核电站海生物拦截体系的探索与实践

Exploration and Practice of Marine Organisms Interception System in Nuclear Power Plant

自2014年以来,国内核电站多次遭受海月水母、沙蜇、孔石莼等海生物爆发入侵引发机组瞬态、降负荷、停机停堆事件,给核电站的安全、稳定运行带来巨大威胁和挑战。面对该问题,红沿河核电站在现有取水口海工结构基础上,通过对取水口周边海域致灾海生物进行调查、分析,识别出致灾风险高的海生物,并对周边海域海流特点进行调查分析,逐步建立起以5道拦截网为主体,包括拦污网布设、清理维护和状态监测的海生物拦截体系,实现了取水口海生物拦截从无到有、从简单到体系化运作,通过工程实践应用取得了良好的效果,有效地降低了海生物大规模入侵对冷源带来的风险,提高了核电站冷源安全的可靠性,给行业提供了有价值的参考。

Since 2014,the domestic nuclear power plants have suffered from the sea jellyfish,sand jellyfish,ulva perva and other Marine organisms,which caused the unit transient,load reduction,shutdown events,have brought great threats and challenges to the safety and stable operation of the nuclear power plant.To solve the problem,on the basis of the existing intake structure,Hongyanhe nuclear power plant identified the high risk Marine organisms through the investigation and analysis of the Marine organisms around the intake,and investigated the surrounding ocean current characteristics,gradually established a Marine organisms interception system with five intercepting nets as the main body,including the layout,cleaning and maintenance of the intercepting net and status monitoring,realizing the sea inlet Marine organisms interception from scratch,from simple to systematic operation.Good results have been obtained through engineering practice,which has effectively reduced the risk of large-scale invasion of Marine organisms on cold source,improved the reliability of cold source safety of nuclear power plant,and provided valuable reference for the industry.