堆芯严重损坏事故中冷却剂系统发生的现象

A. Malinauskas
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引用次数: 0

摘要

核电厂的反应堆冷却剂系统(RCS)由反应堆压力容器、管道和相关部件组成,这些部件是冷却剂连续循环所必需的,冷却剂用于在整个系统中保持热平衡。在发生事故时,RCS也是阻止放射性有毒物质进入生物圈的几个屏障之一。与正常运行条件相比,严重堆芯损坏事故的特点是热量和质量通量在时间和空间上发生显著变化,并最终在RCS内发生几何变化。此外,在严重事故模式下描述系统的困难由于化学反应的发生而变得更加复杂。这些反应可以影响系统的热传递行为和质量传递行为。此外,在事故过程中,反应堆容器内部和从堆芯区域释放的物质(尤其是放射性裂变产物)的行为也同样成为分析人员关注的问题。本报告解决了这些问题。参9。, 1页。
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Phenomena Occurring in the Reactor Coolant System during Severe Core Damage Accidents
The reactor coolant system (RCS) of a nuclear power plant consists of the reactor pressure vessel and the piping and associated components that are required for the continuous circulation of the coolant which is used to maintain thermal equilibrium throughout the system. In the event of an accident, the RCS also serves as one of several barriers to the escape of radiotoxic material into the biosphere. In contrast to normal operating conditions, severe core damage accidents are characterized by significant temporal and spatial variations in heat and mass fluxes, and by eventual geometrical changes within the RCS. Furthermore, the difficulties in describing the system in the severe accident mode are compounded by the occurrence of chemical reactions. These reactions can influence both the thermal and the mass transport behavior of the system. In addition, behavior of the reactor vessel internals and of materials released from the core region (especially the radioactive fission products) in the course of the accident likewise become of concern to the analyst. This report addresses these concerns. 9 refs., 1 tab.
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Chemical interactions with Primary Circuit Surfaces under Severe Accident Conditions An Overview of Containment Fission Product Behavior and Transport Codes Large-Scale Experiments on Hydrogen Distribution Correlation of Recent Fission Product Release Data Phenomena Occurring in the Reactor Coolant System during Severe Core Damage Accidents
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