屏蔽放射性废弃物中活性物质的敏感成像
Jana Vasiljević1, Vivian Peters2,3, Anders Puranen3
1Department of Physics, KTH Royal Institute of Technology, 106 91, Stockholm, Sweden. janape@kth.se.
Scientific reports
|November 5, 2024
概括
一种新的中子-射断层扫描 (NGET) 方法增强了非破坏性检测 (NDA) 挑战遗留的放射性废物. 这种被动技术可以准确地识别和定位屏蔽容器中的活性化物,这对于安全处置和保护措施至关重要.
科学领域:
- 核物理 核物理 核物理
- 放射化学 放射化学是指辐射化学.
- 废物管理 废物管理
背景情况:
- 遗留的放射性废物往往缺乏详细的文件,这使得处置评估变得复杂.
- 这些废弃物中的活性化物由于其长半衰期,造成了长期存储库安全挑战.
- 精确检测和定位化物对于安全措施至关重要,特别是在屏蔽或高辐射环境中.
研究的目的:
- 为放射性废物开发和应用一种增强的非破坏性检测 (NDA) 技术.
- 利用中子-射断层扫描 (NGET) 进行敏感的检测和3D定位裂变事件.
- 以有限的文档来解决测试遗留废物的挑战,特别是关于活性化物.
主要方法:
- 采用了使用快速有机闪器的中子-射断层扫描 (NGET).
- 检测到来自自发或诱导裂变的相关快速中子和马射线.
- 将被动NGET技术应用于屏蔽的旧废物容器和模拟的废物桶.
主要成果:
- 使用NGET证明了裂变事件的敏感检测和3D定位.
- 成功地将NGET应用于长寿命放射性废物的屏蔽容器.
- 提供了斯图兹维克站点测量结果和实验室模拟结果.
结论:
- NGET提供了一种有前途的被动方法,用于对具有挑战性的放射性废物进行增强的非破坏性检测.
- 该技术有助于精确识别和定位化物,这对于处置和安全措施至关重要.
- 在有限的文档的情况下,NGET显示了改善遗留废物的表征的潜力.
相关概念视频
Imaging Studies II: Positron Emission Tomography and Scintigraphy
88
Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
Fundamental Principles of PET
Fundamental Principles of PET
88
Nuclear Power
7.7K
Controlled nuclear fission reactions are used to generate electricity. Any nuclear reactor that produces power via the fission of uranium or plutonium by bombardment with neutrons has six components: nuclear fuel consisting of fissionable material, a nuclear moderator, a neutron source, control rods, reactor coolant, and a shield and containment system.
Nuclear Fuels
Nuclear fuel consists of a fissile isotope, such as uranium-235, which must be present in sufficient quantity to provide a...
Nuclear Fuels
Nuclear fuel consists of a fissile isotope, such as uranium-235, which must be present in sufficient quantity to provide a...
7.7K
X-ray Imaging
5.4K
German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...
5.4K
Radiological Investigation I: X-ray and CT
214
Radiological investigations, including X-rays and computed tomography (CT) scans, are critical for diagnosing and evaluating various medical conditions. These imaging techniques provide valuable insights into the body's internal structures, aiding in the detection of abnormalities, assessment of disease progression, and development of treatment strategies. This article delves into two primary radiological investigations, chest X-rays and CT scans, outlining their purpose, procedures, and...
214
Imaging Studies for Cardiovascular System III: X-Ray
147
The most common cardiovascular diagnostic test is an X-ray. It produces images of the heart, blood vessels, and adjacent structures.
Definition and Purpose
An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
Definition and Purpose
An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
147
Positron Emission Tomography
4.0K
Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
4.0K


