nuclear chain reaction

简明释义

核链式反应

英英释义

例句

1.In a reactor, the nuclear chain reaction (核链反应) is initiated by neutron bombardment.

在反应堆中，核链反应是通过中子轰击启动的。

2.The discovery of the nuclear chain reaction (核链反应) was pivotal in the development of atomic bombs.

对核链反应的发现对原子弹的发展至关重要。

3.Scientists study the nuclear chain reaction (核链反应) to understand how energy can be harnessed from atoms.

科学家研究核链反应以了解如何从原子中获取能量。

4.If not controlled properly, a nuclear chain reaction (核链反应) can lead to catastrophic results.

如果控制不当，核链反应可能导致灾难性的后果。

5.The process of generating electricity in a nuclear power plant relies on a controlled nuclear chain reaction (核链反应).

在核电站中发电的过程依赖于一个受控的核链反应。

作文

A nuclear chain reaction is a process in which a single nuclear reaction causes a series of subsequent reactions, leading to the release of a significant amount of energy. This phenomenon is primarily observed in nuclear fission, where heavy atomic nuclei such as uranium-235 or plutonium-239 are split into smaller fragments. The initial fission event releases neutrons, which can then collide with other nearby nuclei, causing them to undergo fission as well. This creates a self-sustaining cycle of reactions, hence the term 'chain reaction'. The concept of the nuclear chain reaction is fundamental to both nuclear power generation and nuclear weapons. In a nuclear reactor, the chain reaction is carefully controlled to maintain a steady output of energy. Control rods made of materials that absorb neutrons are used to regulate the rate of the reaction, ensuring that it does not escalate uncontrollably. This controlled environment allows for the harnessing of energy from the fission process to produce electricity, which is a cleaner alternative to fossil fuels. On the other hand, in a nuclear bomb, the nuclear chain reaction is designed to occur rapidly and uncontrollably. The goal is to release an immense amount of energy in a very short time, resulting in a powerful explosion. This is achieved by using a supercritical mass of fissile material, which ensures that enough neutrons are produced to sustain the rapid chain reaction. The destructive power of such weapons has led to significant ethical debates regarding their use and the implications for global security. Understanding the mechanics of a nuclear chain reaction is crucial for scientists and engineers working in the field of nuclear physics. It involves complex calculations and simulations to predict how changes in variables, such as temperature, pressure, and the composition of materials, can affect the stability and efficiency of the reaction. Moreover, safety measures must be implemented to prevent accidents that could lead to catastrophic failures, such as meltdowns or radiation leaks. In conclusion, the nuclear chain reaction is a powerful process that has both beneficial applications in energy production and dangerous implications in warfare. Its understanding is essential for advancing nuclear technology while ensuring the safety and security of society. As we continue to explore the potential of nuclear energy, it is vital to approach the topic with both scientific rigor and ethical consideration, balancing innovation with responsibility.

核链反应是一个过程，在这个过程中，单个核反应引发一系列随后的反应，从而释放出大量能量。这种现象主要在核裂变中观察到，其中重原子核如铀-235或钚-239被分裂成较小的碎片。初始的裂变事件释放出中子，这些中子可以与其他附近的原子核碰撞，导致它们也发生裂变。这创造了一个自我维持的反应循环，因此称为“链反应”。核链反应的概念对核能发电和核武器都是至关重要的。在核反应堆中，链反应被精确控制，以保持稳定的能量输出。使用吸收中子的材料制成的控制棒来调节反应速率，确保其不会失控。这种受控环境使得从裂变过程中获取能量以生产电力成为可能，这是化石燃料的更清洁替代品。另一方面，在核弹中，核链反应设计为快速且无法控制地发生。目标是在极短的时间内释放出巨大的能量，从而导致强大的爆炸。这是通过使用超临界质量的裂变材料实现的，这确保产生足够的中子以维持快速的链反应。这类武器的破坏性力量引发了关于其使用及其对全球安全影响的重大伦理辩论。理解核链反应的机制对从事核物理领域的科学家和工程师至关重要。这涉及复杂的计算和模拟，以预测温度、压力和材料成分等变量的变化如何影响反应的稳定性和效率。此外，必须实施安全措施，以防止可能导致灾难性故障的事故，例如熔毁或辐射泄漏。总之，核链反应是一个强大的过程，它在能源生产中有益的应用，同时在战争中具有危险的含义。理解这一点对于推动核技术的发展以及确保社会的安全和保障至关重要。随着我们继续探索核能的潜力，必须以科学严谨和伦理考虑的态度来处理这一主题，平衡创新与责任。