The minimum film boiling temperature (T_min) is one of the primary factors that influence the efficiency of rewetting of nuclear fuel rods after a loss-of-coolant accident (LOCA) in a light water reactor. In order to properly study the mechanisms behind the transient heat transfer phenomena that occurs during quenching, experimentation must be done using the most high-fidelity, high-resolution instrumentation available. In past experiments, thermocouples have been used to measure the temperature change in fuel rod simulators during quenching. However, these devices do not provide a high enough spatial resolution to obtain a full measurement of the temperature change throughout the rods. In order to study the entire test length during quenching, optical fiber temperature sensors are used and compared to the thermocouples. These fiber sensors have the capability of measuring every 0.65 mm with a similar degree of accuracy to the thermocouple measurements. By utilizing optical fiber sensors, the effects of cladding material, liquid subcooling, and surface roughness on the quenching temperature of fuel rod simulators is studied. In addition, the effect of axial heat conduction of the quenching temperature is also made possible to examine using fiber optic sensors. By better understanding the factors that influence quenching, one can properly study the effect of cladding surface properties on the safety of nuclear reactors.

最低膜沸温度（T _min) 是影响轻水反应堆失冷事故 (LOCA) 后核燃料棒再润湿效率的主要因素之一。为了正确研究淬火过程中发生的瞬态传热现象背后的机制，必须使用最高保真度、高分辨率的仪器进行实验。在过去的实验中，热电偶已被用于测量淬火过程中燃料棒模拟器中的温度变化。然而，这些设备不能提供足够高的空间分辨率来获得整个杆的温度变化的完整测量值。为了研究淬火过程中的整个测试长度，使用光纤温度传感器并与热电偶进行比较。这些光纤传感器具有每 0 测量一次的能力。65 mm，具有与热电偶测量相似的精度。利用光纤传感器，研究了包层材料、液体过冷度和表面粗糙度对燃料棒模拟器淬火温度的影响。此外，还可以使用光纤传感器检查淬火温度对轴向热传导的影响。通过更好地了解影响淬火的因素，可以正确研究包壳表面特性对核反应堆安全的影响。还可以使用光纤传感器检查淬火温度的轴向热传导的影响。通过更好地了解影响淬火的因素，可以正确研究包壳表面特性对核反应堆安全的影响。还可以使用光纤传感器检查淬火温度的轴向热传导的影响。通过更好地了解影响淬火的因素，可以正确研究包壳表面特性对核反应堆安全的影响。