This paper presents the performance assessment of smart pressure transmitters subjected to accelerated radiation environment. Two transmitters were subjected to accelerated radiation ageing with a cumulative dose of 73 krad and 47 krad respectively at a dose rate of 1.878 k Gy/hr using cobalt-60 gamma radiation source. Investigation was mainly concerned about studying the performance parameters such as calibration, insulation resistance and power supply variation effects. It was observed during testing that one of the transmitters failed within 25 min of radiation aging. It was also evident that the sensor part of the transmitter was highly sensitive to gamma radiation which was found to be a major cause for change in the transmitter drift. A significant degradation was also observed in O-rings due to radiation ageing. A microscopic examination of hardware part of the circuit board was carried out and found significant degradation in the equipment circuit board which concludes to poor workmanship, manufacturing process and radiation effect.

中文翻译：

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核电厂辐射老化环境下智能压力变送器的性能

本文介绍了在加速辐射环境下智能压力变送器的性能评估。使用钴60伽玛辐射源，使两个发射器分别以1.878 k Gy / hr的剂量率分别经受了73 krad和47 krad的累积剂量的加速辐射老化。研究主要关注于研究性能参数，例如校准，绝缘电阻和电源变化影响。在测试过程中观察到，其中一个发射机在辐射老化的25分钟内发生故障。同样明显的是，发射器的传感器部分对伽马辐射高度敏感，这被认为是造成发射器漂移变化的主要原因。由于辐射老化，在O形圈中也观察到了明显的降解。