A calibrating device for a thermal neutron fluence rate in silicon single crystal irradiation channel in a nuclear reactor

A technology for nuclear reactors and calibration devices, which is applied in the fields of nuclear reactor monitoring, reactors, and nuclear engineering. The effect of sub-fluence rate in time

Active Publication Date: 2016-04-06
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a calibration device for the thermal neutron fluence rate of the silicon single crystal irradiation tunnel of a nuclear reactor, so as to overcome the inaccurate measurement results caused by the direct measurement of the thermal neutron fluence rate in the existing micro-fission chamber. Accurate, untimely issues
[0005] The existing measurement of the irradiated neutron fluence rate is directly measured by a miniature fission chamber. Because the thermal neutron fluence rate in the irradiated tunnel has many uncertainties and inconsistencies in time and space, it cannot be accurately measured. Measuring the thermal neutron fluence rate in the irradiated tunnel, it is even impossible to measure the neutron fluence rate when the silicon is irradiated

Method used

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  • A calibrating device for a thermal neutron fluence rate in silicon single crystal irradiation channel in a nuclear reactor
  • A calibrating device for a thermal neutron fluence rate in silicon single crystal irradiation channel in a nuclear reactor

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Embodiment 1

[0025] Such as figure 1 , figure 2 As shown, the calibration device for the thermal neutron fluence rate of the silicon single crystal irradiation channel of a nuclear reactor includes an aluminum cylinder 2, one end of the aluminum cylinder 2 is provided with a base 1, and the other end is provided with a top cover 3, and the top cover 3 A through hole is provided in the center of the aluminum cylinder body 2. A silicon single crystal rod body 5 is arranged inside the silicon single crystal rod body 5. A round hole is arranged on the axis of the silicon single crystal rod body 5. The opening end of the round hole is opposite to the through hole. The micro fission chamber 6 The sensitive section is inserted into the bottom of the round hole, the miniature fission chamber 6 is set in the fixed pipe 7, the hoisting head 9 is connected to the top cover 3 through the connecting column 4, and the connecting column 4 is provided with a through hole I that matches the through hole i...

Embodiment 2

[0027] Such as figure 1 , figure 2 As shown, this embodiment is based on Embodiment 1, and the silicon single crystal rod body 5 is consistent with the silicon conditions to be irradiated and processed; the depth of the circular hole is 7 / 10 of the length of the silicon single crystal rod body 5; One end of the tube 7 inserted into the aluminum cylinder 2 is sleeved with a sleeve 8 .

Embodiment 3

[0029] Such as figure 1 , figure 2 As shown, this embodiment is based on Embodiment 1, and a guide head 10 is provided on the outside of the base 1; the guide head 10 is a conical structure with an arc-shaped end.

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Abstract

The invention relates to a calibrating device for a thermal neutron fluence rate in silicon single crystal irradiation channel in a nuclear reactor. The device comprises an aluminum cylinder. One end of the aluminum cylinder is provided with a pedestal and the other end is provided with a top cover. The middle of the top cover is provided with a through hole. A silicon single crystal rod is disposed in the aluminum cylinder, and is provided with a circular hole at the axis. The opening end of the circular hole faces the through hole. A sensitive segment of a miniature fission chamber is inserted into the bottom of the circular hole. The miniature fission chamber is sleeved with a fixing tube. A lifting head is connected to the top cover with a joint pin. The joint pin is provided with a through hole I at the axial direction and matching the through hole in the top cover. According to the device, the miniature fission chamber and the silicon single crystal rod are combined by an ingenious manner, so that the environment and conditions during silicon irradiation are stimulated, and state differences between a measuring method and silicone to be irradiated are eliminated. The thermal neutron fluence rate in the silicon irradiation channel can be measured timely and accurately by lifting the device to a part to be measured of the irradiation channel. The device can be directly used for irradiation production.

Description

technical field [0001] The invention relates to the technical field of neutron irradiation processing of nuclear reactors, in particular to a calibration device for thermal neutron fluence rate of silicon single crystal irradiation tunnels of nuclear reactors. Background technique [0002] Although the measurement of the thermal neutron fluence rate in the micro-fission chamber is a common technique, it is difficult to determine the consistency of the result with the fluence rate of the irradiated object due to various time and space differences such as conditions and shapes. Especially in the high-power reactor irradiation tunnel, it is more difficult to measure the irradiation time of the irradiated object by minutes. Therefore, high-quality irradiation processing is required, and it has always been a difficult problem that the thermal neutron fluence rate measurement method can meet multiple requirements quickly, truly and easily. Contents of the invention [0003] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C17/00
CPCG21C17/00Y02E30/30
Inventor 刘凤林宋和平李晓天杨斌邓鹏宇张克强陈伟宋小东
Owner NUCLEAR POWER INSTITUTE OF CHINA
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