安全级仪表通道不确定度计算分析

The channel uncertainty analysis and calculation of 1E instruments

安全级仪表是保证核电厂安全和经济运行的重要设备,其精确度、稳定性及可靠性都有较高的要求。本文介绍了安全级仪表通道不确定度的主要贡献环节以及计算方法,重点分析了核电厂常用的安全级压力、差压变送器的通道不确定度计算方法及其功能精度的影响因素,提出了一种计算安全级仪表通道不确定度的有效方法。

Safety classified（1E） instruments are important devices to ensure safe and economic operation of nuclear power plants. There are higher requirements on their accuracy, stability and reliability. This paper introduces the key factors and channel uncer- tainty calculation method of 1E instruments, and mainly analysis 1E pressure and differential pressure transmitters channel uncertainty calculation method and functional accuracy influencing factors. An effective method to calculate 1E instruments channel uncertainty is proposed.