subcritical state

简明释义

次临界状态

英英释义

例句

1.The research team conducted experiments to observe the behavior of materials in a subcritical state (亚临界状态).

研究小组进行了实验，以观察材料在亚临界状态 (亚临界状态) 下的行为。

2.During the experiment, the scientists measured the energy levels while the material was in a subcritical state (亚临界状态).

在实验过程中，科学家们测量了材料处于亚临界状态 (亚临界状态) 时的能量水平。

3.In nuclear reactors, maintaining a subcritical state (亚临界状态) is crucial for safety.

在核反应堆中，维持一个亚临界状态 (亚临界状态) 对安全至关重要。

4.When the reactor reaches a subcritical state (亚临界状态), it means that the chain reaction has slowed down significantly.

当反应堆达到亚临界状态 (亚临界状态) 时，这意味着链式反应已经显著减缓。

5.Safety protocols require operators to ensure the system remains in a subcritical state (亚临界状态) during maintenance.

安全协议要求操作员在维护期间确保系统保持在亚临界状态 (亚临界状态)。

作文

In the field of nuclear physics, the term subcritical state refers to a condition in which a nuclear chain reaction is not self-sustaining. This means that the number of neutrons produced by fission reactions is less than the number of neutrons needed to sustain those reactions. Understanding the subcritical state is crucial for ensuring safety in nuclear reactors and other applications involving nuclear materials.A subcritical state can be achieved through various means, such as controlling the amount of fissile material present or utilizing neutron-absorbing materials. For instance, in a nuclear reactor, operators may adjust the configuration of fuel rods or insert control rods made of materials like boron or cadmium that capture neutrons. By doing so, they can maintain the reactor in a subcritical state, thereby preventing an uncontrolled nuclear reaction.The importance of maintaining a subcritical state extends beyond just operational safety; it is also a key concept in the design and decommissioning of nuclear facilities. When a reactor is shut down, it must be brought to a subcritical state before maintenance or decommissioning can safely occur. This process involves careful calculations and monitoring to ensure that all parameters remain within safe limits.Moreover, the concept of a subcritical state is not limited to nuclear reactors. It is also relevant in the context of nuclear weapons. In this arena, a subcritical state is essential during the assembly of nuclear warheads. The components are designed to remain in a subcritical state until the precise moment of detonation is intended, at which point they reach a supercritical state to produce a nuclear explosion. This transition from subcritical state to supercritical state must be managed with extreme precision to avoid accidental detonation.In addition to its implications in nuclear physics, the concept of a subcritical state can be metaphorically applied to various fields, including ecology and economics. For example, in ecological systems, a subcritical state could describe a scenario where a population of species is stable but not growing, indicating that external factors must be carefully managed to prevent decline. Similarly, in economics, a subcritical state might refer to a market that is stable but lacks growth potential, requiring strategic investment or policy changes to stimulate activity.Ultimately, understanding the subcritical state and its implications is vital across multiple disciplines. It highlights the importance of balance and control in complex systems, whether they involve nuclear reactions, ecological dynamics, or economic markets. As we continue to explore these intricate systems, the concept of a subcritical state serves as a reminder of the delicate equilibrium that must be maintained to ensure safety, sustainability, and growth. By mastering the principles behind the subcritical state, we can better navigate the challenges that arise in both scientific and practical applications.

在核物理领域，短语subcritical state指的是一种核链反应不自持的状态。这意味着裂变反应产生的中子数量少于维持这些反应所需的中子数量。理解subcritical state对于确保核反应堆和其他涉及核材料的应用的安全至关重要。可以通过多种方式实现subcritical state，例如控制存在的裂变材料的数量或使用吸收中子的材料。例如，在核反应堆中，操作员可以调整燃料棒的配置，或者插入由硼或镉等材料制成的控制棒，这些材料可以捕获中子。通过这样做，他们可以保持反应堆处于subcritical state，从而防止失控的核反应。保持subcritical state的重要性不仅仅限于操作安全；它也是核设施设计和退役中的关键概念。当反应堆关闭时，必须将其带入subcritical state，然后才能安全地进行维护或退役。这个过程涉及仔细的计算和监测，以确保所有参数保持在安全范围内。此外，subcritical state的概念不仅限于核反应堆。在核武器的背景下，它也很相关。在这个领域，subcritical state在核弹头组装过程中是必不可少的。组件设计为在预定引爆时保持在subcritical state，此时它们达到超临界状态以产生核爆炸。这个从subcritical state到超临界状态的转变必须精确管理，以避免意外引爆。除了在核物理学中的影响外，subcritical state的概念还可以比喻性地应用于各个领域，包括生态学和经济学。例如，在生态系统中，subcritical state可以描述一种物种种群稳定但不增长的情景，表明必须小心管理外部因素以防止衰退。同样，在经济学中，subcritical state可能指的是一个稳定但缺乏增长潜力的市场，需要战略投资或政策变化来刺激活动。最终，理解subcritical state及其影响在多个学科中都是至关重要的。它突显了在复杂系统中保持平衡和控制的重要性，无论这些系统涉及核反应、生态动态还是经济市场。随着我们继续探索这些复杂系统，subcritical state的概念提醒我们必须保持微妙的平衡，以确保安全、可持续和增长。通过掌握subcritical state背后的原则，我们可以更好地应对科学和实际应用中出现的挑战。