The G.A. Siwabessy Multipurpose Reactor (RSG GAS) is a pool-type research reactor. When the reactor operates, the heat released in the core is removed by the primary cooling system. It is necessary to evaluate this system, because failure can cause worst events such as the melting of reactor fuel and the release of radioactivity to the environment. Due to the possibility of radioactive material releases, safety issues are important to be evaluated. Several studies using event tree analysis (ETA), fuzzy fault tree analysis (FFTA) describe the results quantitatively. The varied educations of operators will provide various responses to quantitative results, and a need to create qualitative results that are simple and easy to understand using bowtie analysis that visualizes the risk scenario. Failure of this system causes loss of coolant accident (LOCA) and loss of flow accident (LOFA). The results show that the relationship between the consequences and causes of the risk occurrence LOCA and LOFA, and the controls used to prevent and reduce the hazard based on safety and emergency system at RSG GAS, can be depicted in a bowtie diagram. The bowtie diagram is simple and easy for an RSG GAS operator to carry out their duties and increase awareness regarding the safety of reactor operations.

中文翻译：

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使用蝴蝶结图可视化初级冷却系统风险，以指导 RSG GAS 操作员

GA Siwabessy 多用途反应堆 (RSG GAS) 是一种池式研究反应堆。当反应堆运行时，堆芯中释放的热量由主冷却系统带走。有必要对该系统进行评估，因为故障会导致最严重的事件，例如反应堆燃料的熔化和放射性物质释放到环境中。由于存在放射性物质释放的可能性，因此评估安全问题很重要。一些使用事件树分析 (ETA)、模糊故障树分析 (FFTA) 的研究对结果进行了定量描述。操作员的不同教育将对定量结果提供各种响应，并且需要使用可视化风险情景的蝴蝶结分析来创建简单易懂的定性结果。该系统的故障会导致冷却剂损失事故 (LOCA) 和流量损失事故 (LOFA)。结果表明，风险发生 LOCA 和 LOFA 的后果和原因之间的关系，以及用于预防和减少 RSG GAS 安全和应急系统的危害的控制措施，可以用蝴蝶结图来描述。领结图对于 RSG GAS 操作员执行其职责和提高对反应堆操作安全性的认识来说简单易行。