秦山CANDU核电厂大修周期延长的初步研究

Preliminary Study on Outage Cycle Extension of Qinshan CANDU NPP

重水堆核电厂因其具有不停堆换料的优势,不受燃料燃耗的限制,可安排较长的大修周期。通过大修周期的延长,可以减少电站寿期内计划大修的次数,减少机组停堆和启动的次数,有效提升机组寿期内容量因子、机组大修业绩和运行业绩。本文结合秦山CANDU核电厂和国外重水堆核电厂情况,提出大修周期延长的初步可行性分析和实施建议。

Currently, most NPP operators have attached great importance to the optimization of outage duration. By taking various optimization measures, the operators have managed to optimize the outage duration and improve the operational performance. CANDU NPP, with its unique feature of on-power refueling and less constraint from fuel bum-up, offers the opportunity of longer outage cycle. With the extension of outage cycle, it is possible to reduce the number of outages in the life time of NPP, minimize the number of shutdown and start-ups, increase the outage preparation lead-time, and improve the manpower preparation and training for outage, which could effectively lead to improved capacity factor, outage and operational performance in the life time of the NPP. This paper provided the preliminary study results and process for outage cycle extension taking into account the situation of CANDU NPP in China and abroad, aiming to further improve the operational performance and competitiveness of CANDU NPP in China.