controlled nuclear fission chain reaction

简明释义

受控核裂变链式反应

英英释义

例句

1.Scientists are researching new materials to enhance the safety of the controlled nuclear fission chain reaction process.

科学家们正在研究新材料，以增强受控核裂变链反应过程的安全性。

2.The power plant operates by maintaining a stable controlled nuclear fission chain reaction, which generates electricity efficiently.

该电厂通过维持一个稳定的受控核裂变链反应来高效发电。

3.Engineers design reactors to ensure that the controlled nuclear fission chain reaction remains stable and safe.

工程师们设计反应堆以确保受控核裂变链反应保持稳定和安全。

4.In nuclear reactors, the controlled nuclear fission chain reaction is carefully monitored to prevent overheating.

在核反应堆中，受控核裂变链反应受到严格监控，以防止过热。

5.The success of nuclear energy relies on the ability to sustain a controlled nuclear fission chain reaction over long periods.

核能的成功依赖于在较长时间内维持受控核裂变链反应的能力。

作文

The concept of a controlled nuclear fission chain reaction is fundamental to our understanding of nuclear energy and its applications. At its core, this process involves the splitting of atomic nuclei, which releases a significant amount of energy. In a controlled nuclear fission chain reaction (受控核裂变链反应), the reaction is carefully managed to prevent an uncontrolled release of energy, which could lead to catastrophic consequences. This management is achieved through various means, including the use of control rods, moderators, and coolants within a nuclear reactor.To grasp the importance of a controlled nuclear fission chain reaction, we must first understand what nuclear fission entails. Nuclear fission occurs when a heavy nucleus, such as uranium-235 or plutonium-239, absorbs a neutron and becomes unstable. This instability causes the nucleus to split into two smaller nuclei, along with additional neutrons and a large amount of energy. The released neutrons can then initiate further fission reactions, leading to a self-sustaining series of reactions known as a chain reaction.In nature, fission reactions can occur spontaneously, but they are typically uncontrolled, resulting in explosive releases of energy, as seen in nuclear weapons. However, the goal of nuclear power generation is to harness this energy in a safe and controlled manner. This is where the controlled nuclear fission chain reaction plays a crucial role. By carefully regulating the number of free neutrons available in the reactor, operators can maintain a steady and manageable rate of fission. Control rods made of materials that absorb neutrons, such as boron or cadmium, are inserted into the reactor core to decrease the number of available neutrons and slow down the reaction. Conversely, when the reaction needs to be increased, these control rods can be withdrawn to allow more neutrons to propagate the fission process. This delicate balance ensures that the nuclear reactor operates efficiently while minimizing the risk of overheating or meltdown.Moreover, the controlled nuclear fission chain reaction is not only vital for energy production but also has applications in medicine and industry. For instance, radioactive isotopes produced through fission processes are used in medical imaging and cancer treatment. Additionally, research reactors utilize controlled fission reactions to produce neutrons for various scientific experiments.In conclusion, the controlled nuclear fission chain reaction is a cornerstone of modern nuclear technology. It enables us to harness the immense energy produced by atomic nuclei in a safe and sustainable way. As we continue to seek alternative energy sources to combat climate change, understanding and improving the processes surrounding controlled nuclear fission chain reaction will be essential for the future of energy generation. By advancing our knowledge in this field, we can ensure that nuclear power remains a viable and responsible option for meeting the world's growing energy demands.

受控核裂变链反应的概念是我们理解核能及其应用的基础。其核心是原子核的裂变，这会释放出大量的能量。在受控核裂变链反应中，该反应经过仔细管理，以防止能量的失控释放，这可能导致灾难性的后果。这种管理通过各种手段实现，包括在核反应堆中使用控制棒、慢化剂和冷却剂。要理解受控核裂变链反应的重要性，我们首先必须了解核裂变的含义。核裂变发生在重核，如铀-235或钚-239，吸收一个中子并变得不稳定时。这种不稳定性导致核裂变为两个较小的核，同时释放出额外的中子和大量能量。释放的中子可以启动进一步的裂变反应，从而导致自我维持的一系列反应，称为链反应。在自然界中，裂变反应可以自发发生，但通常是失控的，导致能量的爆炸性释放，如核武器所示。然而，核电生产的目标是以安全和受控的方式利用这种能量。这就是受控核裂变链反应发挥关键作用的地方。通过仔细调节反应堆中可用的自由中子的数量，操作员可以保持稳定且可管理的裂变速率。由吸收中子的材料（如硼或镉）制成的控制棒被插入反应堆核心，以减少可用中子的数量并减缓反应。相反，当需要增加反应时，这些控制棒可以被拔出，以允许更多的中子传播裂变过程。这种微妙的平衡确保核反应堆高效运行，同时最大限度地降低过热或熔毁的风险。此外，受控核裂变链反应不仅对能源生产至关重要，还在医学和工业中有应用。例如，通过裂变过程产生的放射性同位素用于医学成像和癌症治疗。此外，研究反应堆利用受控裂变反应产生中子，用于各种科学实验。总之，受控核裂变链反应是现代核技术的基石。它使我们能够以安全和可持续的方式利用原子核产生的巨大能量。随着我们继续寻找替代能源以应对气候变化，理解和改善围绕受控核裂变链反应的过程将对未来能源生产至关重要。通过推进我们在这一领域的知识，我们可以确保核能仍然是满足世界日益增长的能源需求的可行和负责任的选择。