Title:
核物質検知装置
Document Type and Number:
Japanese Patent JP7219442
Kind Code:
B2
Abstract:
To detect nuclear material with high accuracy using a small device.SOLUTION: A positional relation between a neutron beam source 10 and a sample S is determined by phase (angle) of the rotation of a disk 20. A rotation shaft 20A of the disk 20 is driven by a motor, and the rotation is controlled by a computer 40. The output of a neutron detector 30 is also outputted to the computer 40. The computer 40 recognizes a change of count number along with the rotation of the disk 20. Rotation of the disk 20 changes a distance between the neutron beam source 10 and the sample S, this motion moves the neutron beam source 10 to be symmetrical before/after the distance is the smallest, and then, a change is detected in count number of neutrons generated from the sample S with the neutron detector 30. The presence/absence of the nuclear material in the sample S is determined based on a difference between a count number before a state where the distance is the smallest and a count number after the state where the distance is the smallest.SELECTED DRAWING: Figure 1
Inventors:
Masao Yoneda
Nobusuke Fuji
Nobusuke Fuji
Application Number:
JP2018181563A
Publication Date:
February 08, 2023
Filing Date:
September 27, 2018
Export Citation:
Assignee:
Japan Atomic Energy Agency
International Classes:
G01N23/222
Domestic Patent References:
| JP2014174123A | ||||
| JP2157696A | ||||
| JP2222885A | ||||
| JP2013145197A | ||||
| JP2016114385A |
Other References:
米田政夫 他,アクティブ中性子法に適した低コスト中性子検出器の検討,日本原子力学会2018年春の年会,日本,2018年03月,p. 2H16
Attorney, Agent or Firm:
Jo Hori
Yukihiko Maejima
Akira Hasegawa
Murakami Daiyu
Yukihiko Maejima
Akira Hasegawa
Murakami Daiyu