thermal fission

简明释义

热中子裂变

英英释义

例句

1.The release of energy during thermal fission 热裂变 can be harnessed for electricity generation.

在热裂变 thermal fission 过程中释放的能量可以被利用来发电。

2.The process of thermal fission 热裂变 is crucial in nuclear reactors for generating energy.

在核反应堆中，热裂变 thermal fission 的过程对于产生能量至关重要。

3.Scientists are researching ways to improve the efficiency of thermal fission 热裂变 reactions.

科学家们正在研究提高热裂变 thermal fission 反应效率的方法。

4.Understanding thermal fission 热裂变 is essential for developing safer nuclear power plants.

理解热裂变 thermal fission 对于开发更安全的核电站至关重要。

5.Nuclear weapons utilize uncontrolled thermal fission 热裂变 to create massive explosions.

核武器利用失控的热裂变 thermal fission 产生巨大的爆炸。

作文

The concept of thermal fission is fundamental to our understanding of nuclear energy and its applications. In simple terms, thermal fission refers to the process by which a heavy nucleus, such as uranium-235 or plutonium-239, absorbs a thermal neutron and subsequently splits into two smaller nuclei, along with the release of a significant amount of energy. This reaction is not only crucial for the functioning of nuclear reactors but also plays a pivotal role in the development of nuclear weapons. To comprehend thermal fission, it is important to understand the basic principles of nuclear physics. Atoms are composed of protons, neutrons, and electrons, and the nucleus of an atom contains protons and neutrons. In the case of heavy elements like uranium, the nucleus is large and unstable. When a thermal neutron collides with the nucleus of a uranium atom, it can cause the nucleus to become even more unstable, leading to its splitting. This process releases additional neutrons, which can then initiate further fission reactions, creating a chain reaction.The energy produced from thermal fission is immense. For instance, the fission of just one kilogram of uranium can release about 24,000 megawatt-hours of energy, which is enough to power a city for several days. This immense energy output is what makes nuclear power a viable alternative to fossil fuels. However, harnessing this energy comes with challenges, particularly in ensuring safety and managing radioactive waste.In nuclear reactors, thermal fission is carefully controlled to produce a steady output of energy. The reactor uses control rods made of materials that absorb neutrons, thereby regulating the fission process. By adjusting the position of these control rods, operators can increase or decrease the rate of fission, allowing for a stable production of electricity. This controlled environment is essential for preventing accidents, as uncontrolled fission can lead to catastrophic events, as seen in historical disasters like Chernobyl and Fukushima.Moreover, the byproducts of thermal fission are radioactive isotopes, which pose significant challenges in terms of waste management. These byproducts can remain hazardous for thousands of years, necessitating secure storage solutions. Scientists and engineers are continually researching methods to recycle nuclear fuel and minimize waste. Innovations in technology may lead to more efficient reactors that produce less waste and use more of the fuel’s energy potential.The implications of thermal fission extend beyond energy production. It raises ethical and environmental questions regarding the sustainability of nuclear energy. While it produces low greenhouse gas emissions compared to fossil fuels, the long-term effects of radiation and the risks of nuclear proliferation must be addressed. Public perception of nuclear energy is often influenced by fears surrounding accidents and the potential for misuse in weapons development.In conclusion, thermal fission is a powerful process that has transformed the way we generate energy. Its ability to provide a large amount of energy from a small amount of fuel makes it an attractive option for meeting global energy demands. However, the challenges associated with safety, waste management, and public perception must be navigated carefully. As technology advances, the future of thermal fission could play a crucial role in achieving a sustainable energy landscape, balancing the need for energy with the imperative of environmental stewardship.

“热裂变”这一概念对于我们理解核能及其应用至关重要。简单来说，“热裂变”指的是一种重核，如铀-235或钚-239，吸收一个热中子后随即分裂成两个较小的原子核，并释放出大量能量的过程。这一反应不仅对核反应堆的运行至关重要，而且在核武器的发展中也扮演着关键角色。要理解“热裂变”，首先需要了解核物理的基本原理。原子由质子、中子和电子组成，而原子的核包含质子和中子。在铀等重元素的情况下，核大且不稳定。当一个热中子与铀原子的核碰撞时，它可能导致核变得更加不稳定，从而引发其分裂。这个过程会释放出额外的中子，这些中子可以进一步引发裂变反应，形成链式反应。“热裂变”产生的能量是巨大的。例如，仅一公斤铀的裂变就能释放约24000兆瓦时的能量，足够为一个城市提供几天的电力。这种巨大的能量输出使得核能成为化石燃料的可行替代品。然而，利用这种能量面临着挑战，特别是在确保安全和管理放射性废物方面。在核反应堆中，“热裂变”被精确控制以产生稳定的能量输出。反应堆使用由吸收中子的材料制成的控制棒，从而调节裂变过程。通过调整这些控制棒的位置，操作人员可以增加或减少裂变的速度，从而实现稳定的电力生产。这种受控环境对于防止事故至关重要，因为不受控制的裂变可能导致灾难性的事件，就像切尔诺贝利和福岛等历史灾难所示。此外，“热裂变”的副产物是放射性同位素，这在废物管理方面带来了重大挑战。这些副产物可能在数千年内保持危险性，因此需要安全的储存解决方案。科学家和工程师们正在不断研究回收核燃料和减少废物的方法。技术创新可能导致更高效的反应堆，产生更少的废物并利用更多燃料的能量潜力。“热裂变”的影响超越了能源生产。它引发了关于核能可持续性的伦理和环境问题。尽管与化石燃料相比，它产生的温室气体排放较低，但辐射的长期影响和核扩散的风险必须得到解决。公众对核能的看法往往受到对事故和武器开发潜在滥用的恐惧的影响。总之，“热裂变”是一种强大的过程，改变了我们发电的方式。它能够从少量燃料中提供大量能量，使其成为满足全球能源需求的有吸引力的选择。然而，与安全、废物管理和公众看法相关的挑战必须谨慎应对。随着技术的进步，“热裂变”的未来可能在实现可持续能源格局方面发挥关键作用，在满足能源需求与环境保护之间取得平衡。