barrels, for the measurement object whose source of nuclear waste is fixed and known, the neutron emission rate or the characteristic gamma ray emission rate can be measured to determine the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/09
Inventor 柏磊邵婕文程毅梅刘宏斌刘大鸣何丽霞王仲奇祝利群
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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