RPN中间量程电流量程切换问题的研究

Research for RPN Intermediate Range Current Range Switch Problem

针对核仪表系统（RPN）中间量程电流量程切换过程容易出现尖峰电流触发意外停堆的问题，提出了一种软件解决方案。大量的工厂测试及现场测试表明，优化后的软件可以有效避免量程切换过程出现电流尖峰，量程切换过渡平滑稳定，系统稳定性显著提高。该方案已在多台核电机组实施，中间量程在不同的堆芯状态均能实现稳定输出，有效避免了尖峰电流触发反应堆意外停堆给电厂带来的经济损失。

One software solution was presented to solve the unexpected reactor trip problem ,which was caused by peak current generated during current range switch of intermediate range of nuclear instrument system （RPN） .A lot of tests were performed in factory and on site .T he results show that the peak current can be avoided effectively using this software solution ,the current range can be switched smoothly and the system stability is improved significantly .Furthermore ,this software solution was applied in many nuclear power plants ,a stable output can be achieved by intermediate range at different core status ,and consequently the economic loss caused by unexpected reactor trip can be avoided .