Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Nuclear Power02:36

Nuclear Power

10.0K
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...
10.0K
Nuclear Stability03:18

Nuclear Stability

24.7K
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...
24.7K
Nuclear Fission02:50

Nuclear Fission

13.1K
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...
13.1K
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

21.1K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
21.1K
Microbial Bioremediation of Uranium01:25

Microbial Bioremediation of Uranium

87
Microorganisms play a critical role in the transformation and immobilization of uranium in contaminated environments through four main pathways: bioreduction, biosorption, bioaccumulation, and biomineralization. These mechanisms reduce uranium’s toxicity and prevent its migration through groundwater systems, offering sustainable approaches for in situ bioremediation.Bioreduction of UraniumBioreduction is driven by anaerobic bacteria such as certain strains of Geobacter and Shewanella,...
87

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Boroxol ring dissolution in molten and glassy B2O3 by neutron and x-ray diffraction difference methods.

The Journal of chemical physics·2025
Same author

Hydrogen Bonding in Amorphous Indomethacin.

Pharmaceutics·2024
Same author

Design, calibration, and performance of a uniaxial pressure cell for neutron scattering studies of quantum magnetism.

The Review of scientific instruments·2023
Same author

The structure of molten calcium ferrite under various redox conditions.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2023
Same author

X-ray Diffraction of Water in Polyvinylpyrrolidone.

Molecular pharmaceutics·2023
Same author

Boron coordination change in barium borate melts and glasses and its contribution to configurational heat capacity, entropy, and fragility.

The Journal of chemical physics·2023
Same journal

Erratum for the Research Article "Detecting supramolecular organic nanoparticles during heat wave".

Science (New York, N.Y.)·2026
Same journal

Local signals, systemic decline.

Science (New York, N.Y.)·2026
Same journal

The mechanics of liver regeneration.

Science (New York, N.Y.)·2026
Same journal

Computing in a memory with physics.

Science (New York, N.Y.)·2026
Same journal

Retraction.

Science (New York, N.Y.)·2026
Same journal

Making time.

Science (New York, N.Y.)·2026
関連記事をすべて見る

関連する実験動画

Updated: Apr 20, 2026

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident
09:18

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident

Published on: December 14, 2017

11.2K

融解ウラン二酸化物の構造と動態

L B Skinner1, C J Benmore2, J K R Weber3

  • 1X-ray Science Division, Argonne National Laboratory, Argonne, IL 60439, USA. Mineral Physics Institute, Stony Brook University, Stony Brook, NY 11794-2100, USA. Materials Development, Inc., 3090 Daniels Court, Arlington Heights, IL 60004, USA. lawrie.skinner@gmail.com.

Science (New York, N.Y.)
|November 22, 2014
PubMed
まとめ
この要約は機械生成です。

研究者らは,核燃料である溶けた二酸化ウラン (UO2) を,先進的な技術を用いて研究した. 溶けたUO2は,より低いウラン-酸素調整数を有し,原子炉事故時の振る舞いに影響を与えることを発見しました.

さらに関連する動画

U2O5 Film Preparation via UO2 Deposition by Direct Current Sputtering and Successive Oxidation and Reduction with Atomic Oxygen and Atomic Hydrogen
12:05

U2O5 Film Preparation via UO2 Deposition by Direct Current Sputtering and Successive Oxidation and Reduction with Atomic Oxygen and Atomic Hydrogen

Published on: February 21, 2019

8.6K
Analyzing Melts and Fluids from Ab Initio Molecular Dynamics Simulations with the UMD Package
06:37

Analyzing Melts and Fluids from Ab Initio Molecular Dynamics Simulations with the UMD Package

Published on: September 17, 2021

5.3K

関連する実験動画

Last Updated: Apr 20, 2026

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident
09:18

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident

Published on: December 14, 2017

11.2K
U2O5 Film Preparation via UO2 Deposition by Direct Current Sputtering and Successive Oxidation and Reduction with Atomic Oxygen and Atomic Hydrogen
12:05

U2O5 Film Preparation via UO2 Deposition by Direct Current Sputtering and Successive Oxidation and Reduction with Atomic Oxygen and Atomic Hydrogen

Published on: February 21, 2019

8.6K
Analyzing Melts and Fluids from Ab Initio Molecular Dynamics Simulations with the UMD Package
06:37

Analyzing Melts and Fluids from Ab Initio Molecular Dynamics Simulations with the UMD Package

Published on: September 17, 2021

5.3K

科学分野:

  • マテリアルサイエンス 材料科学
  • 核工学は原子力工学である.
  • 高温化学 高温化学

背景:

  • 二酸化ウラン (UO2) は,核分裂炉の主要な燃料である.
  • 溶けたUO2の振る舞いを理解することは,重度の事故時に原子炉の安全性にとって極めて重要です.
  • 高温と溶けたUO2の反応性は,歴史的に構造の研究が限られている.

研究 の 目的:

  • 極度の温度下での固体および溶融の二酸化ウラン (UO2) の原子構造を調査する.
  • 融解時のウランと酸素の調整変化を決定する.
  • 事故時の核燃料の振る舞いのモデルの改善のためのデータを提供する.

主な方法:

  • 高温 (>3140 K) を達成するために,レーザー加熱とサンプル浮揚技術を活用しました.
  • パア分布関数 (PDF) の測定を行うためにシンクロトロンX線 difraktion を採用した.
  • 実験的構造データに基づく分子動力学 (MD) モデルを開発・改良.

主要な成果:

  • ラムダ変換 (2670 K) 近くの固体UO2で,U-O調整の最小限の変化で酸素の乱れが増加した.
  • 融解時に平均U-O調整が8から6.7±0.5に大幅に低下することが判定された.
  • MDシミュレーションでは,8協調メルトと比較して,溶けた状態でのU-Uの移動性が高いことが予測されました.

結論:

  • この研究は,溶けたUO2.2に対する最初の構造的洞察を提供します.
  • U-Oの調整の低下とU-Uの移動性の増加は,溶けたUO2.0の重要な特徴です.
  • これらの発見は,原子力発電所の正確な安全評価と事故シミュレーションに不可欠です.