Aging Review of Hydraulic Structures in Nuclear Power Plant
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摘要: 核电厂水工构筑物是为核安全相关的系统、设备和部件提供防水淹屏障以及冷却水的重要构筑物,在秦山核电厂运行许可证延续(OLE)期间纳入了评估审查的范围。针对核电厂水工构筑物,本次OLE项目确定了核电厂水工构筑物的管理范围、老化效应,开展了老化管理审查(AMR)和水下检查活动,掌握了水工构筑物的实际服役状态,证明了水工构筑物可继续在核电厂延续运行期间执行其预期功能。
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关键词:
- 运行许可证延续(OLE) /
- 水工构筑物 /
- 老化管理审查(AMR)
Abstract: Hydraulic structures of the nuclear power plant are important structures that provide water-flooding barrier and cooling water for nuclear safety related systems, equipment and components, and have been included in the scope of assessment and review during the Operation License Extension (OLE) of Qinshan Nuclear Power Plant. Aiming at the hydraulic structures of nuclear power plants, this OLE project determines the management scope and aging effect of hydraulic structures of nuclear power plants, carries out aging management review (AMR) and underwater inspection activities, and grasps the actual service status of hydraulic structures, which proves that hydraulic structures can continue to perform their expected functions during the extended operation of nuclear power plants. -
表 1 秦山核电厂水工构筑物检查大纲管理范围
Table 1. Management Scope of Inspection Program for Hydraulic Structures of Qinshan Nuclear Power Plant
构筑物名称 构件 海堤 挡浪坡、挡浪墙、海堤基础 取水口 取水涵管及支墩、集水井、闸门、拦污栅、设备基础、爬梯、厂房梁板柱、厂房基础 海水取水隧道 隧洞结构 海水泵房 厂房梁板柱、厂房基础、挡水墙、设备基础、挡水密闭门、平台、爬梯、结构伸缩缝、涂层、挡水板 一回路海水管廊 管廊结构、结构伸缩缝 排水渠道 虹吸井、渠道结构 排水隧道 连接井、隧洞结构 排水口 厂房梁板柱、厂房基础、闸门、设备基础、爬梯 表 2 秦山核电厂水工构筑物检查大纲专项检查结果
Table 2. Special Inspection Results of Inspection Program for Hydraulic Structures of Qinshan Nuclear Power Plant
检查对象 检查方法 检查结果 49#-1海水取水口 潜水探测 拦污栅未发现破损;
集水井导墙和伸缩缝覆盖海生物,未发现破损;
取水方涵管壁及伸缩缝完好,未发现破损;
闸门槽被少量海生物覆盖,未发现破损49#-2海水取水隧洞 潜水探测 取水隧洞侧壁被约2 cm厚海生物覆盖,未发现破损现象;取水隧洞底部表面约有20 cm厚淤泥 49#-3海水泵房(下部水室) 潜水探测、目视检查 闸门槽底部约10 cm厚浮泥,未发现破损现象;
取水隧洞海水泵房上游30 m隧洞侧壁覆盖2 cm厚海生物,未发现破损现象;
海水泵房下部水室未发现明显剥落、开裂现象49#-4虹吸井 目视检查 虹吸井表面整体状况良好,基本无海生物,未发现明显剥落、开裂现象,底部淤泥厚度约
10 cm,虹吸井与排水方涵连接处伸缩缝状况良好,未发现剥落49#-5排水渠道 潜水探测 排水渠道外观状态良好,未发现破损现象 49#-6连接井 目视检查 连接井外观状态良好,未发现破损现象 49#-7排水隧洞 潜水探测 洞口完好未发现破损现象;
从洞口向里约10 m有少量海生物,未发现破损;
从洞口约10 m以外混凝土浆,未发现破损现象,底部约60 cm的淤泥49#-8排水口 潜水探测 1#、2#、3#闸槽内被海生物覆盖,门槽导轨内充满泥沙,腐蚀严重;
1#、2#、3#导墙上有少量海生物,未发现破损 -
[1] U. S. Nuclear Regulatory Commission. Inspection of water-control structures associated with nuclear power plants: RG 1.127[R]. Washington, D.C.: NRC, 2016 [2] U. S. Nuclear Regulatory Commission. Generic Aging Lessons Learned (GALL) report: NUREG-1801[R]. Washington: NRC, 2010. [3] Nuclear Energy Institute. Industry guideline for implementing the requirements of 10 CFR part 54 – the license renewal rule: NEI 95-10, revision 5[S].Washington, D.C.: Nuclear Energy Institxute, 2005.
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