void reactivity coefficient

简明释义

反应性空穴系数

英英释义

例句

1.In a boiling water reactor, the void reactivity coefficient 空隙反应性系数 plays a critical role in the control of power output.

在沸水反应堆中，空隙反应性系数在控制功率输出中起着关键作用。

2.The void reactivity coefficient 空隙反应性系数 is influenced by factors such as coolant density and temperature.

影响空隙反应性系数的因素包括冷却剂的密度和温度。

3.A high void reactivity coefficient 空隙反应性系数 can lead to increased reactivity in a reactor, potentially causing safety concerns.

高空隙反应性系数可能导致反应堆中的反应性增加，从而引发安全问题。

4.Engineers must carefully monitor the void reactivity coefficient 空隙反应性系数 during operation to ensure stability.

工程师必须在操作期间仔细监测空隙反应性系数以确保稳定性。

5.The calculation of the void reactivity coefficient 空隙反应性系数 is essential for understanding the behavior of nuclear reactors during transient conditions.

计算空隙反应性系数对于理解核反应堆在瞬态条件下的行为至关重要。

作文

In the field of nuclear engineering, understanding the dynamics of reactor behavior is crucial for ensuring safety and efficiency. One important concept in this domain is the void reactivity coefficient, which plays a significant role in the operation of nuclear reactors. The term refers to how the reactivity of a nuclear reactor changes when there is a change in the amount of void space—essentially steam or gas bubbles—in the reactor core. This coefficient is vital because it helps predict the reactor's response to changes in temperature and pressure, which can occur during normal operations or potential accidents.The void reactivity coefficient is typically expressed as a ratio or a percentage, indicating how much the reactor's reactivity will increase or decrease with the formation of voids. A positive void reactivity coefficient means that as more voids form, the reactor becomes more reactive, which can lead to an increase in power output. Conversely, a negative coefficient indicates that the formation of voids reduces reactivity, leading to a decrease in power output. Understanding whether the coefficient is positive or negative is essential for reactor designers and operators, as it directly impacts the safety margins of the reactor.In boiling water reactors (BWRs), for example, the presence of steam bubbles is a normal part of the operation. The void reactivity coefficient in these reactors is generally positive, meaning that as steam is produced, the reactivity increases. This characteristic must be carefully managed; otherwise, it could lead to an uncontrolled increase in reactor power. Operators must monitor the reactor conditions closely to ensure that any changes in void formation do not push the reactor towards unsafe operational states.On the other hand, pressurized water reactors (PWRs) typically exhibit a negative void reactivity coefficient. In these systems, the coolant remains liquid under high pressure, and any formation of vapor (voids) tends to decrease the reactivity. This behavior contributes to the inherent safety features of PWRs, as an increase in temperature and pressure can lead to void formation, which in turn reduces reactivity and helps stabilize the reactor against overheating.The void reactivity coefficient is not just a theoretical concept; it has practical implications for reactor design and operation. Engineers must calculate the coefficient accurately during the design phase to ensure that the reactor operates safely across all expected conditions. Additionally, during reactor operations, continuous monitoring of the void reactivity coefficient is essential for maintaining optimal performance and safety. Any unexpected changes in the coefficient can signal potential issues within the reactor that need to be addressed immediately.In conclusion, the void reactivity coefficient is a critical parameter in nuclear reactor physics that influences both safety and efficiency. By understanding how voids affect reactivity, engineers and operators can better manage reactor operations and prevent accidents. As technology continues to advance, the study of the void reactivity coefficient will remain a key area of focus for ensuring the safe and effective use of nuclear energy.

在核工程领域，理解反应堆行为的动态对于确保安全和效率至关重要。其中一个重要概念是空泡反应性系数，它在核反应堆的运行中起着重要作用。这个术语指的是当反应堆核心中的空泡（基本上是蒸汽或气体泡）数量发生变化时，反应堆的反应性如何变化。这个系数至关重要，因为它帮助预测反应堆对温度和压力变化的响应，这些变化可能发生在正常操作或潜在事故期间。空泡反应性系数通常以比率或百分比表示，指示随着空泡的形成，反应堆的反应性将增加或减少多少。正的空泡反应性系数意味着随着更多空泡的形成，反应堆变得更加反应，从而可能导致功率输出的增加。相反，负系数则表明空泡的形成降低了反应性，导致功率输出的减少。了解系数是正还是负对于反应堆设计者和操作员至关重要，因为它直接影响反应堆的安全边际。例如，在沸水反应堆（BWR）中，蒸汽泡的存在是操作的正常部分。这些反应堆的空泡反应性系数通常是正值，这意味着随着蒸汽的产生，反应性增加。这一特性必须得到仔细管理；否则，可能导致反应堆功率的失控增加。操作员必须密切监控反应堆条件，以确保空泡形成的任何变化不会将反应堆推向不安全的操作状态。另一方面，压水反应堆（PWR）通常表现出负的空泡反应性系数。在这些系统中，冷却剂在高压下保持液态，任何蒸汽（空泡）的形成往往会降低反应性。这种行为有助于压水反应堆的固有安全特性，因为温度和压力的增加可能导致空泡的形成，从而降低反应性，帮助稳定反应堆防止过热。空泡反应性系数不仅是一个理论概念；它对反应堆的设计和操作具有实际影响。工程师必须在设计阶段准确计算该系数，以确保反应堆在所有预期条件下安全运行。此外，在反应堆操作期间，持续监测空泡反应性系数对于维持最佳性能和安全至关重要。系数的任何意外变化都可能表明反应堆内存在潜在问题，需要立即解决。总之，空泡反应性系数是核反应堆物理学中的一个关键参数，影响安全性和效率。通过理解空泡如何影响反应性，工程师和操作员可以更好地管理反应堆操作并防止事故。随着技术的不断进步，对空泡反应性系数的研究将继续成为确保安全有效使用核能的关键关注领域。