AP1000核电厂除盐水中总有机碳的综合治理

Comprehensive Control of TOC in Demineralized Water at AP1000 Nuclear Power Plant

AP1000三代核电机组水质指标要求总有机碳(TOC)小于50μg/L。除盐水中TOC的主要来源于原水预处理残留和系统内有机物的分解,TOC在高温或辐照下会生成有机酸,腐蚀金属材料。通过混凝、反渗透、紫外照射等方法综合治理可以有效去除除盐水中残留的TOC。

AP1000 as the third generation of nuclear power units,requires its operation water to be below 50ppm of TOC as described in its Chemistry Manual.TOC contained in Demineralized Water(DW) is mainly the residual of the process of DW raw water pre-treatment.Another source of TOC is owing to decomposition of the organic materials in the system.When exposed to high temperature or radiation,TOC yields organic acid which will corrode metallic materials.TOC contained in DW can be effectively removed by operations of mixed condensing,reverse osmosis(RO),ultra-violet ray radiation,and etc.