HTR-PM600反应堆保护系统维修策略初步研究

Preliminary Study on Reactor Protection Systems Maintenance Strategy of HTR-PM600

反应堆保护系统是核电站最重要的安全系统,对其实施维修是保障其安全可靠运行的必要手段。HTRPM600由6个反应堆模块组成,每个反应堆模块配备一套保护系统。若HTR-PM600保护系统的维修仍沿用传统单模块核电站的策略,其维修成本将是传统单模块核电站的6倍,单位功率维修成本将显著增加。此外,维修活动对反应堆保护系统也存在一定的不利影响,选取合适的维修周期,才能确保安全可靠性。因此,为了降低HTR-PM600保护系统维修成本,保证其安全稳定运行,有必要对HTR-PM600反应堆保护系统的维修策略开展相关研究。针对反应堆保护系统维修策略的现状和优化模型进行了调研,并对HTR-PM600保护系统维修策略的优化开展了初步研究。

Reactor protection system（RPS） is the most important safety system in nuclear power plants（NPPs）. Proper maintenance is essential to ensure its safe and reliable operation. HTR-PM600 consists of six reactor modules, and each module is equipped with a RPS. If the maintenance strategy of traditional single module NPP RPS is applied to the RPSs of HTR-PM600, the maintenance cost will approximately be six times as much as that of traditional single module NPP, the maintenance cost per unit power will be distinctly increased. In addition, maintenance may have adverse impacts on the system, selecting a suitable maintenance cycle is significant to ensure the safety and reliability of the RPS. Therefore, it is necessary to conduct intensive research on RPS maintenance strategy of HTR-PM600 to significantly reduce its maintenance cost and guarantee the safety and reliability.In this paper, the current research status and optimization models of RPS maintenance strategy were investigated, and preliminary study on maintenance strategy optimization of the HTR-PM600 protection systems is presented.