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相关概念视频

Nuclear Power02:36

Nuclear Power

7.8K
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...
7.8K
Nuclear Transmutation03:20

Nuclear Transmutation

17.6K
Nuclear transmutation is the conversion of one nuclide into another. It can occur by the radioactive decay of a nucleus, or the reaction of a nucleus with another particle. The first manmade nucleus was produced in Ernest Rutherford’s laboratory in 1919 by a transmutation reaction, the bombardment of one type of nuclei with other nuclei or with neutrons. Rutherford bombarded nitrogen-14 atoms with high-speed α particles from a natural radioactive isotope of radium and observed...
17.6K
Nuclear Fission02:50

Nuclear Fission

9.7K
Many heavier elements with smaller binding energies per nucleon can decompose into more stable elements that have intermediate mass numbers and larger binding energies per nucleon—that is, mass numbers and binding energies per nucleon that are closer to the “peak” of the binding energy graph near 56. Sometimes neutrons are also produced. This decomposition of a large nucleus into smaller pieces is called fission. The breaking is rather random with the formation of a large...
9.7K
Radioactivity and Nuclear Equations03:18

Radioactivity and Nuclear Equations

21.1K
Nuclear chemistry is the study of reactions that involve changes in nuclear structure. The nucleus of an atom is composed of protons and, except for hydrogen, neutrons. The number of protons in the nucleus is called the atomic number (Z) of the element, and the sum of the number of protons and the number of neutrons is the mass number (A). Atoms with the same atomic number but different mass numbers are isotopes of the same element.
A nuclide of an element has a specific number of protons and...
21.1K
Nuclear Stability03:18

Nuclear Stability

18.9K
Protons and neutrons, collectively called nucleons, are packed together tightly in a nucleus. With a radius of about 10−15 meters, a nucleus is quite small compared to the radius of the entire atom, which is about 10−10 meters. Nuclei are extremely dense compared to bulk matter, averaging 1.8 × 1014 grams per cubic centimeter. If the earth’s density were equal to the average nuclear density, the earth’s radius would be only about 200 meters.
To hold positively charged protons together...
18.9K
Nuclear Fusion02:45

Nuclear Fusion

21.0K
The process of converting very light nuclei into heavier nuclei is also accompanied by the conversion of mass into large amounts of energy, a process called fusion. The principal source of energy in the sun is a net fusion reaction in which four hydrogen nuclei fuse and ultimately produce one helium nucleus and two positrons.
A helium nucleus has a mass that is 0.7% less than that of four hydrogen nuclei; this lost mass is converted into energy during the fusion. This reaction produces about...
21.0K

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相关实验视频

Updated: Jul 14, 2025

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident
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来自ARGOS用户组核应急演习的经验.

Blake Orr1, Agnieszka Hac-Heimburg2, Naeem Ul Hasan Syed3

  • 1Australian Radiation Protection and Nuclear Safety Agency (ARPANSA), 619 Lower Plenty Road, Yallambie, Melbourne, Australia.

Journal of environmental radioactivity
|October 5, 2023
PubMed
概括

使用事故报告和指导操作系统 (ARGOS) 的桌面练习测试了对核事故的应急准备. 虽然对浮动工厂的结果达成一致,但芬兰工厂的情况显示出因不同来源期估计的差异而存在差异.

关键词:
阿尔戈斯是支持决策的工具.大气运输是大气中的运输.剂量评估 剂量评估应急准备情况 应急准备情况运动运动运动.建模模型 建模模型

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科学领域:

  • 核安全和核安全问题
  • 环境辐射环境辐射
  • 应急响应计划 应急响应计划

背景情况:

  • 事故报告和指导操作系统 (ARGOS) 是核和辐射应急准备和应对 (EPR) 的关键决策支持工具.
  • 参与EPR的政府机构的全球用户群使用ARGOS.
  • 定期练习对于保持熟练程度和评估决策支持系统至关重要.

研究的目的:

  • 培训ARGOS用户,增强他们对系统能力的了解.
  • 为了比较不同参与者的模型输出和保护行动建议.
  • 在模拟的核和放射性事件中确定影响反应变异性的因素.

主要方法:

  • 为ARGOS用户群进行了2020桌面练习.
  • 模拟了两个假设的事故场景:一个漂浮的核电站 (NPP) 和洛维萨核电站.
  • 参与者使用ARGOS来建模后果,估计来源术语 (如适用),并建议采取保护措施.

主要成果:

  • 在浮动核电站场景中,人们普遍同意羽毛的方向和范围.
  • 洛维萨核电站场景的结果变化较大,受参与者提供的来源条款差异的影响.
  • 分散建模,来源术语估计和保护行动建议显示了共识和分歧的领域.

结论:

  • 参与此次演习增加了用户对ARGOS的知识和理解,用于核和放射性紧急情况的规划和应对.
  • 该演习强调了准确的源代码信息在一致的应急响应建模中的重要性.
  • 像ARGOS这样的决策支持工具对于提高核紧急情况的准备和应对能力是有价值的.